WAN Optimization For The SME

rockyboygangNetworking and Communications

Oct 24, 2013 (3 years and 9 months ago)

142 views

N E T WOR K I N G & V P N
WAN Optimization
For The SME
Get More From Your Connection
replicating your Exchange database through
your storage system to a remote office,
then subsequently back up the Exchange
database and replicate the backup job. A
WAN optimization appliance with dedica-
tion capabilities will not have to send that
second copy of redundant data as the solu-
tion will have already seen it during the
replication job. The result is you get much
of the backup replication without using
WAN bandwidth.”
Optimization products will also provide
some sort of protocol optimization to make
the transfer more efficient. For example,
some tools will optimize CIFS, MAPI, NFS,
and other common protocols that utilize the
WAN. “While general byte-level optimiza-
tion is important, specific protocol optimi-
zation can provide an order-of-magnitude
improvement in the performance of key SME
applications beyond what can be accom-
plished by data optimization techniques,”
Ghory explains.
Donato Buccella, CTO of Certeon
(www.certeon.com), says an ideal pro-
tocol for optimization is iSCSI. “Many
SMEs are using iSCSI-based storage sys-
tems as the core of the storage infra-
structure, and many of those systems
include the ability to replicate to another
iSCSI storage system at a remote site.”
As stated earlier, DR is a key focus for
many SMEs. “By focusing on the iSCSI
protocol and optimizing it, the WAN
optimization solution can eliminate much
of the overhead associated with iSCSI,”
Buccella says.
In iSCSI replication, the packets need
to be received in the correct order—and
while a receiving storage device can do
this, most devices are inefficient. A WAN
optimization device that understands
iSCSI can do more efficient packet reor-
dering, and thus requires less bandwidth
during storage systems replication. The
net effect is that the secondary system
would be better synchronized to the pri-
mary storage system.
Increased Interest
What is sparking SME interest in WAN
optimization is the need for connectiv-
ity within data centers, as well as the cost
effectiveness and flexibility of the solu-
tions. Many remote office solutions now
provide additional services on physical
appliances, thus letting users create remote
office servers. “In the past, a remote office
had to have multiple servers in place to
be able to provide services like local print
DNS and DHCP. The ability to consolidate
multiple functions like this onto a single
remote appliance can significantly reduce
the cost of remote office IT,” says Ghory.
Another aspect that makes WAN
optimization more attractive to SMEs
is the fact solutions are now available
as virtual appliances. WAN optimiza-
tion solutions are now available as vir-
tual appliances. “An important change
in WAN optimization that the SME IT
manager should be aware of is the move
from using physical appliances to vir-
tual appliances,” says Robert MacIntyre,
vice president of business development
and marketing at NetEx (www.netex
.com). “Using a virtual appliance . . .
drives down physical cost and makes
implementation easier since there is
nothing to rack or provide network con-
nectivity to since it can leverage the vir-
tual infrastructure that is likely already
in place. A virtual appliance is also ideal
because it is software, there is no hard-
ware to ship and install in the local or
remote locations. A simple download
and the appliance is ready at the remote
site, as well.”
How effective WAN optimization will
be is often an unknown enterprises deal
with. IT managers are often left won-
dering whether investing in WAN opti-
mization is better than investing in more
bandwidth. Although a vendor will send
you an evaluation unit, you are still
responsible for that unit. Virtual appli-
ances provide a risk-free alternative to
testing WAN optimization.
P
by George Crump
rrr
In the past, larger enterprises have
used WAN optimization to improve
the efficiency of their WAN connec-
tions. More recently, SME managers
are beginning to use this technology,
as well. The interest in WAN optimiza-
tion is driven by SME IT staff and its
increased focus on disaster recovery,
the need to try to centralize more ser-
vices from the remote office, and also
the need to empower the remote office.
These functions all require WAN con-
nectivity—and the faster the connection,
the more successful those initiatives
become. Quite simply WAN optimiza-
tion lets users get more from their cur-
rent WAN connections.
The need for increased connectivity speed
comes from the increased focus on disaster
recovery as well as empowering the remote
office through applications. The cost of band-
width increases disproportionately with the
speed of that bandwidth. Through WAN
optimization technologies, enterprises can
improve the service level of these functions
without breaking the bank on bandwidth.
How It Works
WAN optimization products are ideal
for a number of reasons. Most apply some
level of deduplication and compression on
the data that is sent over the WAN connec-
tion. According to Riverbed Technology
(www.riverbed.com) Senior Product Mar-
keting Manager Joe Ghory, deduplication
and compression allow WAN optimiza-
tion to benefit from the data deduplica-
tion ripple effect. Ghory says, “If you are
Key Points
r 5IFOFFEGPS8"/DPOOFDUJWJUZJTPOUIF
SJTF*UJTCFJOHESJWFONPTUMZCZJODSFBTFE
GPDVTPOEJTBTUFSSFDPWFSZBOESFNPUF
PGGJDFFNQPXFSNFOU
r 8"/CBOEXJEUICFDPNFTJODSFBTJOHMZ
NPSFFYQFOTJWFBTUIFTQFFEJODSFBTFT
r 8"/PQUJNJ[BUJPOJTBXBZUPJNQSPWF
SFQMJDBUJPOTQFFETBOESFNPUFPGGJDFJOUFS-
BDUJPOXJUIPVUJODSFBTJOHDPTUT

