This PPT is about Cloud Computing.

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Cloud Computing,Cloud Computing,
Amazon EC2Amazon EC2 && S3S3

2. Cloud ComputingCloud Computing
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Cloud computing is the use of computing resources (hardware and
software) that are delivered as services over a network (typically the
Internet).
These services are broadly divided into three categories:
1) Infrastructure-as-a-Service (IaaS)
2) Platform-as-a-Service (PaaS)
3) Software-as-a-Service (SaaS)
The goal of cloud computing is to provide easy, scalable access to
computing resources and IT services.

3. Defining the CloudDefining the Cloud
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In the context of cloud hosting there is no physical object which you can point
to and label as the cloud. It’s more of an electronic structure where data is
stored over many different computers and served up via a network
connection, typically the Internet.
When you get into cloud hosting these server farms behave as one large
storage space and processor. The actual website data (such as HTML/CSS
files, images, etc.) is spread out over a cluster of hard drives connected
together, much like one virtual disk with tremendous capacity. Server clusters
can provide a cloud setup with literally unlimited machines to run through.

4. Benefits of Cloud HostingBenefits of Cloud Hosting
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1) Elasticity: This is the most important attribute of the Cloud. A user might
start running host application on just a single server. But in no time, Cloud
Computing enables user to scale the application to run on 100’s of servers.
Once the traffic and usage of the application decreases, user can scale down
to 10’s of servers. All this happens almost instantly and the best thing is the
application and its users don’t even realize that.
2) Pay-By-Use: Elasticity and Pay-By-Use attributes go hand in hand. When
users are scaling up or down their application by adding more resources, they
know how much it is going to cost.
3) Self Service: When users are able to enjoy the capability of scaling up
and scaling down and only pay for what they use, they never want to wait for
someone in the datacenter to add an additional server for their application.
Through the use of a web portal, cloud customers are able to automatically
provision specific servers and network storage without human interaction,
submit payment and invoice for services, and manage infrastructure and
equipment inventories.

5. Types of CloudsTypes of Clouds
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A cloud can be private, public, community or hybrid.
A public cloud sells services to anyone on the Internet. (Currently, Amazon
Web Services is the largest public cloud provider.)
Public Cloud is implemented on thousands of
servers running across hundreds of data centers
deployed across tens of locations around the
world. The best thing about Public Cloud is that
the customers can choose a location for his
application to be deployed. This reduces the
latency when the consumers access the
application.
For example, a London based business can choose to deploy their app at the
Europe data center and an American company prefers a data center in North
America.

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A private cloud is a proprietary network or a data center that supplies hosted
services to a limited number of people.
Private Clouds are normal data centers within an
enterprise with all the 4 attributes of the Cloud –
Elasticity, Self Service, Pay-By-Use and
Programmability.
By setting up a Private Cloud, enterprises can
consolidate their IT infrastructure.
Private Cloud borrows some of the best practices
of Public Cloud but limited to an organizational
boundary.
Private Cloud can be setup using a variety of offerings from vmWare,
Microsoft, IBM, SUN and others. There are also some of the Open Source
implementations like Eucalyptus and Ubuntu Enterprise Cloud.

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Community Cloud is implemented when a set of businesses have a similar
requirement and share the same context. This would be made available to a
set of select organizations.
So, a Community Cloud is a sort of Private Cloud but goes beyond just one
organization.

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Hybrid Cloud: The hybrid cloud infrastructure is a composition of two or
more clouds (private, community, or public) that remain unique entities but
are bound together by standardized or proprietary technology that enables
data and application portability.
Using a Hybrid approach companies can maintain control of an internally
managed private cloud while relying on the public cloud as needed.

