Using EMC Celerra Storage with VMware vSphere and VMware Infrastructure

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Using EMC Celerra Storage with
VMware vSphere and VMware
Infrastructure
Version 4.0
• Connectivity of VMware vSphere or VMware Infrastructure
to Celerra Storage
• Backup and Recovery of VMware vSphere or VMware
Infrastructure on Celerra Storage
• Disaster Recovery of VMware vSphere or VMware
Infrastructure on Celerra Storage
Yossi Mesika
2
Using EMC Celerra Storage with VMware vSphere and VMware Infrastructure
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H5536.9
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Using EMC Celerra Storage with VMware vSphere and VMware Infrastructure
Errata
EMC VSI for VMware vSphere: Unified Storage Management
replaces EMC Celerra Plug-in for VMware............................. 21
Preface
Top five optimization recommendations .................................28
Chapter 1 Introduction to VMware Technology
1.1 VMware vSphere and VMware Infrastructure
virtualization platforms............................................................. 30
1.2 VMware vSphere and VMware Infrastructure
data centers.................................................................................. 34
1.3 Distributed services in VMware vSphere and VMware
Infrastructure............................................................................... 45
1.4 Backup and recovery solutions with VMware vSphere and
VMware Infrastructure............................................................... 50
1.4.1 VMware Data Recovery............................................. 50
1.4.2 VMware Consolidated Backup................................. 52
1.5 VMware vCenter Site Recovery Manager......................... 54
1.5.1 Key benefits of VMware SRM................................... 55
1.6 VMware View........................................................................ 57
1.6.1 Key benefits of VMware View.................................. 57
1.6.2 Components of the VMware View solution........... 58
1.7 VMware vCenter Converter................................................ 60
1.7.1 Migration with vCenter Converter........................... 61
Contents
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Using EMC Celerra Storage with VMware vSphere and VMware Infrastructure
Chapter 2 EMC Foundation Products
2.1 EMC Celerra.......................................................................... 64
2.1.1 Celerra unified storage platform.............................. 66
2.1.2 Celerra gateway.......................................................... 68
2.2 Celerra Manager.................................................................... 70
2.3 EMC CLARiiON.................................................................... 71
2.4 EMC Symmetrix.................................................................... 73
2.4.1 Symmetrix VMAX platform...................................... 74
2.5 Relevant key Celerra features............................................. 76
2.5.1 Celerra Virtual Provisioning..................................... 76
2.5.2 Celerra SnapSure........................................................ 76
2.5.3 Temporary writeable snap........................................ 77
2.5.4 Celerra iSCSI snapshots............................................. 77
2.5.5 Celerra Replicator....................................................... 78
2.5.6 EMC Replication Manager and Celerra................... 80
2.5.7 Celerra Data Deduplication....................................... 81
Chapter 3 VMware vSphere and VMware Infrastructure
Configuration Options
3.1 Introduction........................................................................... 88
3.2 Storage alternatives............................................................... 89
3.3 Configuration roadmap....................................................... 90
3.4 VMware vSphere or VMware Infrastructure installation 93
3.5 Storage considerations......................................................... 94
3.5.1 AVM............................................................................. 96
3.5.2 MVM............................................................................. 97
3.5.3 Storage considerations for using Celerra EFDs.... 107
3.6 VMware vSphere or VMware Infrastructure
configuration............................................................................. 109
3.6.1 ESX and Celerra storage settings............................ 109
3.6.2 ESX iSCSI HBA and NIC driver configuration.... 120
3.6.3 VMkernel port configuration in ESX..................... 120
3.7 Using NFS storage.............................................................. 128
3.7.1 Add a Celerra file system to ESX............................ 128
3.7.2 Create a NAS datastore on an ESX server............. 133
3.8 Using iSCSI storage............................................................ 137
3.8.1 Configuration considerations for Celerra iSCSI with
VMware vSphere and VMware Infrastructure............. 138
3.8.2 Add a Celerra iSCSI device/LUN to ESX............. 139
3.8.3 Create VMFS datastores on ESX............................. 174
3.8.4 Create RDM volumes on ESX servers.................... 182
3.9 Introduction to using Fibre Channel storage.................. 205
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Using EMC Celerra Storage with VMware vSphere and VMware Infrastructure
3.9.1 Create LUNs and add them to a storage group... 205
3.9.2 Create a RAID group................................................ 205
3.9.3 Present the LUN to VMware vSphere or VMware
Infrastructure...................................................................... 219
3.10 Virtual machine considerations....................................... 222
3.10.1 Virtual machine disk partitions alignment......... 222
3.10.2 Virtual machine swap file location....................... 229
3.10.3 Guest OS SCSI timeout settings............................ 236
3.10.4 Paravirtual SCSI (PVSCI) adapters....................... 237
3.11 Monitor and manage storage........................................... 248
3.11.1 Celerra file system notification............................. 248
3.11.2 vCenter Server storage monitoring and alarms. 254
3.12 Virtually provisioned storage.......................................... 258
3.12.1 Configure a NAS datastore on a virtually
provisioned NFS file system............................................. 259
3.12.2 Considerations to use Virtual Provisioning over
NFS....................................................................................... 259
3.12.3 Create a virtually provisioned iSCSI LUN.......... 261
3.12.4 Configure a VMFS datastore on a virtually
provisioned iSCSI LUN..................................................... 261
3.12.5 Considerations to use Virtual Provisioning over
iSCSI/VMFS....................................................................... 262
3.12.6 Leverage ESX thin provisioning and Celerra Virtual
Provisioning........................................................................ 263
3.12.7 Virtual storage expansion using Celerra storage 265
3.13 Storage multipathing........................................................ 278
3.13.1 Configure VMware NMP with Celerra iSCSI and the
ESX iSCSI software initiator............................................. 278
3.13.2 Multipathing using Microsoft iSCSI Initiator and
Celerra iSCSI inside a Windows guest OS..................... 284
3.13.3 Scaling bandwidth of NAS datastores on Celerra
NFS....................................................................................... 292
3.13.4 VMware vSphere configuration with Celerra iSCSI
using PowerPath/VE........................................................ 298
3.14 VMware Resiliency........................................................... 315
3.14.1 The rationale for VMware Resiliency.................. 315
3.14.2 EMC recommendations for VMware Resiliency with
Celerra................................................................................. 315
3.14.3 Install appropriate SCSI drivers........................... 316
3.14.4 Summary for VMware Resiliency with Celerra. 319
3.14.5 Considerations for Windows virtual machines.. 319
3.14.6 Considerations for Linux virtual machines........ 320
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Using EMC Celerra Storage with VMware vSphere and VMware Infrastructure
3.14.7 Upgrade LSI Logic Parallel drivers to
LSI Logic Storport drivers................................................ 321
3.14.8 Using paravirtual drivers in vSphere 4
environments...................................................................... 333
Chapter 4 Cloning Virtual Machines
4.1 Introduction......................................................................... 348
4.2 Cloning methodologies...................................................... 349
4.2.1 Clone Virtual Machine wizard in vCenter Server 349
4.2.2 VMware vCenter Converter.................................... 352
4.3 Cloning virtual machines by using Celerra-based
technologies............................................................................... 353
4.3.1 Clone virtual machines over NAS datastores using
Celerra SnapSure............................................................... 354
4.3.2 Clone virtual machines over iSCSI/vStorage VMFS
datastores using iSCSI snapshots.................................... 355
4.3.3 Clone virtual machines over iSCSI or RDM volumes
by using iSCSI snapshots.................................................. 357
4.4 Celerra-based cloning with Virtual Provisioning........... 359
4.4.1 Clone virtual machines over NAS using SnapSure
and Virtual Provisioning.................................................. 359
4.4.2 Clone virtual machines over VMFS or RDM using
iSCSI snapshot and Virtual Provisioning....................... 360
4.5 Conclusion........................................................................... 363
Chapter 5 Backup and Restore of Virtual Machines
5.1 Backup and recovery options............................................ 366
5.2 Recoverable as compared to restartable copies of data. 367
5.2.1 Recoverable disk copies........................................... 367
5.2.2 Restartable disk copies............................................. 367
5.3 Virtual machines data consistency................................... 369
5.4 Backup and recovery of a NAS datastore........................ 371
5.4.1 Logical backup and restore using Celerra
SnapSure............................................................................. 371
5.4.2 Logical backup and restore using Replication
Manager.............................................................................. 373
5.4.3 Physical backup and restore using the nas_copy
command............................................................................ 376
5.4.4 Physical backup and restore using Celerra NDMP
and NetWorker.................................................................. 376
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Using EMC Celerra Storage with VMware vSphere and VMware Infrastructure
5.4.5 Physical backup and restore using Celerra
Replicator............................................................................ 378
5.4.6 Physical backup and restore using Replication
Manager............................................................................... 378
5.5 Backup and recovery of a vStorage VMFS datastore over
iSCSI............................................................................................ 382
5.5.1 Logical backup and restore using Celerra iSCSI
snapshots............................................................................. 382
5.5.2 Logical backup and restore using Replication
Manager............................................................................... 384
5.5.3 Physical backup and restore using Celerra
Replicator............................................................................ 385
5.5.4 Physical backup and restore using Replication
Manager............................................................................... 387
5.6 Backup and recovery of an RDM volume over iSCSI.... 388
5.7 Backup and recovery using VCB...................................... 389
5.8 Backup and recovery using VCB and EMC Avamar..... 395
5.9 Backup and recovery using VMware Data Recovery.... 398
5.10 Virtual machine single file restore from a Celerra
checkpoint.................................................................................. 401
5.11 Other file-level backup and restore alternatives........... 404
5.12 Summary............................................................................ 406
Chapter 6 Using VMware vSphere and VMware Virtual
Infrastructure in Disaster Restart Solutions
6.1 Overview.............................................................................. 410
6.2 Definitions............................................................................ 411
6.2.1 Dependent-write consistency.................................. 411
6.2.2 Disaster restart........................................................... 411
6.2.3 Disaster recovery....................................................... 412
6.2.4 Roll-forward recovery.............................................. 412
6.3 Design considerations for disaster recovery and disaster
restart.......................................................................................... 413
6.3.1 Recovery point objective.......................................... 413
6.3.2 Recovery time objective........................................... 413
6.3.3 Operational complexity............................................ 414
6.3.4 Source server activity............................................... 415
6.3.5 Production impact.................................................... 415
6.3.6 Target server activity................................................ 415
6.3.7 Number of copies of data......................................... 415
6.3.8 Distance for the solution.......................................... 416
