cloud computing , content delivery networks and operating

8/9/2019 Cloud Computing , Content Delivery Networks and Operating

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Presented By

Ankur Bhambotta


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` The term cloudis used as a metaphor for the

Internet, based on the cloud drawing used to

represent the telephone network, and Internetin computer network diagrams as an abstraction of

the underlying infrastructure it represents


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Cloud computing is Internet based computing

whereby shared resources, software and information

are provided to computer

sand other dev

ice

son-demand, like a public utility.

Technical definition is "a computing capability that

provides an abstraction between the computing

resource and its underlying technical architecture

(e.g., servers, storage, networks


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Cloud computing diag.


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Acloud clientconsists of computerhardware and/or computersoftware that relies on cloud

computing for application delivery, or that isspecifically

designed for delivery of cloud services.

Cloud application services or "Software as a Service

(SaaS)" deliversoftware as a service over the Internet,

eliminating the need to install and run the application on the

customer's own computers and simplifying maintenance

and support.


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Cloud platform services or "Platform as a Service

(PaaS)" deliver a computing platform orsolutionstack as a service . It facilitates deployment of

applications without the cost and complexity of buying

and managing the underlying hardware and software

layer

Cloud infrastructure services or "Infrastructure as a

Service (IaaS)" delivers computerinfrastructur as a

serv

ice. Rather than purcha

sing

server

s,software, datacenterspace or network equipment, clientsinstead buy

those resources as a fully outsourced service .


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The servers layer consists of computer

hardware and computersoftware products that are

specifically designed for the delivery of cloud services,

including multi-combined processors, cloud-specific

operating systems and combined offerings .


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Community cloud

` A community cloudmay be established where several

organizations have similar requirements and seek toshare infrastructure so as to realize some of the benefits

of cloud computing. With the costsspread over fewer

users this option is more expensive but may offer a

higher level of privacy, security and policy compliance.

Examples ofcommunity cloudinclude Google's "GovCloud"


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Hybrid cloud

A hybrid cloudenvironment consisting of multiple internal

and/or external providers. By integrating multiple cloud

services users may be able to ease the transition topublic

cloudservices.

Private cloudPrivate cloudand internal cloudare neologisms that some

vendors have recently emulate cloud computing on private

networks. These products claim to "deliversome benefits of

cloud computing without the pitfalls", capitalising on data

security, corporate governance, and reliability concerns.


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` A content delivery network orcontent distribution

network (CDN) is a system of computers containing

copies of data, placed at various pointsin a network so

as to maximize bandwidth for access to the data from

clients throughout the network .

` A client accesses a copy of the data near to the client, as

opposed to all clients accessing the same central server,

so as to avoid bottleneck near that server.


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Strateg

ically placed edge

server

sdecrea

se the load oninterconnects, and backbones, freeing up capacity and

lowering delivery costs. Instead of loading all traffic on a

backbone , a CDN can offload these by redirecting traffic to

edge servers

CDNs generally deliver content over TCP and UDP

connections. TCP throughput over a network isimpacted by

both latency and packet loss. To avoid thisCDNs traditionally

place servers as close to the edge networks that users are on

.


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CDNs can dynamically distribute assets to strategically placed redundant

core, fallback and edge servers. CDNs can have automatic server

availability sensing with instant user redirection.ACDN can offer100% availability, even with large power, network or hardware outage

CDN technologies give more control of asset delivery and network load.

They can optimize capacity per customer, provide views of real-time load

and statistics, reveal which assets are popular, show active regions andreport exact viewing details to the customers .


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` Web caches

store popular content on servers that have the

greatest demand for the content requested. Theseshared network appliances reduce bandwidth

requirements, reduce server load, and improve the

client response times for content stored in the

cache


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Server-load balancing

Traffic arriving at the switch is directed to one of the

real web servers attached to the switch. This has the

advantages of balancing load, increasing total

capacity,

improv

ing

scalab

ility, and prov

idingincreased reliability by redistributing the load of a

failed web server and providing server health

checks.


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Request routing

Directs client requests to the content source best able to

serve the request. This may involve directing a client

request to the service node that is closest to the client, or to

the one with the most capacity


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` AMobile operating system, also known as a

Mobile OS, a Mobile platform, or a Handheld

operating system, is operating system that

controls a mobile device .

They are simple as compared to complex

computer operating systems.


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The increasing importance of mobile devices has

triggered intense competition among technology giants,

like Microsoft, Apple, and Nokia in a bid to capture the

bigger market share.

Palm , Research In Motion and Ericsson are also

significant firmsin the mobile platform sector.


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` Symbian OS

` iPhone OS

` RIMsBlackBerry.

` WindowsPhone.` Linux.

` Palm WebOS.

` Android

` Maemo.


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` Symbian has the largest share in most markets

worldwide, but lags behind other companiesin the

relatively small but highly visible North American market

` It has been used by many major handset

manufacturers, BenQ, Fujitsu, LG, Mitsubishi,

Motorola, Nokia, Samsung, Sharp, and

Sony Ericsson.


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` This OSis focused on easy operation and was

originally designed for business.

` Recently it hasseen a surge in third-partyapplications and has been improved to offer full

multimedia support


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` Android was developed by Google Inc..

Android is an Open Source, Linux-derived platform

backed by Google, along with major hardware and

software developers (such as Intel, HTC, ARM, and

eBay, to name a few).

` This OS, though very new, already has a cult following

among programmers eager to develop apps foritsflexible, Open Source, back end.


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` Maemo is a software platform developed by Nokia

forsmartphones . It is based on the Debian operating

system.

` Maemo is mostly based on open source code, and has

been developed by Maemo Devices within Nokia in

collaboration with many open source projectssuch asthe Linux kernel, Debian and GNOME

cloud computing , content delivery networks and operating

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