9. Cloud Hosting vs. Traditional HostingCloud Hosting vs. Traditional Hosting
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In Cloud hosting, the user have the ability to control how many
resources are in use at any given point in time.
Traditional hosting services generally provide a fixed number of
resources for a fixed amount of time, meaning that users have a
limited ability to easily respond when their usage is rapidly
changing, unpredictable, or is known to experience large peaks
at various intervals.
Secondly, many hosting services don’t provide full control over
the compute resources being provided.
Using cloud hosting, developers can choose not only to initiate
or shut down instances at any time, they can completely
customize the configuration of their instances to suit their needs
– and change it at any time.

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Finally, with cloud hosting, developers enjoy the benefit of
paying only for their actual resource consumption – and at very
low rates. Most hosting services require users to pay a fixed,
up-front fee irrespective of their actual computing power used,
and so users risk overbuying resources to compensate for the
inability to quickly scale up resources within a short time frame.

11. Popular ProvidersPopular Providers
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-Amazon Web Services
-Rackspace
-CenturyLink/Savvis
-Salesforce.com
-Verizon/Terremark
-Joyent
-Citrix
-Bluelock
-Microsoft
-VMware

12. Amazon EC2Amazon EC2
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Amazon Elastic Compute Cloud (Amazon EC2) is a web service that provides
resizable compute capacity in the cloud.
EC2 allows users to rent virtual computers on which to run their own
computer applications.
To use the EC2, a subscriber creates an Amazon Machine Image (AMI)
containing the operating system, application programs and configuration
settings. Then the AMI is uploaded to the Amazon Simple Storage Service
(Amazon S3) and registered with Amazon EC2, creating a so-called AMI
identifier (AMI ID).
Once this has been done, the subscriber can request virtual machines on an
as-needed basis. Capacity can be increased or decreased in real time from
as few as one to more than 1000 virtual machines simultaneously. Billing
takes place according to the computing and network resources consumed.

13. AmazonAmazon SimpleSimple StorageStorage Service (AmazonService (Amazon S3)S3)
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Amazon S3 provides a simple web services interface that can be used to
store and retrieve any amount of data, at any time, from anywhere on the
web.
It gives any developer access to the same highly scalable, reliable, secure,
fast, inexpensive infrastructure that Amazon uses to run its own global
network of web sites. The service aims to maximize benefits of scale and to
pass those benefits on to developers.
Just like a bucket holds water, Amazon S3 buckets are like a container for
your files.
S3 stores arbitrary objects (computer files) up to 5 terabytes in size, each
accompanied by up to 2 kilobytes of metadata. Objects are organized into
buckets (each owned by an Amazon Web Services or AWS account), and
identified within each bucket by a unique, user-assigned key.

14. Spreading images in S3Spreading images in S3
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The AWS account provides an option to create buckets.
FTP
images
Site developed in Joomla.
All the images are stored
in an directory on FTP server.
S3
JA Amazon S3 is a component provided to interact with the AWS
account. It can be associated with AWS account (using account id,
accessKeyId, SecretKey) and the buckets created in the account can
be fetched. These buckets can then be associated with the required
directory to be uploaded to S3 and data transferred to cloud.
Bucket
Bucket
Bucket
Bucket
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consectetur adipisicing elit,
sed do eiusmod tempor incididunt
ut labore et dolore magna aliqua.
When the user views the site, the images
are then fetched from the nearest S3 storage
instead of ftp server directory thus making it
faster to load the webpage.

15. Using Amazon S3 classesUsing Amazon S3 classes
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Once the ftp directories are sync with S3 though JA Amazon S3 component,
a copy of image is placed on S3.
When admin or user uploads new images to website, the bucket sync is
processed again and the newly uploaded images are copied to S3.
So first the images are copied to ftp and then to S3. However, once the
images are copied to S3, the same are not deleted from the ftp server thus
consuming space on ftp as well as S3.
At OSTOST, we extended the use of Amazon S3 classes to upload image
directly to S3 and in the process by-passing the ftp folder. This way the
images are only on S3 and thus reducing the load on ftp.

16. Thank YouThank You
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