6.3.9 Bandwidth requirements......................................... 416
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Using EMC Celerra Storage with VMware vSphere and VMware Infrastructure
6.3.10 Federated consistency............................................ 416
6.3.11 Testing the solution................................................ 417
6.3.12 Cost........................................................................... 417
6.4 Geographically distributed virtual infrastructure......... 419
6.5 Business continuity solutions............................................ 420
6.5.1 NAS datastore replication....................................... 420
6.5.2 VMFS datastore replication over iSCSI................. 435
6.5.3 RDM volume replication over iSCSI...................... 446
6.5.4 Site failover over NFS and iSCSI using VMware SRM
and Celerra......................................................................... 446
6.5.5 Site failback over NFS and iSCSI using VMware
vCenter SRM 4 and EMC Celerra Failback Plug-in for
VMware vCenter SRM...................................................... 449
6.6 Summary.............................................................................. 453
Appendix A CLARiiON Back-End Array Configuration for Celerra
Unified Storage
A.1 Back-end CLARiiON storage configuration ................. 457
A.2 Present the new CLARiiON back-end configuration to
Celerra unified storage ............................................................ 468
Appendix B Windows Customization
B.1 Windows customization ................................................... 470
B.2 System Preparation tool .................................................... 471
B.3 Customization process for the cloned virtual
machines .................................................................................... 472
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Using EMC Celerra Storage with VMware vSphere and VMware Infrastructure
1 VMware vSphere architecture................................................................. 30
2 VMware vSphere data center physical topology.................................. 35
3 vNIC, vSwitch, and port groups............................................................. 36
4 VMware vNetwork Distributed Switch................................................. 38
5 VMware vSphere and VMware Infrastructure storage architecture. 39
6 Raw device mapping................................................................................. 41
7 Storage map of vSphere inventory objects............................................ 44
8 VMware vMotion...................................................................................... 45
9 Storage vMotion......................................................................................... 46
10 VMware DRS.............................................................................................. 47
11 VMware HA............................................................................................... 48
12 VMware Fault Tolerance.......................................................................... 49
13 VMware Data Recovery............................................................................ 51
14 Site Recovery Manager............................................................................. 55
15 VMware View with VMware vSphere 4................................................ 57
16 VMware vCenter Converter..................................................................... 60
17 Celerra block diagram............................................................................... 64
18 Celerra storage topology.......................................................................... 66
19 Celerra unified storage............................................................................. 68
20 Celerra gateway storage........................................................................... 69
21 Celerra Manager GUI................................................................................ 70
22 Celerra Replicator...................................................................................... 79
23 EMC Celerra Plug-in for VMware.......................................................... 83
24 Celerra Data Deduplication calculator................................................... 85
25 Celerra storage with VMware vSphere and VMware Infrastructure 89
26 Configuration roadmap............................................................................ 90
27 Storage layout............................................................................................ 99
28 Volumes.................................................................................................... 101
29 Create a stripe volume............................................................................ 102
30 New Volume............................................................................................ 103
31 File Systems.............................................................................................. 105
Figures
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Using EMC Celerra Storage with VMware vSphere and VMware Infrastructure
32 New File System...................................................................................... 106
33 Sample storage layout............................................................................. 107
34 Network Interface Properties................................................................ 115
35 Modify NFS.MaxVolumes on each ESX host...................................... 116
36 Set Net.TcpipHeapSize and Net.TcpipHeapMax parameters.......... 117
37 Configure ESX NFS heartbeat parameters........................................... 119
38 VMkernel configuration - Add Networking....................................... 121
39 Add Network Wizard - Connection Type........................................... 121
40 VMkernel - Network Access.................................................................. 122
41 Add Network Wizard - VMkernel - Connection Settings................. 123
42 Add Network Wizard - VMkernel - IP Connection Settings............ 124
43 DNS Configuration................................................................................. 125
44 Routing...................................................................................................... 126
45 Add Network Wizard - Ready to Complete....................................... 127
46 File Systems.............................................................................................. 129
47 New File System...................................................................................... 130
48 NFS Exports.............................................................................................. 131
49 NFS Export Properties............................................................................ 132
50 Add Storage.............................................................................................. 133
51 Add Storage - Select Storage Type........................................................ 134
52 Add Storage - Locate Network File System........................................ 135
53 Add Storage - Network File System..................................................... 136
54 Security Profile......................................................................................... 140
55 Firewall Properties.................................................................................. 141
56 Storage Adapters..................................................................................... 142
57 iSCSI Initiator Properties........................................................................ 142
58 General Properties................................................................................... 143
59 Add Send Target Server......................................................................... 144
60 iSCSI Initiator Properties - Dynamic Discovery................................. 145
61 Wizards - Select a Wizard...................................................................... 146
62 New iSCSI Lun Wizard.......................................................................... 147
63 Select/Create Target............................................................................... 148
64 Select/Create File System...................................................................... 149
65 Enter LUN Info........................................................................................ 150
66 LUN Masking........................................................................................... 151
67 Overview/Results................................................................................... 152
68 Storage Adapters..................................................................................... 153
69 Rescan....................................................................................................... 154
70 Storage Adapters..................................................................................... 155
71 Storage Adapters - Properties................................................................ 155
72 iSCSI Initiator Properties........................................................................ 156
73 General Properties................................................................................... 157
74 iSCSI Initiator Properties - Dynamic Discovery................................. 158
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Using EMC Celerra Storage with VMware vSphere and VMware Infrastructure
75 Add Send Target Server......................................................................... 159
76 Wizards - Select a Wizard...................................................................... 160
77 Remove from Inventory option............................................................. 162
78 Datastores................................................................................................. 163
79 Datastores - Delete................................................................................... 163
80 iSCSI Target Properties - Target............................................................ 164
81 iSCSi Target Properties - LUN Mask.................................................... 165
82 Networking.............................................................................................. 166
83 iSCSi Initiator Properties........................................................................ 167
84 iSCSi Initiator Properties - Discovery................................................... 168
85 Add Target Portal.................................................................................... 169
86 iSCSI Initiator Properties - Target portal added................................. 169
87 iSCSI Initiator Properties - Targets....................................................... 170
88 Log On to Target...................................................................................... 171
89 Advanced Settings................................................................................... 172
90 iSCSI Initiator Properties - Targets....................................................... 173
91 Datastores................................................................................................. 174
92 Add Storage - Select Storage Type........................................................ 175
93 Add Storage - Select Disk/LUN............................................................ 176
94 Add Storage - Select VMFS Mount Options........................................ 177
95 Add Storage - Current Disk Layout...................................................... 179
96 Add Storage - Properties........................................................................ 180
97 Add Storage - Disk/LUN - Formatting................................................ 180
98 Add Storage - Ready to Complete........................................................ 181
99 New Virtual Machine option................................................................. 183
100 Create New Virtual Machine................................................................. 184
101 Create New Virtual Machine - Name and Location........................... 185
102 Create New Virtual Machine - Datastore............................................. 186
103 Create New Virtual Machine - Virtual Machine Version.................. 187
104 Create New Virtual Machine - Guest Operating System................... 188
105 Create New Virtual Machine - CPUs.................................................... 189
106 Create New Virtual Machine - Memory............................................... 190
107 Create New Virtual Machine - Network.............................................. 191
108 Create New Virtual Machine - SCSI Controller.................................. 192
109 Create New Virtual Machine - Select a Disk....................................... 193
110 Create New Virtual Machine - Select a Disk....................................... 194
111 Create New Virtual Machine - Create a Disk...................................... 195
112 Create New Virtual Machine - Advanced Options............................ 196
113 Create New Virtual Machine - Ready to Complete............................ 197
114 Edit Settings.............................................................................................. 198
115 Virtual Machine Properties.................................................................... 199
116 Add Hardware......................................................................................... 200
117 Add Hardware - Select a Disk............................................................... 201
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Using EMC Celerra Storage with VMware vSphere and VMware Infrastructure
118 Add Hardware - Select and Configure a Raw LUN........................... 202
119 Add Hardware - Select a Datastore...................................................... 202
