Cloud Computing Unit-2
Cloud Architecture
Cloud Service Models
There are the following three types of cloud service models -
1. Infrastructure as a Service (IaaS)
2. Platform as a Service (PaaS)
3. Software as a Service (SaaS)
Infrastructure as a Service (IaaS):
IaaS is also known as Hardware as a Service (HaaS). It is a computing infrastructure
managed over the internet. The main advantage of using IaaS is that it helps users to avoid
the cost and complexity of purchasing and managing the physical servers.
Characteristics of IaaS
There are the following characteristics of IaaS -
Resources are available as a service
Services are highly scalable
Dynamic and flexible
GUI and API-based access
Automated administrative tasks
Example: DigitalOcean, Linode, Amazon Web Services (AWS), Microsoft Azure, Google
Compute Engine (GCE), Rackspace, and Cisco Metacloud.
By: Preetham Paul Socrates P Assistant Professor SDC
,Cloud Computing Unit-2
Platform as a Service (PaaS):
PaaS cloud computing platform is created for the programmer to develop, test, run, and
manage the applications.
Characteristics of PaaS
There are the following characteristics of PaaS -
Accessible to various users via the same development application.
Integrates with web services and databases.
Builds on virtualization technology, so resources can easily be scaled up or down as
per the organization's need.
Support multiple languages and frameworks.
Provides an ability to "Auto-scale".
Example: AWS Elastic Beanstalk, Windows Azure, Heroku, Force.com, Google App Engine,
Apache Stratos, Magento Commerce Cloud, and OpenShift.
Software as a Service (SaaS):
SaaS is also known as "on-demand software". It is a software in which the applications are
hosted by a cloud service provider. Users can access these applications with the help of
internet connection and web browser.
Characteristics of SaaS
There are the following characteristics of SaaS -
Managed from a central location
Hosted on a remote server
Accessible over the internet
Users are not responsible for hardware and software updates. Updates are applied
automatically.
The services are purchased on the pay-as-per-use basis
Example: BigCommerce, Google Apps, Salesforce, Dropbox, ZenDesk, Cisco WebEx,
ZenDesk, Slack, and GoToMeeting.
By: Preetham Paul Socrates P Assistant Professor SDC
, Cloud Computing Unit-2
Difference between IaaS, PaaS, and SaaS:
# IaaS Paas SaaS
1 It provides a virtual data It provides virtual platforms It provides web software and
center to store information and tools to create, test, and apps to complete business
and create platforms for app deploy apps. tasks.
development, testing, and
deployment.
2 It provides access to resources It provides runtime It provides software as a
such as virtual machines, environments and deployment service to the end-users.
virtual storage, etc. tools for applications.
3 It is used by network It is used by developers. It is used by end users.
architects.
4 IaaS provides only PaaS provides SaaS provides
Infrastructure. Infrastructure+Platform. Infrastructure+Platform
+Software.
Cloud Deployment Models
Today, organizations have many exciting opportunities to reimagine, repurpose and reinvent
their businesses with the cloud. The last decade has seen even more businesses rely on it for
quicker time to market, better efficiency, and scalability. It helps them achieve lo ng-term
digital goals as part of their digital strategy.
Though the answer to which cloud model is an ideal fit for a business depends on your
organization's computing and business needs. Choosing the right one from the various types
of cloud service deployment models is essential. It would ensure your business is equipped
with the performance, scalability, privacy, security, compliance & cost-effectiveness it
requires. It is important to learn and explore what different deployment types can offer -
around what particular problems it can solve.
Read on as we cover the various cloud computing deployment and service models to help
discover the best choice for your business.
What Is A Cloud Deployment Model?
It works as your virtual computing environment with a choice of deployment model
depending on how much data you want to store and who has access to the Infrastructure.
By: Preetham Paul Socrates P Assistant Professor SDC
Cloud Architecture
Cloud Service Models
There are the following three types of cloud service models -
1. Infrastructure as a Service (IaaS)
2. Platform as a Service (PaaS)
3. Software as a Service (SaaS)
Infrastructure as a Service (IaaS):
IaaS is also known as Hardware as a Service (HaaS). It is a computing infrastructure
managed over the internet. The main advantage of using IaaS is that it helps users to avoid
the cost and complexity of purchasing and managing the physical servers.
Characteristics of IaaS
There are the following characteristics of IaaS -
Resources are available as a service
Services are highly scalable
Dynamic and flexible
GUI and API-based access
Automated administrative tasks
Example: DigitalOcean, Linode, Amazon Web Services (AWS), Microsoft Azure, Google
Compute Engine (GCE), Rackspace, and Cisco Metacloud.
By: Preetham Paul Socrates P Assistant Professor SDC
,Cloud Computing Unit-2
Platform as a Service (PaaS):
PaaS cloud computing platform is created for the programmer to develop, test, run, and
manage the applications.
Characteristics of PaaS
There are the following characteristics of PaaS -
Accessible to various users via the same development application.
Integrates with web services and databases.
Builds on virtualization technology, so resources can easily be scaled up or down as
per the organization's need.
Support multiple languages and frameworks.
Provides an ability to "Auto-scale".
Example: AWS Elastic Beanstalk, Windows Azure, Heroku, Force.com, Google App Engine,
Apache Stratos, Magento Commerce Cloud, and OpenShift.
Software as a Service (SaaS):
SaaS is also known as "on-demand software". It is a software in which the applications are
hosted by a cloud service provider. Users can access these applications with the help of
internet connection and web browser.
Characteristics of SaaS
There are the following characteristics of SaaS -
Managed from a central location
Hosted on a remote server
Accessible over the internet
Users are not responsible for hardware and software updates. Updates are applied
automatically.
The services are purchased on the pay-as-per-use basis
Example: BigCommerce, Google Apps, Salesforce, Dropbox, ZenDesk, Cisco WebEx,
ZenDesk, Slack, and GoToMeeting.
By: Preetham Paul Socrates P Assistant Professor SDC
, Cloud Computing Unit-2
Difference between IaaS, PaaS, and SaaS:
# IaaS Paas SaaS
1 It provides a virtual data It provides virtual platforms It provides web software and
center to store information and tools to create, test, and apps to complete business
and create platforms for app deploy apps. tasks.
development, testing, and
deployment.
2 It provides access to resources It provides runtime It provides software as a
such as virtual machines, environments and deployment service to the end-users.
virtual storage, etc. tools for applications.
3 It is used by network It is used by developers. It is used by end users.
architects.
4 IaaS provides only PaaS provides SaaS provides
Infrastructure. Infrastructure+Platform. Infrastructure+Platform
+Software.
Cloud Deployment Models
Today, organizations have many exciting opportunities to reimagine, repurpose and reinvent
their businesses with the cloud. The last decade has seen even more businesses rely on it for
quicker time to market, better efficiency, and scalability. It helps them achieve lo ng-term
digital goals as part of their digital strategy.
Though the answer to which cloud model is an ideal fit for a business depends on your
organization's computing and business needs. Choosing the right one from the various types
of cloud service deployment models is essential. It would ensure your business is equipped
with the performance, scalability, privacy, security, compliance & cost-effectiveness it
requires. It is important to learn and explore what different deployment types can offer -
around what particular problems it can solve.
Read on as we cover the various cloud computing deployment and service models to help
discover the best choice for your business.
What Is A Cloud Deployment Model?
It works as your virtual computing environment with a choice of deployment model
depending on how much data you want to store and who has access to the Infrastructure.
By: Preetham Paul Socrates P Assistant Professor SDC
