BUS466 Web-Enabled Business

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4 Δεκ 2013 (πριν από 3 χρόνια και 8 μήνες)

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BUS466

Web
-
Enabled Business

Twelfth Lecture:
November 20, 2013

Sources: please contact for list of sources

o
What’s New In Technology

o
Smart Technologies

o
Presentation

Agenda

What’s New Technology

What’s New Technology

What’s New Technology

What’s New Technology

What’s New Technology

What’s New Technology

What’s New Technology

What’s New Technology

What’s New Technology

Cloud Computing

What is Cloud Computing?

o
Cloud Computing
is a general term used to describe a new
class of network based computing that takes place over the
Internet,

o
basically a step on from Utility Computing

o
a collection/group of integrated and networked hardware,
software and Internet infrastructure (called a platform).

o
Using the Internet for communication and transport
provides hardware, software and networking services to
clients

o
These platforms hide the complexity and details of the
underlying infrastructure from users and applications by
providing very simple graphical interface or API (Applications
Programming Interface).

13

What is Cloud Computing?

o
In addition, the platform provides on demand
services, that are always on, anywhere, anytime and
any place.

o
Pay for use and as needed, elastic

o
scale up and down in capacity and functionalities

o
The hardware and software services are available to

o
general public, enterprises, corporations and businesses
markets

14

Cloud Summary

o
Cloud computing is an umbrella term used to refer to
Internet based development and services


o
A number of characteristics define cloud data,
applications services and infrastructure:

o
Remotely hosted
: Services or data are hosted on remote
infrastructure.

o
Ubiquitous
: Services or data are available from anywhere.

o
Commodified
: The result is a utility computing model
similar to traditional that of traditional utilities, like gas and
electricity
-

you pay for what you would want!


15

Cloud Architecture

16

o
Must Haves

o
Massive Scale

o
Virtualization

o
Low Cost

o
Geographic Distribution

o
Service Oriented

o
Must Haves

o
On Demand Service

o
Broad Network Access

o
Resource Pooling

o
Scalability

o
Security



Characteristics

Cloud Service Models

18

SalesForce CRM

Adopted from: Effectively and Securely Using the Cloud Computing Paradigm by peter Mell, Tim
Grance

Google App


Engine

o

-

A
SaaS

provider gives subscribers access to
both resources and
applications
.
SaaS

makes it
unnecessary for you to have a physical copy of
software to install
on
your devices.
SaaS

also
makes it easier to have the same software on all
of your devices at
3 once
by accessing it on the
cloud. In a
SaaS

agreement, you have the least
control over the
cloud.”



Software as a Service

o
“Platform
as a Service
-

A
PaaS

system goes a
level above the Software as a Service setup. A
PaaS

provider gives subscribers access to the
components that they require to develop and
operate
applications over the internet
.”




Platform as a Service


o
“Infrastructure
as a Service
-

An
IaaS

agreement,
as the name states, deals primarily with
computational
infrastructure. In an
IaaS

agreement, the subscriber completely
outsources the
storage
and resources, such as
hardware and software, that they need
.”

Software as a Service

What is the purpose and benefits?

o
Cloud computing enables companies and
applications, which are system infrastructure
dependent, to be infrastructure
-
less.

o
By using the Cloud infrastructure on “pay as used and
on demand”, all of us can save in capital and
operational investment!

o
Clients can:

o
Put their data on the platform instead of on their own
desktop PCs and/or on their own servers.

o
They can put their applications on the cloud and use the
servers within the cloud to do processing and data
manipulations etc.

22

Software as a Service (
SaaS
)

o
SaaS is a model of software deployment where an
application is hosted as a service provided to
customers across the Internet.

o
Saas alleviates the burden of software
maintenance/support

o
but users relinquish control over software versions and
requirements.

o
Terms that are used in this sphere include

o
Platform as a Servic
e (PaaS) and

o
Infrastructure as a Service
(IaaS)


23

Cloud
-
Sourcing

o
Why is it becoming a Big Deal:

o
Using high
-
scale/low
-
cost providers,

o
Any time/place access via web browser,

o
Rapid scalability; incremental cost and load sharing,

o
Can forget need to focus on local IT.

o
Concerns:

o
Performance, reliability, and SLAs,

o
Control of data, and service parameters,

o
Application features and choices,

o
Interaction between Cloud providers,

o
No standard API


mix of SOAP and REST!

o
Privacy, security, compliance, trust…

24

Some Commercial Cloud Offerings

25

Cloud Taxonomy

26

Cloud Storage

o
Several large Web companies are now exploiting the
fact that they have data storage capacity that can be
hired out to others.

o
allows data stored remotely to be temporarily cached on
desktop computers, mobile phones or other Internet
-
linked
devices.


o
Amazon

s Elastic Compute Cloud (EC2) and Simple
Storage Solution (S3) are well known examples

o
Mechanical Turk

27

Amazon Simple Storage Service (S3)

o
Unlimited Storage.

o
Pay for what you use:

o
$0.20 per GByte of data transferred,

o
$0.15 per GByte
-
Month for storage used,

o
Second Life Update:

o
1TBytes, 40,000 downloads in 24 hours
-

$200,

28

Advantages of Cloud Computing

o
Lower computer costs:

o
You do not need a high
-
powered and high
-
priced computer to
run cloud computing's web
-
based applications.

o
Since applications run in the cloud, not on the desktop PC,
your desktop PC does not need the processing power or hard
disk space demanded by traditional desktop software.

o
When you are using web
-
based applications, your PC can be
less expensive, with a smaller hard disk, less memory, more
efficient processor...

o
In fact, your PC in this scenario does not even need a CD or
DVD drive, as no software programs have to be loaded and no
document files need to be saved.