120 Add Hardware - Advanced Options.................................................... 203
121 Add Hardware - Ready to Complete................................................... 204
122 Create a Storage Pool.............................................................................. 206
123 Create Storage Pool................................................................................. 207
124 Disk Selection........................................................................................... 208
125 Create LUNs from a RAID group......................................................... 209
126 Create LUN.............................................................................................. 210
127 Confirm: Create LUN............................................................................. 210
128 Message: Create LUN - LUN created successfully............................. 211
129 Create Storage Group............................................................................. 212
130 Create Storage Group............................................................................. 212
131 Confirm: Create Storage Group............................................................ 213
132 Success: Create Storage Group.............................................................. 213
133 Connect Hosts.......................................................................................... 214
134 Select a host for the storage group........................................................ 215
135 Confirm the connected host................................................................... 215
136 Connect Host operation succeeded...................................................... 216
137 Select LUNs for the storage group........................................................ 217
138 Select LUNs.............................................................................................. 218
139 Confirm addition of LUNs to the storage group................................ 219
140 Successful addition of LUNs to the storage group............................. 219
141 Rescan FC adapter................................................................................... 220
142 Rescan dialog box.................................................................................... 220
143 FC LUN added to the storage................................................................ 221
144 Command prompt - diskpart................................................................ 224
145 Select the disk........................................................................................... 224
146 Create a partition with a 1 MB disk boundary.................................... 224
147 Computer Management......................................................................... 225
148 NTFS data partition alignment (Windows system Information)..... 227
149 NTFS data partition alignment (wmic command)............................. 228
150 Allocation unit size of a formatted NTFS data partition................... 228
151 Output for a Linux partition aligned to a 1 MB disk boundary (starting
sector 2048).................................................................................................229
152 Output for an unaligned Linux partition (starting sector 63)........... 229
153 Edit Virtual Machine Swapfile Location.............................................. 231
154 Virtual Machine Swapfile Location...................................................... 232
155 List of datastores...................................................................................... 233
156 Advanced Settings................................................................................... 234
157 Mem.Host.LocalSwapDirEnabled parameter..................................... 235
158 Mem.Host.LocalSwapDir parameter.................................................... 236
159 Edit DWORD Value................................................................................ 237
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Using EMC Celerra Storage with VMware vSphere and VMware Infrastructure
160 Edit Settings for the virtual machine.................................................... 239
161 Virtual Machine Properties.................................................................... 240
162 Add Hardware......................................................................................... 240
163 Select a Disk.............................................................................................. 241
164 Create a Disk............................................................................................ 242
165 Advanced Options................................................................................... 243
166 Ready to Complete.................................................................................. 244
167 Change the SCSI controller type........................................................... 244
168 Change SCSI Controller Type................................................................ 245
169 Virtual Machine Properties.................................................................... 246
170 Disk Management.................................................................................... 247
171 Notifications............................................................................................. 249
172 New Notification: Storage Projection................................................... 250
173 Storage Usage........................................................................................... 251
174 Notifications page.................................................................................... 252
175 New Notification: Storage Projection................................................... 253
176 Notifications page.................................................................................... 254
177 List of Datastores..................................................................................... 255
178 General tab................................................................................................ 255
179 Alarm settings.......................................................................................... 256
180 Actions tab................................................................................................ 257
181 Create virtually provisioned NFS file system..................................... 258
182 NAS datastore in vCenter Server.......................................................... 259
183 Creating the virtually provisioned iSCSI LUN................................... 261
184 iSCSI VMFS datastore in vCenter Server............................................. 262
185 Virtual machines provisioned............................................................... 264
186 Create a Disk............................................................................................ 265
187 File Systems.............................................................................................. 266
188 Extend File System.................................................................................. 267
189 Auto Extend Enabled.............................................................................. 268
190 iSCSI LUN expansion.............................................................................. 269
191 Extend iSCSI LUN................................................................................... 270
192 Configuration tab..................................................................................... 271
193 Data capacity............................................................................................ 271
194 iSCSI datastore expansion...................................................................... 272
195 Additional available space..................................................................... 273
196 iSCSI datastore expansion...................................................................... 273
197 Test Properties.......................................................................................... 274
198 Increase Datastore Capacity................................................................... 274
199 Disk Layout.............................................................................................. 275
200 Extent Size................................................................................................. 275
201 Ready to complete page.......................................................................... 276
202 Add Extent in VMware Infrastructure................................................. 277
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Using EMC Celerra Storage with VMware vSphere and VMware Infrastructure
203 iSCSI Target Properties........................................................................... 280
204 LUN Mask................................................................................................ 280
205 vSwitch configuration............................................................................. 281
206 Rescan....................................................................................................... 282
207 Properties.................................................................................................. 282
208 iSCSI_ppve Properties............................................................................ 283
209 iSCSI Disk Manage Paths....................................................................... 284
210 iSCSI Target Properties........................................................................... 286
211 LUN Mask................................................................................................ 286
212 vSwitches.................................................................................................. 287
213 iSCSI Initiator Properties........................................................................ 288
214 Discovery.................................................................................................. 289
215 Log On to Target...................................................................................... 290
216 Advanced Settings................................................................................... 290
217 Advanced Settings................................................................................... 291
218 Target Properties..................................................................................... 291
219 Device Details.......................................................................................... 292
220 Network page.......................................................................................... 293
221 New Network Device............................................................................. 294
222 Interfaces................................................................................................... 295
223 New Network Interface.......................................................................... 295
224 Create a VMkernel port.......................................................................... 296
225 vSwitch3 Properties................................................................................ 297
226 vSwitch3 Properties................................................................................ 297
227 Celerra Data Mover interfaces............................................................... 298
228 PowerPath architecture.......................................................................... 299
229 Claim rule to ESX server........................................................................ 300
230 Kernel and esx conf................................................................................. 300
231 Rescan the ESX host................................................................................ 301
232 iSCSI Target Properties........................................................................... 302
233 LUN Mask................................................................................................ 302
234 Storage Adapters..................................................................................... 303
235 Storage....................................................................................................... 304
236 Add Storage wizard................................................................................ 304
237 Select Disk/LUN..................................................................................... 305
238 Current Disk Layout............................................................................... 305
239 Ready to Complete.................................................................................. 306
240 vCenter Server storage configuration.................................................. 307
241 iSCSI_ppve Properties............................................................................ 307
242 iSCSI Disk Manage Paths....................................................................... 308
243 PowerPath................................................................................................ 308
244 iSCSI Target Properties........................................................................... 309
245 vSwitches.................................................................................................. 310
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Using EMC Celerra Storage with VMware vSphere and VMware Infrastructure
246 iSCSI Target Properties........................................................................... 310
247 Rescan........................................................................................................ 311
248 Add a new iSCSI LUN to the ESX host................................................ 312
249 iSCSI_ppve Properties............................................................................ 313
250 iSCSI Disk Manage Paths....................................................................... 314
251 Windows virtual machines system event viewer............................... 317
