Cloud computing

Cloud computing
Islam shaheen
Shireef fadel
Khedr fathy

The story
• Computers have internal or hard drive
storage(C: Drive)
• CPU has a drive for storing programs,
documents, pictures, videos, presentations,
etc…
Standard Computer Tower
or Central Processing Unit
(CPU)
Inside the Computer

Internal Storage
• Content is stored on THAT computer
• To use content must return to THAT computer
• Cannot access this content from another
device or computer

Programs
• Purchase programs
• Load to the computer
• Each computer would need the program
loaded and stored on the internal drive

External Storage
External Hard DriveCD/DVD Thumb Drive
SD Card Micro SD Card
Allows your content to become mobile
Save to the storage device
Take device to any compatible computer
Open and use content

Networked Storage
• Multiple work stations talk to one unit that
stores information and data.
• Data is not saved to the C: drive, but to a
network drive
• Can retrieve the data stored to the network
from any of the connected workstations.

What is Cloud Computing
• Shared pool of configurable computing resources
• On-demand network access
• Provisioned by the Service Provider
7 Adopted from: Effectively and Securely Using the Cloud Computing Paradigm by peter Mell, Tim Grance

What is Cloud Computing?
• Cloud Computing is a general term used to describe a new
class of network based computing that takes place over the
Internet,
– basically a step on from Utility Computing
– a collection/group of integrated and networked hardware,
software and Internet infrastructure (called a platform).
– Using the Internet for communication and transport
provides hardware, software and networking services to
clients
• 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).
8

What is Cloud Computing?
• In addition, the platform provides on demand
services, that are always on, anywhere,
anytime and any place.
• Pay for use and as needed, elastic
– scale up and down in capacity and functionalities
• The hardware and software services are
available to
– general public, enterprises, corporations and
businesses markets
9

Cloud Summary
• Cloud computing is an umbrella term used to refer to
Internet based development and services
• A number of characteristics define cloud data,
applications services and infrastructure:
– Remotely hosted: Services or data are hosted on remote
infrastructure.
– Ubiquitous: Services or data are available from anywhere.
– 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!
10

Types of services
• SaaS – Software as a Service
• IaaS – Infrastructure as a Service
• PaaS – Platform as a Service
• DaaS – Desktop as a Service

type of service
• Software as a Service (SaaS) is a software
distribution model in which applications
are hosted by a vendor or service
provider and made available to
customers over a network, typically the
Internet. http://searchcloudcomputing.techtarget.com/definition/Software-as-a-Service

types of service
•Platform as a Service (PaaS) is a way to rent
hardware, operating systems, storage and
network capacity over the Internet. The service
delivery model allows the customer to rent
virtualized servers and associated services for
running existing applications or developing and
testing new ones.

types of service
• Infrastructure as a Service (IaaS) is a
provision model in which an organization
outsources the equipment used to
support operations, including storage,
hardware, servers and networking
components. The service provider owns
the equipment and is responsible for
housing, running and maintaining it. The
client typically pays on a per-use basis.

LBS Based on Cloud
Data +
Intelligence
Third Party
Services
Microsoft
Services
Data as a Service
-- sharing

LBS Based on Cloud
Data +
Intelligence
Third Party
Services
Microsoft
Services
Data as a Service
Data Information  Knowledge  Intelligence

LBS Based on Cloud
Cloud Computing =
Software as a Service +
Platform as a Service +
Infrastructure as a Service
+
Data as a ServicePlatform as a Service
Infrastructure as a Service
Software
End Users
Client Platform (Windows)
LBS providers (Cloud Users)
Ecosystem & Dev Tools
+ Services
Clients
+ Cloud

Some Commercial Cloud
Offerings
21

Advantages of Cloud Computing
• Lower computer costs:
– You do not need a high-powered and high-priced computer
to run cloud computing's web-based applications.
– 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.
– When you are using web-based applications, your PC can be
less expensive, with a smaller hard disk, less memory, more
efficient processor...
– 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.
22

