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Cloud computing
What is cloud computing?
? In the simplest terms, cloud computing means storing
and accessing data and programs over the Internet
instead of your computer¡¯s hard drive.
Components of cloud
? The Client-end users
These are the devices which interact with the users. For
ex:-mobiles.
? Datacenter
It is the collection of severs where application is placed
and accessed.
? Distributed servers
Often servers are at geographically different places, but
they are working next to each other.
Characteristics
Service Models
? Infrastructure as a service (IaaS)
? Platform as a service (PaaS)
? Software as a service (SaaS)
Infrastructure as a service
? This means you're buying access to raw computing
hardware over the Net, such as servers or storage.
? Example of IaaS:-
Ordinary web hosting is a simple example of IaaS:
Platform as a service
? This means you develop applications using Web-based
tools so they run on systems software and hardware
provided by another company.
? Examples of PaaS:-
Google App Engine, Force.com (from salesforce.com)
Software as a service
? This means you use a complete application running on
someone else's system.
? Examples of SaaS:-
Web-based email and Google Documents are perhaps the
best-known examples.
Types of cloud
? Public cloud
Available to general public or large industry group and is
owned by an organisation selling cloud services.
Ex:- Amazon
? Private cloud
Operated solely for an organisation or a company.
? Hybrid cloud
Combination of public and private but bounded by
standardised technologies.
Advantages
? Convenience. We can access our data anywhere we can
connect to the Internet.
? Security. Most companies use industrial level security
software and practices which make it harder for hackers
to get at your data.
? Backups. We have a backup of our data in case your
local computer crashes.
? Collaboration. With our permission, others can access,
view, and modify your documents.
? Environmentally friendly. It takes fewer resources to
cloud compute, thus saving energy.
Disadvantages
? Security breaches. If there is a compromise of the
server(s) where our data is stored, our personal
information may be exposed to the world.
? Outages. Sometimes we are unable to access to
many application due to our provider being down.
This leads to most inconvenient situations.
? Storage limits. We have to pay, when we have to
store more data beyond the limit of local hard.
There also may be a limit on the size of the data that
can be stored.
Continue...
? Slow speeds. Uploading and downloading of large
documents may take a long time.
? Limited features. If we use remote software that¡¯s
provided by the storage service to manipulate and
modify our data, it usually lacks the features of a
program running locally.
Some examples of cloud computing
? Facebooks¡¯ cloud computers and software are good for
connecting with friends and family, and giving yourself
an online identity.
? Apple¡¯s iCloud computers are good at storing and
syncing your stuff like music, pictures, calendars etc
across your Apple devices (iPod, iPhone, iMac etc).
? Amazon¡¯s Kindle cloud computers are good at storing
and syncing the eBooks you buy from Amazon.
Continue....
? Some of the biggest cloud computing services are Web-
based e-mail. It also means that your e-mail is accessible
from anywhere.
? Recently nation¡¯s health IT infrastructure selected a
cloud computing platform to manage the selection and
implementation of Electronic Health Record (EHR)
systems across the country.
Some cloud companies...
Cloud computing

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Cloud computing

  • 2. What is cloud computing? ? In the simplest terms, cloud computing means storing and accessing data and programs over the Internet instead of your computer¡¯s hard drive.
  • 3. Components of cloud ? The Client-end users These are the devices which interact with the users. For ex:-mobiles. ? Datacenter It is the collection of severs where application is placed and accessed. ? Distributed servers Often servers are at geographically different places, but they are working next to each other.
  • 5. Service Models ? Infrastructure as a service (IaaS) ? Platform as a service (PaaS) ? Software as a service (SaaS)
  • 6. Infrastructure as a service ? This means you're buying access to raw computing hardware over the Net, such as servers or storage. ? Example of IaaS:- Ordinary web hosting is a simple example of IaaS:
  • 7. Platform as a service ? This means you develop applications using Web-based tools so they run on systems software and hardware provided by another company. ? Examples of PaaS:- Google App Engine, Force.com (from salesforce.com)
  • 8. Software as a service ? This means you use a complete application running on someone else's system. ? Examples of SaaS:- Web-based email and Google Documents are perhaps the best-known examples.
  • 9. Types of cloud ? Public cloud Available to general public or large industry group and is owned by an organisation selling cloud services. Ex:- Amazon ? Private cloud Operated solely for an organisation or a company. ? Hybrid cloud Combination of public and private but bounded by standardised technologies.
  • 10. Advantages ? Convenience. We can access our data anywhere we can connect to the Internet. ? Security. Most companies use industrial level security software and practices which make it harder for hackers to get at your data. ? Backups. We have a backup of our data in case your local computer crashes. ? Collaboration. With our permission, others can access, view, and modify your documents. ? Environmentally friendly. It takes fewer resources to cloud compute, thus saving energy.
  • 11. Disadvantages ? Security breaches. If there is a compromise of the server(s) where our data is stored, our personal information may be exposed to the world. ? Outages. Sometimes we are unable to access to many application due to our provider being down. This leads to most inconvenient situations. ? Storage limits. We have to pay, when we have to store more data beyond the limit of local hard. There also may be a limit on the size of the data that can be stored.
  • 12. Continue... ? Slow speeds. Uploading and downloading of large documents may take a long time. ? Limited features. If we use remote software that¡¯s provided by the storage service to manipulate and modify our data, it usually lacks the features of a program running locally.
  • 13. Some examples of cloud computing ? Facebooks¡¯ cloud computers and software are good for connecting with friends and family, and giving yourself an online identity. ? Apple¡¯s iCloud computers are good at storing and syncing your stuff like music, pictures, calendars etc across your Apple devices (iPod, iPhone, iMac etc). ? Amazon¡¯s Kindle cloud computers are good at storing and syncing the eBooks you buy from Amazon.
  • 14. Continue.... ? Some of the biggest cloud computing services are Web- based e-mail. It also means that your e-mail is accessible from anywhere. ? Recently nation¡¯s health IT infrastructure selected a cloud computing platform to manage the selection and implementation of Electronic Health Record (EHR) systems across the country.