252 Upgrade the LSI Logic PCI-X Ultra 320 driver................................... 322
253 Hardware Update Wizard...................................................................... 323
254 Install software......................................................................................... 324
255 Select device driver from a list............................................................... 325
256 Select the device driver........................................................................... 326
257 Install from Disk...................................................................................... 326
258 Locate File................................................................................................. 327
259 Select device driver................................................................................. 328
260 Completing the Hardware Update Wizard......................................... 329
261 ESX host.................................................................................................... 330
262 Datastore Browser................................................................................... 330
263 Configuration file.................................................................................... 331
264 Update virtual machine file configuration.......................................... 332
265 LSI Storport drivers are upgraded successfully.................................. 333
266 Virtual Machine Properties.................................................................... 334
267 Browse Datastores................................................................................... 335
268 Virtual Machine Properties.................................................................... 336
269 Install the third-party driver.................................................................. 337
270 Select VMware PVSCSI Controller....................................................... 338
271 Virtual Machine Properties.................................................................... 339
272 Select Hard Disk...................................................................................... 340
273 Select a Disk.............................................................................................. 341
274 Create a Disk............................................................................................ 342
275 Advanced Options................................................................................... 343
276 Ready to Complete.................................................................................. 344
277 Virtual Machine Properties.................................................................... 345
278 Change SCSI Controller Type................................................................ 346
279 Clone Virtual Machine wizard.............................................................. 349
280 Host/Cluster............................................................................................ 350
281 Datastore................................................................................................... 350
282 Disk Format.............................................................................................. 351
283 Guest Customization............................................................................... 351
284 Ready to Complete.................................................................................. 352
285 Create a writeable checkpoint for NAS datastore.............................. 354
286 Promote a snapshot................................................................................. 355
287 Assign a new signature option.............................................................. 357
288 File system usage on Celerra Manager................................................. 360
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Using EMC Celerra Storage with VMware vSphere and VMware Infrastructure
289 Parameter setting using Celerra Manager........................................... 362
290 Checkpoint creation in Celerra Manager GUI 5.6.............................. 371
291 ShowChildFsRoot Server Parameter Properties in Celerra Manager 372
292 Datastore Browser view after checkpoints are visible....................... 372
293 Job Wizard................................................................................................ 373
294 Restoring the datastore replica from Replication Manager.............. 374
295 Replica Properties in Replication Manager......................................... 375
296 Read-only copy of the datastore view in the vSphere client............. 376
297 NDMP recovery using EMC NetWorker............................................. 377
298 Backup with integrated checkpoint...................................................... 377
299 Mount Wizard - Mount Options........................................................... 380
300 VMFS mount options to manage snapshots........................................ 383
301 Celerra Manager Replication Wizard................................................... 385
302 VCB............................................................................................................ 390
303 NetWorker configuration settings for VCB......................................... 392
304 VCB backup with EMC Avamar Virtual Edition............................... 396
305 VMware Data Recovery......................................................................... 398
306 VDR backup process............................................................................... 399
307 Mapped CIFS share containing a virtual machine in the vCenter
Server......................................................................................................... 402
308 Virtual machine view from the vSphere client................................... 403
309 Registration of a virtual machine with ESX......................................... 421
310 Select a Wizard......................................................................................... 422
311 Select a Replication Type........................................................................ 423
312 File System................................................................................................ 423
313 Specify Destination Celerra Network Server...................................... 424
314 Create Celerra Network Server............................................................. 424
315 Specify Destination Credentials............................................................ 425
316 Create Peer Celerra Network Server.................................................... 425
317 Overview/Results................................................................................... 426
318 Specify Destination Celerra Network Server...................................... 426
319 Select Data Mover Interconnect............................................................ 427
320 Source Settings......................................................................................... 427
321 Specify Destination Credentials............................................................ 428
322 Destination Settings................................................................................ 428
323 Overview/Results................................................................................... 429
324 Select Data Mover Interconnect............................................................ 429
325 Select Replication Session's Interface.................................................... 430
326 Select Source............................................................................................. 430
327 Select Destination.................................................................................... 431
328 Update Policy........................................................................................... 431
329 Select Tape Transport............................................................................. 432
330 Overview/Results................................................................................... 433
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Using EMC Celerra Storage with VMware vSphere and VMware Infrastructure
331 Command Successful.............................................................................. 433
332 NFS replication using Replication Manager........................................ 434
333 Select a Wizard......................................................................................... 435
334 Select a Replication Type........................................................................ 436
335 Specify Destination Celerra Network Server...................................... 436
336 Create Celerra Network Server............................................................. 437
337 Specify Destination Credentials............................................................ 437
338 Create Peer Celerra Network Server.................................................... 438
339 Overview/Results................................................................................... 438
340 Specify Destination Celerra Network Server...................................... 438
341 Data Mover Interconnect........................................................................ 439
342 Source Settings......................................................................................... 439
343 Specify Destination Credentials............................................................ 440
344 Destination Settings................................................................................. 440
345 Overview/Results................................................................................... 441
346 Select Data Mover Interconnect............................................................. 441
347 Select Replication Session's Interface.................................................... 442
348 Select Source............................................................................................. 442
349 Select Destination.................................................................................... 443
350 Update Policy........................................................................................... 443
351 Overview/Results................................................................................... 444
352 Command Successful.............................................................................. 444
353 VMFS replication using Replication Manager.................................... 445
354 VMware vCenter SRM with VMware vSphere................................... 447
355 VMware vCenter SRM configuration................................................... 448
356 Create RAID Group option.................................................................... 457
357 Create Storage Pool................................................................................. 458
358 Disk Selection........................................................................................... 459
359 Create LUN option.................................................................................. 460
360 Create LUN............................................................................................... 461
361 Confirm: Create LUN.............................................................................. 462
362 Message: Create LUN............................................................................. 463
363 Select LUNs.............................................................................................. 464
364 Storage Group Properties....................................................................... 465
365 Confirm..................................................................................................... 466
366 Success....................................................................................................... 467
367 Disk mark.................................................................................................. 468
368 System Preparation tool.......................................................................... 472
369 Reseal option............................................................................................ 473
370 Generate new SID.................................................................................... 474
18
Using EMC Celerra Storage with VMware vSphere and VMware Infrastructure
19
Using EMC Celerra Storage with VMware vSphere and VMware Infrastructure
1 Default and recommended values of ESX NFS heartbeat
parameters................................................................................................. 118
2 SCSI driver recommendations for Windows guest OSs..................... 320
3 Linux guest OS recommendations......................................................... 321
4 Virtual machine cloning methodology comparison............................ 363
5 Backup and recovery options................................................................. 406
6 Data replication solution......................................................................... 453
Tables
20
Using EMC Celerra Storage with VMware vSphere and VMware Infrastructure
21
Using EMC Celerra Storage with VMware vSphere and VMware Infrastructure
Description Following the recent release of EMC VSI for VMware vSphere: Unified
Storage Management, EMC Celerra Plug-in for VMware is no longer
supported, and is not available for download. Therefore, customers
should use EMC VSI for VMware vSphere: Unified Storage
Management instead.
All references in this document to EMC Celerra Plug-in for VMware or
its documentation should be regarded instead as references to EMC VSI
for VMware vSphere: Unified Storage Management or its
documentation.
Affected sections References to EMC Celerra Plug-in for VMware and its documentation
in the following sections must be regarded as references to EMC VSI for
VMware vSphere: Unified Storage Management.