Evaluation Advice
4FMFDUJOHUIFSJHIU8"/PQUJNJ[BUJPOEFWJDFDPNFTEPXOUPVOEFSTUBOEJOHXIBUZPVXBOUUP
EPi5IFSFBSFTPMVUJPOTUIBUBSFEFTJHOFEGPSCSBODIPGGJDFDPOTPMJEBUJPOBOEUIFOUIFSFBSF
UIPTFUIBUBSFEFTJHOFEGPSEBUBDFOUFSUPEBUBDFOUFSDPNNVOJDBUJPO.BLFTVSFZPVLOPX
XIJDIQSPCMFNZPVBSFUSZJOHUPTPMWF uTBZT3PCFSU.BD*OUZSF WJDFQSFTJEFOUPGCVTJOFTT
EFWFMPQNFOUBOENBSLFUJOHBU/FU&Y XXXOFUFYDPN
%BUBDFOUFSUPEBUBDFOUFS8"/TBSF
UZQJDBMMZVTFECZTUPSBHFBOEBQQMJDBUJPOSFQMJDBUJPOQSPEVDUT*OUIFTFDBTFT UIFTVQQPSUGPSIJHIFS
MFWFMQSPUPDPMTJTOPUBTJNQPSUBOUBOENBZEFDSFBTFUIFFGGJDJFODZPGUIF8"/PQUJNJ[FS
.BD*OUZSFBMTPBEWJTFTUIBUBTWJSUVBM8"/BQQMJBODFTCFDPNFNPSFQPQVMBS 4.&TTIPVME
QBZBUUFOUJPOUPUIFJSWJSUVBMGPPUQSJOUTDPNQBSFIPXNVDINFNP SZ EJTLTQBDF BOE$16
QSPDFTTJOHQPXFSUIFWJSUVBMBQQMJBODFTXJMMSFRVJSF"MTP CFXBSFUIBUTPNFWFOEPSTQVUMJNJUT
POIPXNVDIEBUBPSIPXGBTUBOBQQMJBODFDBOUSBOTGFSEBUBCBTFEVQPOUIFWJSUVBMBQQMJBODF
WFSTJPO$FSUFPO XXXDFSUFPODPN
$50%POBUP#VDDFMMBTVHHFTUTUIBUZPVBMTPGPDVTPO
UIFGVMMMPBEPGXIBUZPVXJMMFWFOUVBMMZCFSFQMJDBUJOH)FBMTPBEWJTFTBEEJOHBOPUIFSEBUBTFU
BOEBSFNPUFTJUFUPTVQQPSUEVSJOHBOFWBMVBUJPOQFSJPE
“By focusing on the iSCSI protocol and
optimizing it, the WAN optimization
solution can eliminate much of the
overhead associated with iSCSI.”
-Certeon’s Donato Buccella
Videoconferencing
Investments
On The Rise,
Report Says
*OTQJUFPGBOEQFSIBQTQBSUMZEVFUPB
XFBLFDPOPNZXPSMEXJEF DPSQPSBUFTQFOE-
JOHPOWJEFPDPOGFSFODJOHBOEUFMFQSFTFODF
TPMVUJPOTXJMMEPVCMFPWFSUIFOFYUGFXZFBST 
BDDPSEJOHUPBSFDFOU*OGPOFUJDTSFQPSU8IJMF
TBMFTGJHVSFTGPSNBOZUFDIOPMPHZTFDUPST
SFNBJOFEGMBU MBTUZFBSTXPSMEXJEFSFWFOVFT
GPSWJEFPDPOGFSFODJOHBOEUFMFQSFTFODFUFDI-
OPMPHJFTIJUCJMMJPO BOETVSWFZTJOEJDBUF
UIBUUIFTUFBEZHSPXUIXJMMDPOUJOVF
#FIJOEUIBUHSPXUIJTBDPNQMFYDPOTUFMMBUJPOPG
ESJWFST NBOZUJFEUPUIFUJHIUFDPOPNZBOEUPUIF
QSFWBMFODFPGEJTQBSBUFXPSLFSTMPDBUFEBSPVOE
UIFDPVOUSZBOEBSPVOEUIFXPSME NBOZPGXIPN
