Introduction to cloud computing

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3 Νοε 2013 (πριν από 3 χρόνια και 5 μήνες)

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Introduction to cloud
computing

Jiaheng Lu

Department of Computer Science

Renmin University of China

www.jiahenglu.net


Course purpose

2




Teach in English



Introduce students

some basic knowledge about
cloud computing








Course contents

3



Basic knowledge




Google , Yahoo! , Amazon cloud technology




Google App Engine Practice



Lecturer Academic experience


2006.9 ~2008.6 University of California,
Irvine, Postdoc researcher



2002.8 ~2006.8 National University of
Singapore, PhD candidate



1998.9 ~ 2001.1

Shanghai Jiao Tong
University Master candidate





University


of California, Irvine

Research in Postdoc

6

6

Data integration in medical system

[US patent]

Approximate string search

[ICDE08]

7

National University of Singapore

Course grading

8



Report 30%




Google App Engine 40%




In
-
class presence and quiz 30%

2013/11/3

9

Any question and any comments ?

Cloud computing

Why we use cloud computing?

Why we use cloud computing?

Case 1:

Write a file

Save

Computer down, file is lost


Files are always stored in cloud, never lost

Why we use cloud computing?

Case 2:

Use IE
---

download, install, use

Use QQ
---

download, install, use

Use C++
---

download, install, use

……


Get the serve from the cloud

What is cloud and cloud
computing?

Cloud

Demand resources or services over Internet

scale and reliability of a data center.


What is cloud and cloud
computing?


Cloud computing

is a style of computing
in which
dynamically scalable

and often
virtualized

resources are provided as a
serve over the Internet.



Users need not have knowledge of,
expertise in, or control over the technology
infrastructure in the "cloud" that supports
them.



The architecture of cloud computing
system

Characteristics of cloud
computing


Virtual.


software, databases, Web servers,
operating systems, storage and networking
as virtual servers.



On demand.


add and subtract processors, memory,
network bandwidth, storage.



IaaS

Infrastructure as a Service

PaaS

Platform as a Service

SaaS

Software as a Service

Types of cloud service

Software delivery model



No hardware or software to manage


Service delivered through a browser


Customers use the service on demand


Instant Scalability




SaaS

Examples



Your current CRM package is not
managing the load or you simply don’t
want to host it in
-
house. Use a SaaS
provider such as Salesforce.com




Your email is hosted on an exchange
server in your office and it is very slow.
Outsource this using Hosted Exchange.


SaaS

Platform delivery
model



Platforms are built upon
Infrastructure, which is expensive


Estimating demand is not a science!


Platform management is not fun!

PaaS

Examples



You need to h
ost a large file (5Mb) on your
website and make it available for 35,000 users for
only two months duration. Use Cloud Front from
Amazon
.



You want to start storage services on your network
for a large number of files and you do not have the
storage capacity…use Amazon S3.


PaaS

Computer infrastructure
delivery model



A platform virtualization
environment


Computing resources, such as
storing and processing capacity.



Virtualization taken a step further

IaaS

Examples



You want to run a batch job but you don’t
have the infrastructure necessary to run it
in a timely manner. Use Amazon EC2.




You want to host a website, but only for a
few days. Use Flexiscale.

IaaS

Cloud computing and other computing
techniques



An Industry Transformed

http://www.boxofficemojo.com/

Delgo www.delgo.com

Shrek, Delgo, and Others


Why did Dreamworks use this?


Upsides?


Downsides?

Grid Computing & Cloud Computing


share a lot commonality


intention, architecture and technology




Difference


programming model, business model,
compute model, applications, and
Virtualization
.

Grid Computing & Cloud Computing


the problems are mostly the same


manage large facilities;



define methods by which consumers
discover, request and use resources
provided by the central facilities;



implement the often highly parallel
computations that execute on those
resources.

Grid Computing & Cloud Computing


Virtualization


Grid


do not rely on virtualization as much
as Clouds do, each individual
organization maintain full control of
their resources


Cloud


an indispensable ingredient for
almost every Cloud

2013/11/3

35

Any question and any comments ?

Google App Engine

37



Google App Engine



Does one thing well: running web apps



Simple app configuration



Scalable



Secure

38



App Engine Does One Thing
Well


App Engine handles HTTP(S)
requests, nothing else


Think RPC: request in, processing,
response out


Works well for the web and AJAX; also
for other services



App configuration is dead simple


No performance tuning needed


App Engine Architecture

39



Python

VM

process

stdlib

app

memcache

datastore

mail

images

urlfech

stateful

APIs

stateless APIs

R/O FS

req/resp

How to use Google App engine


Download Java 6



Download Eclipse and Google plug in



Register a user account in Google



Create an application (python, Java) and
upload the code

In class quiz


Please answer all questions




You may be requested to answer a question
later. Your performance will affect your final
score.

Next course


明德网络

1015



7

3
日周五




8

00

11

30


Study Google App Engine

http://code.google.com/intl/en/appengine/docs/j
ava/gettingstarted/