Section 2.5.7, “Celerra Data Deduplication,” on page 81: References
to the plug-in, including the figures.

Section 3.3, “Configuration roadmap,” on page 90: References to
the plug-in in the note.

Section 4.3, “Cloning virtual machines by using Celerra-based
technologies,” on page 353: References to the plug-in in the note.
Information on
EMC VSI for
VMware vSphere:
Unified Storage
Management
The EMC VSI for VMware vSphere: Unified Storage Management Release
Notes contain installation instructions and supplemental information.
The EMC VSI for VMware vSphere: Unified Storage Management Product
Guide contains prerequisites and best practices. These two documents
provide more information on the features of EMC VSI for VMware
vSphere: Unified Storage Management that are broader than those of
EMC Celerra Plug-in for VMware. Read both these documents
before installing EMC VSI for VMware vSphere: Unified Storage
Management.
Errata
ErrataEMC
EMC VSI for VMware vSphere: Unified Storage Management replaces
EMC Celerra Plug-in for VMware.
22
Using EMC Celerra Storage with VMware vSphere and VMware Infrastructure
Contents of the
EMC VSI for
VMware vSphere:
Unified Storage
Management
solution
The EMC VSI for VMware vSphere: Unified Storage Management
solution contains the following:

EMC VSI for VMware vSphere: Unified Storage Management 4.0 Zip file
(P/N 300-012-064)

EMC VSI for VMware vSphere: Unified Storage Management Read Me
First (P/N 300-012-099)

EMC VSI for VMware vSphere: Unified Storage Management Release
Notes (P/N 300-012-098)

EMC VSI for VMware vSphere: Unified Storage Management Product
Guide (P/N 300-012-100)
Installing EMC VSI
for VMware
vSphere: Unified
Storage
Management
EMC VSI for VMware vSphere: Unified Storage Management is
distributed as a Zip file containing a single-file installer. After you
download the Zip file from the EMC Powerlink
®
website and unzip the
file, the EMC VSI for VMware vSphere: Unified Storage Management
software can be installed. The EMC VSI for VMware vSphere: Unified
Storage Management Release Notes contain detailed installation
instructions.
23
Using EMC Celerra Storage with VMware vSphere and VMware Infrastructure
As part of an effort to improve and enhance the performance and
capabilities of its product lines, EMC periodically releases revisions of
its hardware and software. Therefore, some functions described in this
document may not be supported by all versions of the software or
hardware currently in use. For the most up-to-date information on
product features, refer to the product release notes.
Audience This TechBook describes how VMware vSphere and VMware
Infrastructure work with EMC Celerra storage systems and software
technologies. The intended audience for this TechBook is storage
administrators, system administrators, and VMware vSphere and
VMware Infrastructure administrators. This document can also be used
by individuals who are involved in acquiring, managing, or operating
EMC Celerra storage arrays and host devices.
Readers of this guide are expected to be familiar with the following
topics:

EMC Celerra system operation

EMC Celerra Manager

EMC CLARiiON

EMC Symmetrix

VMware vSphere and VMware Infrastructure operation
Note: This TechBook was previously called VMware ESX using EMC Celerra
Storage Systems.
Preface
24
Using EMC Celerra Storage with VMware vSphere and VMware Infrastructure
Related
documentation
Related documents include the following from EMC:

EMC Celerra Replicator Adapter for VMware vCenter Site Recovery
Manager Version 4.0—Release Notes

EMC Celerra Failback Plug-in for VMware vCenter Site Recovery
Manager—Release Notes

Managing EMC Celerra Volumes and File Systems with Automatic
Volume Management Technical Module

Managing EMC Celerra Volumes and File Systems Manually Technical
Module

PowerPath/VE for VMware vSphere Installation and Administration
Guide 5.4

Implementing Virtual Provisioning on EMC CLARiiON and Celerra with
VMware Virtual Infrastructure—Applied Technology white paper