VTFUFDIOPMPHZUPPMTUPFOBCMFWBSJPVTGPSNTPG
SFNPUFDPMMBCPSBUJPO5IJTTUJMMFWPMWJOH IJHIMZ
WJSUVBMJ[FEXPSLGPSDFIFMQTGFFEUIFHSPXJOH
EFNBOEGPSSPCVTUDPMMBCPSBUJWFUFDIOPMPHJFT
i"UBIJHIMFWFM HFPHSBQIJDBMMZEJTQFSTFE
UFBNTBSFESJWJOHWJEFP CPUIBTBNFBOTUP
JNQSPWFEBZUPEBZDPNNVOJDBUJPOBTXFMMBT
BXBZUPSFQMBDFTPNFUSBWFM uTBZT.BUUIJBT
.BDIPXJOTLJ *OGPOFUJDTEJSFDUJOHBOBMZTUGPS
FOUFSQSJTFOFUXPSLTBOEWJEFPi5IFTUSPOH
HSPXUIJOBMTPDPNFTPGGBXFBL
EVFUPUIFSFDFTTJPOu
A Growing Trend
7JEFPDPOGFSFODJOHIBTIJTUPSJDBMMZCFFOBWBJM-
BCMFJOUIFGPSNPGTJNQMF GSFFTUBOEJOHEFTLUPQ
BQQMJDBUJPOTVTFECZJOEJWJEVBMTBUUIFJSEFTLT
BOEBMTPJOUIFGPSNPGNPSFDPNQMFYDPOGFSFODF
SPPNTFUVQTUIBUBMMPXGPSNVMUJQMFTJNVMUBOFPVT
QBSUJDJQBOUT(SPXUIXJMMPDDVSJOTBMFTPGCPUI
UZQFTPGQSPEVDUT .BDIPXJOTLJTBZT CVUUIF
HSPXUIJOEFTLUPQBQQTXPOUIBWFBCJHSFWFOVF
JNQBDUCFDBVTFWFOEPSTPGGFSUIPTFBUBWFSZ
MPXQSJDF.VDIQSJDJFSDPOGFSFODFSPPNTFUVQT
PGGFSDPNQBOJFTFYQBOEFEGVODUJPOBMJUZXIJMF
QSPWJEJOHNVDIHSFBUFSNBSHJOTGPSWFOEPST
i$PNNVOJDBUJOHWJBWJEFPDPOUJOVFTUPCFPOF
PGUIFUPQUSFOETJOUFMFDPN BTFWJEFODFECZ
TUSPOHHSPXUIJOUIFFOUFSQSJTFWJEFPNBSLFU u
.BDIPXJOTLJDPOUJOVFTi#VTJOFTTFTXPSMEXJEF
BSFMPPLJOHGPSSJDIFSNFBOTPGDPNNVOJDBUJPOT
XJUIUIFJSFNQMPZFFT QBSUOFST BOEDVTUPNFST 
BOEFOUFSQSJTFWJEFPDPOGFSFODJOHBOEUFMFQSFT-
FODFTPMVUJPOTBSFBOBUVSBMGJUu
'PS*5BOEEBUBDFOUFSTUBGG UIFHSPXUIJOWJE-
FPDPOGFSFODJOHXJMMOPEPVCUIFMQJODSFBTFUIF
MPBEPO*5JOGSBTUSVDUVSFTi7JEFPXJMMIBWFBCJH
JNQBDUPOCBOEXJEUIDPOTVNQUJPO BOE*5NBO-
BHFSTOFFEUPNPEFMUIFJNQBDUUPTFFXIFSF
VQHSBEFTOFFEUPCFNBEF CPUIJOUFSNTPG
OFXFRVJQNFOUBTXFMMBTTFSWJDFT UPBWPJE
VOQMFBTBOUTVSQSJTFT u.BDIPXJOTLJOPUFT
$PNQBOJFTBSPVOEUIFXPSMEBSFTFFLJOH
XBZTUPSFEVDFUSBWFMDPTUTXIJMFGBDJMJUBU-
JOHUJNFMZBOEFGGJDJFOUDPNNVOJDBUJPO BOE
WJEFPDPOGFSFODJOHOPXUIBUUIFUFDIOPMPHZ
CFIJOEJUIBTNBUVSFEIBTQSPWFOBQPQVMBS
BOEDPTUFGGFDUJWFTPMVUJPO
by Rod Scher
News
Page 30 Processor.com May 6, 2011