• Improved performance:
– With few large programs hogging your computer's
memory, you will see better performance from your PC.
– Computers in a cloud computing system boot and run
faster because they have fewer programs and processes
loaded into memory…
• Reduced software costs:
– Instead of purchasing expensive software applications, you
can get most of what you need for free-ish!
• most cloud computing applications today, such as the Google Docs suite.
– better than paying for similar commercial software
• which alone may be justification for switching to cloud applications.
23

• Instant software updates:
– Another advantage to cloud computing is that you are no longer faced
with choosing between obsolete software and high upgrade costs.
– When the application is web-based, updates happen automatically
• available the next time you log into the cloud.
– When you access a web-based application, you get the latest version
• without needing to pay for or download an upgrade.
• Improved document format compatibility.
– You do not have to worry about the documents you create on your
machine being compatible with other users' applications or OSes
– There are potentially no format incompatibilities when everyone is
sharing documents and applications in the cloud.
24

• Unlimited storage capacity:
– Cloud computing offers virtually limitless storage.
– Your computer's current 1 Tbyte hard drive is small compared
to the hundreds of Pbytes available in the cloud.
• Increased data reliability:
– 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.
if your personal computer crashes, all your data is still out
there in the cloud, still accessible
– 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!
25

• Universal document access:
– That is not a problem with cloud computing, because you
do not take your documents with you.
– Instead, they stay in the cloud, and you can access them
whenever you have a computer and an Internet connection
– Documents are instantly available from wherever you are
• Latest version availability:
– When you edit a document at home, that edited version is
what you see when you access the document at work.
– The cloud always hosts the latest version of your
documents
• as long as you are connected, you are not in danger of having an outdated
version
26

• Easier group collaboration:
– Sharing documents leads directly to better collaboration.
– Many users do this as it is an important advantages of cloud
computing
• multiple users can collaborate easily on documents and projects
• Device independence.
– You are no longer tethered to a single computer or network.
– Changes to computers, applications and documents follow
you through the cloud.
– Move to a portable device, and your applications and
documents are still available.
27

Disadvantages of Cloud Computing
• Requires a constant Internet connection:
– Cloud computing is impossible if you cannot connect to
the Internet.
– 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.
– A dead Internet connection means no work and in areas
where Internet connections are few or inherently
unreliable, this could be a deal-breaker.
28

• Does not work well with low-speed connections:
– Similarly, a low-speed Internet connection, such as that
found with dial-up services, makes cloud computing
painful at best and often impossible.
– Web-based applications require a lot of bandwidth to
download, as do large documents.
• Features might be limited:
– This situation is bound to change, but today many web-
based applications simply are not as full-featured as their
desktop-based applications.
• For example, you can do a lot more with Microsoft PowerPoint
than with Google Presentation's web-based offering
29

• Can be slow:
– Even with a fast connection, web-based applications can
sometimes be slower than accessing a similar software
program on your desktop PC.
– 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.
– 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.
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• Stored data might not be secure:
– With cloud computing, all your data is stored on the cloud.
• The questions is How secure is the cloud?
– Can unauthorised users gain access to your confidential data?
• Stored data can be lost:
– Theoretically, data stored in the cloud is safe, replicated
across multiple machines.
– But on the off chance that your data goes missing, you have
no physical or local backup.
• Put simply, relying on the cloud puts you at risk if the cloud lets you
down.
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• HPC Systems:
– Not clear that you can run compute-intensive HPC
applications that use MPI/OpenMP!
– Scheduling is important with this type of application
as you want all the VM to be co-located to minimize
communication latency!
• General Concerns:
– Each cloud systems uses different protocols and different
APIs
• may not be possible to run applications between cloud
based systems
– Amazon has created its own DB system (not SQL 92), and
workflow system (many popular workflow systems out there)
• so your normal applications will have to be adapted to
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Conclusion
• Cloud Computing is outpacing the IT industry
• Real business value can be realized by customers of all sizes
• Cloud solutions are simple to acquire, don’t require long
term contracts and are easier to scale up and down as
needed
• Proper planning and migration services are needed to
ensure a successful implementation
• Public and Private Clouds can be deployed together to
leverage the best of both
• Third party monitoring services ensure customer are
getting the most out of their cloud environment
• Security Compliance and Monitoring is achievable with
careful planning and analysis

Cloud computing

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