EMC Infrastructure for Deploying VMware View in the Enterprise -
EMC Celerra Unified Storage Plaforms—Solution Guide

Configuring NFS on Celerra TechModule Version 5.6

Configuring iSCSI Targets on Celerra TechModule Version 5.6

Managing Celerra Volumes and File Systems with Automatic Volume
Management TechModule Version 5.6

Configuring and Managing Celerra Networking TechModule Version 5.6

Configuring and Managing Celerra Network High Availability
TechModule Version 5.6

Configuring Standbys on Celerra TechModule Version 5.6

Configuring NDMP Backups on Celerra TechModule Version 5.6

Using SnapSure on Celerra TechModule Version 5.6

Using Celerra Replicator (V2) TechModule Version 5.6

Using Celerra AntiVirus Agent Technical Module Version 5.6

Using the Celerra Data Deduplication Technical Module Version 5.6

E-Lab Interoperability Navigator utility

Using EMC CLARiiON Storage with VMware vSphere and VMware
Infrastructure TechBook
25

Using EMC Celerra Storage with VMware vSphere and VMware Infrastructure
The following related documents are from VMware:

ESX Configuration Guide - ESX 4.0 and vCenter Server 4.0

ESX Server 3 Configuration Guide Update 2 and later for ESX Server 3.5
and VirtualCenter 2.5

Recommendations for Aligning VMFS Partitions—VMware Performance
Study

SAN System—Design and Deployment Guide
Conventions used
in this document
EMC uses the following conventions for special notices.
Note: A note presents information that is important, but not hazard-related.
CAUTION
!
A caution contains information essential to avoid data loss or
damage to the system or equipment.
IMPORTANT
!
An important notice contains information essential to operation
of the software or hardware.
WARNING
A warning contains information essential to avoid a hazard that
can cause severe personal injury, death, or substantial property
damage if you ignore the warning.
DANGER
A danger notice contains information essential to avoid a hazard
that will cause severe personal injury, death, or substantial
property damage if you ignore the message.
26
Using EMC Celerra Storage with VMware vSphere and VMware Infrastructure
Typographical conventions
EMC uses the following type style conventions in this document:
Normal
Used in running (nonprocedural) text for:
• Names of interface elements (such as names of windows, dialog boxes, buttons,
fields, and menus)
• Names of resources, attributes, pools, Boolean expressions, buttons, DQL
statements, keywords, clauses, environment variables, functions, utilities
• URLs, pathnames, filenames, directory names, computer names, filenames, links,
groups, service keys, file systems, notifications
Bold
Used in running (nonprocedural) text for:
• Names of commands, daemons, options, programs, processes, services,
applications, utilities, kernels, notifications, system calls, man pages
Used in procedures for:
• Names of interface elements (such as names of windows, dialog boxes, buttons,
fields, and menus)
• What user specifically selects, clicks, presses, or types
Italic
Used in all text (including procedures) for:
• Full titles of publications referenced in text
• Emphasis (for example a new term)
• Variables
Courier Used for:
• System output, such as an error message or script
• URLs, complete paths, filenames, prompts, and syntax when shown outside of
running text
Courier bold Used for:
• Specific user input (such as commands)
Courier italic Used in procedures for:
• Variables on command line
• User input variables
< >
Angle brackets enclose parameter or variable values supplied by the user
[ ]
Square brackets enclose optional values
|
Vertical bar indicates alternate selections - the bar means “or”
{ }
Braces indicate content that you must specify (that is, x or y or z)
...
Ellipses indicate nonessential information omitted from the example
27

Using EMC Celerra Storage with VMware vSphere and VMware Infrastructure
The team that wrote this TechBook
This TechBook was authored by a team from Unified Storage Solutions
based at Research Triangle Park in North Carolina.
The main author is Yossi Mesika. Yossi has 15 years of experience in
software engineering in the areas of virtualization, network-attached
storage, and databases.
Additional contributors to this TechBook are:

Saranya Balasundaram

Venkateswara Rao Etha

Bala Ganeshan - Symmetrix Partner Engineering

John Jom

Sheetal Kochavara - USD Corporate Systems Engineering

Vivek Srinivasa
We'd like to hear from you!
Your feedback on our TechBooks is important to us! We want our books
to be as helpful and relevant as possible, so please feel free to send us
your comments, opinions and thoughts on this or any other TechBook:
TechBooks@emc.com
28
Using EMC Celerra Storage with VMware vSphere and VMware Infrastructure
Top five optimization recommendations

When using EMC Celerra storage with VMware vSphere or VMware
Infrastructure, consider the following key optimization
recommendations. Nevertheless, this list does not replace the need to
review the various recommendations that are included in this
document.
Virtual machines alignment —Follow the guidelines for virtual
machines alignment when deploying virtual machines on Celerra
storage (NFS and iSCSI). This guideline includes partition alignment,
and for Windows virtual machines, adjustment of the NTFS allocation
unit size. Section 3.10.1, “Virtual machine disk partitions alignment,”
on page 222 provides more details.
Uncached write mechanism for Celerra NFS —When deploying
virtual machines on Celerra NFS storage, it is recommended to enable
the uncached write mechanism because it can improve the overall
virtual machine performance. Section 3.6.1.1, “Celerra uncached write
mechanism,” on page 109 provides more details.
VMware resiliency with Celerra storage —Follow the guidelines for
VMware resiliency with Celerra. This includes settings in ESX, in the
virtual machines, and in the guest operation systems. This would allow
the virtual machines to better withstand Celerra events such as Data
Mover reboot and Data Mover failover. Section 3.14, “VMware
Resiliency,” on page 315 provides more details.
VMware multipathing and failover with Celerra storage —Follow
the guidelines for I/O multipathing when using Celerra with VMware
vSphere or VMware Infrastructure. This can improve the overall
performance and resource utilization of the virtual data center. Section
3.13, “Storage multipathing,” on page 278 provides more details.
ESX thin provisioning and Celerra Virtual Provisioning —With
VMware vSphere and VMware Infrastructure, leverage Celerra Virtual
Provisioning for better storage utilization. In addition to this, use ESX
thin provisioning with VMware vSphere. This can improve the overall
storage utilization. Section 3.11.1, “Celerra file system notification,” on
page 248 provides more details.
29
Introduction to VMware Technology
This chapter presents these topics:

1.1 VMware vSphere and VMware Infrastructure virtualization
platforms................................................................................................. 30

1.2 VMware vSphere and VMware Infrastructure data centers...... 34

1.3 Distributed services in VMware vSphere and VMware
Infrastructure.......................................................................................... 45

1.4 Backup and recovery solutions with VMware vSphere and
VMware Infrastructure......................................................................... 50

1.5 VMware vCenter Site Recovery Manager.................................... 54

1.6 VMware View................................................................................... 57

1.7 VMware vCenter Converter........................................................... 60
Introduction to VMware
Technology
1
30
Using EMC Celerra Storage with VMware vSphere and VMware Infrastructure
1.1 VMware vSphere and VMware Infrastructure virtualization
platforms
VMware vSphere and VMware Infrastructure are two virtualization
platforms from VMware. VMware Infrastructure 3.5 is the previous
major release of the platform, whereas VMware vSphere 4 is the next
generation of the platform that VMware recently released. VMware
vSphere and VMware Infrastructure virtualization platforms consist of
various components including ESX/ESXi hosts and VMware vCenter
Server. In addition, VMware vSphere and VMware Infrastructure offer
a set of services like distributed resource scheduling, high availability,
and backup. The relationship between the various components within
the VMware vSphere platform is shown in Figure 1 on page 30.
Figure 1
VMware vSphere architecture
31