29

Advantages of Cloud Computing

o
Improved performance:

o
With few large programs hogging your computer's memory,
you will see better performance from your PC.

o
Computers in a cloud computing system boot and run faster
because they have fewer programs and processes loaded
into memory…

o
Reduced software costs:

o
Instead of purchasing expensive software applications, you
can get most of what you need for free
-
ish!

o
most cloud computing applications today, such as the Google Docs suite.

o
better than paying for similar commercial software

o
which alone may be justification for switching to cloud applications.

30

Advantages of Cloud Computing

o
Instant software updates:

o
Another advantage to cloud computing is that you are no longer faced
with choosing between obsolete software and high upgrade costs.

o
When the application is web
-
based, updates happen automatically

o
available the next time you log into the cloud.

o
When you access a web
-
based application, you get the latest version

o
without needing to pay for or download an upgrade.


o
Improved document format compatibility.

o
You do not have to worry about the documents you create on your
machine being compatible with other users' applications or OSes

o
There are potentially no format incompatibilities when everyone is
sharing documents and applications in the cloud.

31

Advantages of Cloud Computing

o
Unlimited storage capacity:

o
Cloud computing offers virtually limitless storage.

o
Your computer's current 1 Tbyte hard drive is small
compared to the hundreds of Pbytes available in the cloud.

o
Increased data reliability:

o
Unlike desktop computing, in which if a hard disk crashes
and destroy all your valuable data, a computer crashing in
the cloud should not affect the storage of your data.

o
if your personal computer crashes, all your data is still out there in
the cloud, still accessible

o
In a world where few individual desktop PC users back up
their data on a regular basis, cloud computing is a data
-
safe
computing platform!

32

Advantages of Cloud Computing

o
Universal document access:

o
That is not a problem with cloud computing, because you do
not take your documents with you.

o
Instead, they stay in the cloud, and you can access them
whenever you have a computer and an Internet connection

o
Documents are instantly available from wherever you are

o
Latest version availability:

o
When you edit a document at home, that edited version is
what you see when you access the document at work.

o
The cloud always hosts the latest version of your documents

o
as long as you are connected, you are not in danger of having an outdated
version

33

Advantages of Cloud Computing

o
Easier group collaboration:

o
Sharing documents leads directly to better collaboration.

o
Many users do this as it is an important advantages of cloud
computing

o
multiple users can collaborate easily on documents and projects

o
Device independence.

o
You are no longer tethered to a single computer or network.

o
Changes to computers, applications and documents follow
you through the cloud.

o
Move to a portable device, and your applications and
documents are still available.

34

Disadvantages of Cloud Computing

o
Requires a constant Internet connection:

o
Cloud computing is impossible if you cannot connect to the
Internet.

o
Since you use the Internet to connect to both your
applications and documents, if you do not have an Internet
connection you cannot access anything, even your own
documents.

o
A dead Internet connection means no work and in areas
where Internet connections are few or inherently
unreliable, this could be a deal
-
breaker.

35

Disadvantages of Cloud Computing

o
Does not work well with low
-
speed connections:

o
Similarly, a low
-
speed Internet connection, such as that
found with dial
-
up services, makes cloud computing painful
at best and often impossible.

o
Web
-
based applications require a lot of bandwidth to
download, as do large documents.

o
Features might be limited:

o
This situation is bound to change, but today many web
-
based applications simply are not as full
-
featured as their
desktop
-
based applications.

o
For example, you can do a lot more with Microsoft PowerPoint than
with Google Presentation's web
-
based offering


36

Disadvantages of Cloud Computing

o
Can be slow:

o
Even with a fast connection, web
-
based applications can
sometimes be slower than accessing a similar software
program on your desktop PC.

o
Everything about the program, from the interface to the
current document, has to be sent back and forth from your
computer to the computers in the cloud.

o
If the cloud servers happen to be backed up at that
moment, or if the Internet is having a slow day, you would
not get the instantaneous access you might expect from
desktop applications.

37

Disadvantages of Cloud Computing

o

Stored data might not be secure:

o
With cloud computing, all your data is stored on the cloud.

o
The questions is How secure is the cloud?

o
Can unauthorised users gain access to your confidential data?

o
Stored data can be lost:

o
Theoretically, data stored in the cloud is safe, replicated across
multiple machines.

o
But on the off chance that your data goes missing, you have
no physical or local backup.

o
Put simply, relying on the cloud puts you at risk if the cloud lets you
down.

38

The Future

o
Many of the activities loosely grouped together under cloud
computing have already been happening and centralised
computing activity is not a new phenomena

o
Grid Computing was the last research
-
led centralised approach

o
However there are concerns that the mainstream adoption of
cloud computing could cause many problems for users

o
Many new open source systems appearing that you can install
and run on your local cluster

o
should be able to run a variety of applications on these systems


39