VMware vSphere and VMware Infrastructure virtualization platforms
ESX and ESXi — ESX and ESXi are the foundation to deliver
virtualization-based distributed services to IT environments. As a core
building block of VMware vSphere and VMware Infrastructure, both
ESX and ESXi form a production-proven virtualization layer that
abstracts processor, memory, storage, and networking resources into
multiple virtual machines running side-by-side on the same physical
server. Sharing hardware resources across a large number of virtual
machines increases hardware utilization and decreases capital and
operating costs.
The two versions of ESX available are:

VMware ESX — Contains a built-in service console, which is
installed as the first component and is used to bootstrap the ESX
server installation. Using a command line interface, the service
console can then be used to configure ESX. ESX is available as an
installable DVD-ROM boot image. The service console is a virtual
machine consisting of a Red Hat Linux kernel. It runs inside the ESX
server and can be used to run local commands or scripts agents
within it.

VMware ESXi — VMware ESXi does not contain a service console.
It is available in two forms: VMware ESXi Embedded and VMware
ESXi Installable. ESXi Embedded is a firmware that is built into a
server's physical hardware or as an internal USB drive. ESXi
Installable is a software that is available as an installable CD-ROM
boot image. The ESXi Installable software can be installed on a
server's hard drive or on an external USB drive.
vCenter Server — vCenter Server delivers centralized management,
operational automation, resource optimization, and high availability to
IT environments. Virtualization-based distributed services provided by
vMotion, VMware Distributed Resource Scheduler (DRS), and VMware
High Availability (HA) equip the dynamic data center with
unprecedented levels of serviceability, efficiency, and reliability.
Automated resource optimization with VMware DRS aligns available
resources with predefined business priorities while streamlining
labor-intensive and resource-intensive operations. Migration of live
virtual machines with vMotion makes the maintenance of IT
environments nondisruptive. VMware HA enables cost-effective
application availability independent of hardware and operating
systems.
VMware Virtual Machine — A virtual machine is a representation of a
physical machine by software. A virtual machine as an entity exists as a
series of files on the disk. For example, there is a file for the hard drives,
32
Using EMC Celerra Storage with VMware vSphere and VMware Infrastructure
a file for memory swap space, and for virtual machine configuration. A
virtual machine has its own set of virtual hardware (such as RAM, CPU,
NIC, and hard disks) upon which an operating system and an
application is loaded. The operating system sees a consistent and
normalized set of hardware regardless of the actual physical hardware
components. VMware virtual machines use advanced hardware
features such as 64-bit computing and virtual symmetric
multiprocessing.
VMware vSphere Client and VMware Infrastructure Client —
Interfaces that allow administrators and users to connect remotely to
vCenter Server or ESX/ESXi from any Windows machine.
VMware vSphere Web Access and VMware Infrastructure Web
Access — Web interfaces for virtual machine management and remote
console access.
Some of the optional components of VMware vSphere 4 and VMware
Infrastructure are:
VMware vMotion — VMware vMotion enables the live migration of
running virtual machines from one physical server to another.
VMware Storage vMotion — Storage vMotion enables the migration of
virtual machine files from one datastore to another, even across storage
arrays, without service interruption.
VMware High Availability (HA) —VMware HA provides high
availability for applications running on virtual machines. In the event
of a server failure, affected virtual machines are automatically restarted
on other production servers with spare capacity.
VMware Distributed Resource Scheduler (DRS) —VMware DRS
leverages vMotion to dynamically allocate and balance computing
capacity across a collection of hardware resources aggregated into
logical resource pools.
VMware Fault Tolerance (FT) — When VMware FT is enabled for a
virtual machine, a secondary copy of the original (or primary) virtual
machine is created in the same data center. All actions completed on the
primary virtual machine are also applied to the secondary virtual
machine. If the primary virtual machine becomes unavailable, the
secondary machine becomes active and provides continuous
availability. VMware Fault Tolerance is unique to VMware vSphere.
vNetwork Distributed Switch — This feature, which is also unique to
VMware vSphere, includes a distributed virtual switch, which is
created and maintained by vCenter Server and spans many ESX/ESXi
33

VMware vSphere and VMware Infrastructure virtualization platforms
hosts, enabling significant reduction of ongoing network maintenance
activities and increasing network capacity. This allows virtual machines
to maintain consistent network configuration and advanced network
features and statistics as they migrate across multiple hosts.
VMware Consolidated Backup (VCB) — This feature provides a
centralized facility for agent-free backup of virtual machines with
VMware Infrastructure. It simplifies backup administration and
reduces the impact of backups on ESX/ESXi performance.
VMware Data Recovery — A backup and recovery product for
VMware vSphere environments that provides quick and complete data
protection for virtual machines. VMware Data Recovery is a disk-based
solution that is built on the VMware vStorage API for data protection
and is fully integrated with vCenter Server.
Pluggable Storage Architecture (PSA) — A modular partner plug-in
storage architecture that enables greater array certification flexibility
and improved array-optimized performance. PSA is a multipath I/O
framework that allows storage partners to enable array compatibility
asynchronously to ESX release schedules. VMware partners can deliver
performance-enhancing multipath load-balancing behaviors that are
optimized for each array.
VMware vSphere Software Development Kit (SDK) and VMware
Infrastructure SDK — SDKs that provide a standard interface for
VMware and third-party solutions to access VMware vSphere and
VMware Infrastructure.
vStorage APIs for data protection — This API leverages the benefits of
Consolidated Backup and makes it significantly easier to deploy, while
adding several new features that deliver efficient and scalable backup
and restore of virtual machines.
Like Consolidated Backup, this API offloads backup processing from
ESX servers, thus ensuring that the best consolidation ratio is delivered,
without disrupting applications and users. This API enables backup
tools to directly connect the ESX servers and the virtual machines
running on them, without any additional software installation. The API
enables backup tools to do efficient incremental, differential, and
full-image backup and restore of virtual machines.
34
Using EMC Celerra Storage with VMware vSphere and VMware Infrastructure
1.2 VMware vSphere and VMware Infrastructure data centers
VMware vSphere and VMware Infrastructure virtualize the entire IT
infrastructure including servers, storage, and networks. VMware
vSphere and VMware Infrastructure aggregate these resources and
present a uniform set of elements in the virtual environment. With
VMware vSphere and VMware Infrastructure, IT resources can be
managed like a shared utility and resources can be dynamically
provisioned to different business units and projects.
A typical VMware vSphere or VMware Infrastructure data center
consists of basic physical building blocks such as x86 virtualization
servers, storage networks and arrays, IP networks, a management
server, and desktop clients.
The physical topology of a VMware vSphere data center is illustrated in
Figure 2 on page 35.
35

VMware vSphere and VMware Infrastructure data centers
Figure 2
VMware vSphere data center physical topology
36
Using EMC Celerra Storage with VMware vSphere and VMware Infrastructure
Network architecture
The virtual environment provides similar networking elements as the
physical world: virtual network interface cards (vNIC), virtual switches
(vSwitch), and port groups. VMware vSphere introduced a new type of
switch architecture, called vNetwork Distributed Switch, that expands
this network architecture.
The network architecture is depicted in Figure 3.
Figure 3
vNIC, vSwitch, and port groups
Like a physical machine, each virtual machine has one or more vNICs.
The guest operating system and applications communicate with the
vNIC through a standard device driver or a VMware optimized device
driver in the same way as a physical NIC. Outside the virtual machine,
the vNIC has its own MAC address and one or more IP addresses, and
responds to the standard Ethernet protocol in the same way as a
physical NIC. An outside agent cannot detect that it is communicating
with a virtual machine.
VMware vSphere 4 offers two types of switch architecture: vSwitch and
vNetwork Distributed Switch. A vSwitch works like a layer 2 physical
switch. Each ESX host has its own vSwitch. One side of the vSwitch has
port groups that connect to virtual machines. The other side has uplink
connections to physical Ethernet adapters on the server where the
37

VMware vSphere and VMware Infrastructure data centers
vSwitch resides. Virtual machines connect to the outside world through
the physical Ethernet adapters that are connected to the vSwitch
uplinks. A vSwitch can connect its uplinks to more than one physical
Ethernet adapter to enable NIC teaming. With NIC teaming, two or
more physical adapters can be used to share the traffic load or provide
passive failover in the event of a physical adapter hardware failure or a
network outage. With VMware Infrastructure, only vSwitch is
available.
Port group is a unique concept in the virtual environment. A port group
is a mechanism for setting policies that govern the network connected
to it. A vSwitch can have multiple port groups. Instead of connecting to
a particular port on the vSwitch, a virtual machine connects its vNIC to
a port group. All virtual machines that connect to the same port group
belong to the same network inside the virtual environment, even if they
are on different physical servers.
The vNetwork Distributed Switch is a distributed network switch that
spans many ESX hosts and aggregates networking to a centralized
cluster level. Therefore, vNetwork Distributed Switches are available at
the data center level of the vCenter Server inventory. vNetwork
Distributed Switches abstract configuration of individual virtual
switches and enables centralized provisioning, administration, and
monitoring through VMware vCenter Server. Figure 4 on page 38
illustrates a vNetwork Distributed Switch that spans between ESX
server hosts.
38
Using EMC Celerra Storage with VMware vSphere and VMware Infrastructure
Figure 4
VMware vNetwork Distributed Switch
Storage architecture
The VMware vSphere and VMware Infrastructure storage architecture
consists of abstraction layers to manage the physical storage
subsystems. The key layer in the architecture is the datastores layer.
Figure 5 on page 39 shows the storage architecture.
39

VMware vSphere and VMware Infrastructure data centers
Figure 5
VMware vSphere and VMware Infrastructure storage architecture
A datastore is like a storage appliance that allocates storage space for
virtual machines across multiple physical storage devices. The
datastore provides a model to allocate storage space to the individual
virtual machines without exposing them to the complexity of the
physical storage technologies, such as Fibre Channel SAN, iSCSI SAN,
direct-attached storage, or NAS.
40
Using EMC Celerra Storage with VMware vSphere and VMware Infrastructure
A virtual machine is stored as a set of files in a datastore directory. A
virtual disk, inside each virtual machine, is also a set of files in the
directory. Therefore, operations such as copy, move, and backup can be
performed on a virtual disk just like with a file. New virtual disks can
be hot-added to a virtual machine without powering it down. In such a
case, either a virtual disk file (.vmdk) is created in a datastore to
provide new storage space for the hot-added virtual disk or an existing
virtual disk file is added to a virtual machine.
The two types of datastores available in this storage architecture are
vStorage VMFS and NAS. A VMFS datastore is a clustered file system
built across one or more physical volumes (LUNs) originating from
block storage systems. A NAS datastore is a NFS volume on a file
storage system. In this case, the storage is managed entirely by the file
storage system.
VMFS datastores can span multiple physical storage subsystems. A
single VMFS volume can contain one or more LUNs from a local SCSI
disk array on a physical host, a Fibre Channel SAN disk farm, or an
iSCSI SAN disk farm. New LUNs added to any of the physical storage
subsystems are detected and can be made available to all existing or
new datastores. The storage capacity on a previously created VMFS
datastore (volume) can be hot-extended by adding a new physical LUN
from any of the storage subsystems that are visible to it as long as the
VMFS volume extent has not reached the 2 TB minus 1 MB limit.
Alternatively, a VMFS volume can be extended (Volume Grow) within
the same LUN. With VMware vSphere, this can be done without
powering off physical hosts or storage subsystems. If any of the LUNs
(except for the LUN which has the first extent of the spanned volume)
within a VMFS volume fails or becomes unavailable, only virtual
machines that interact with that LUN are affected. All other virtual
machines with virtual disks residing in other LUNs continue to
function as normal.
Furthermore, a VMFS datastore can be configured to be mapped to a
physical volume on a block storage system. To achieve this, the
datastore can be configured with virtual disks that map to a physical
volume on a block storage system. This functionality of vStorage VMFS
is called Raw Device Mapping (RDM). RDM is illustrated in Figure 6 on
page 41.
41

VMware vSphere and VMware Infrastructure data centers
Figure 6
Raw device mapping
With RDM functionality, a virtual machine can be given direct access to
a physical LUN in the storage system. This is helpful in various use
cases in which the guest OS or the applications within the virtual
machine require direct access to the physical volume. One example of
such a use case is a physical-to-virtual clustering between a virtual
machine and a physical server.
42
Using EMC Celerra Storage with VMware vSphere and VMware Infrastructure
New VMware vSphere 4 storage-related features
The key storage-related features that are new and available with
VMware vSphere 4 are:

Virtual disk thin provisioning — VMware vSphere offers an
option to create thin provisioned virtual disks when deploying or
migrating virtual machines. VMware vCenter Server has also been
updated with new management screens and capabilities such as
raising alerts, alarms, and improved datastore utilization reports to
enable the management of over-provisioned datastores. Virtual disk
thin provisioning increases the efficiency of storage utilization for
virtualization environments by using only the amount of
underlying storage resources needed for that virtual disk. In the
past, thin provisioning was the default format for only virtual disks
created on NAS datastores in VMware Infrastructure. However,
VMware has integrated the management of virtual disk thin
provisioning and now fully supports this format for all virtual disks
with the release of vSphere. Virtual disk thin provisioning should
not be confused with thin provisioning capabilities that an array
vendor might offer. In fact, with vSphere, it is even possible to thin
provision a virtual disk at the datastore level that resides on a thinly
provisioned device on the storage array.

Storage vMotion — This technology performs the migration of the
virtual machine while the virtual machine is active. With VMware
vSphere, Storage vMotion can be administered through vCenter
Server and works across all storage protocols including NFS (in
addition to Fibre Channel and iSCSI). In addition, Storage vMotion
allows the user to move between different provisioning states. For
example, from a thick to thin virtual disk.

VMFS Volume Grow — VMFS Volume Grow offers a new way to
increase the size of a datastore that resides on a VMFS volume. It
complements the dynamic LUN expansion capability that exists in
many storage array offerings today. If a LUN is increased in size,
then the VMFS Volume Grow enables the VMFS volume extent to
dynamically increase in size as well (up to the standard 2 TB minus