Sahil Chug @sahil_guitar

Software Developer@P3InfotechP3InfotechP3InfotechP3Infotech Solutions Solutions Solutions Solutions PvtPvtPvtPvtLtd. Ltd. Ltd. Ltd. hhhhttp://p3infotech.inttp://p3infotech.inttp://p3infotech.inttp://p3infotech.in

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� Introduction to cloud computing

� 3 case studies

� Everything is in context of AWS (Amazon Web Services)

� Auto scaling groups

� AWS S3 Service

� AWS CloudFront

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� A model for enabling convenient, on-demand network access to a shared pool of configurable computing resources (e.g., networks, servers, storage, applications, and services) that can be rapidly provisioned and released with minimal management effort or service provider interaction.”

Highlighting Points:Highlighting Points:Highlighting Points:Highlighting Points:� Pay as you goPay as you goPay as you goPay as you go

� use use use use ofofofof computing computing computing computing resources resources resources resources (hardware and software) that are (hardware and software) that are (hardware and software) that are (hardware and software) that are delivered as a service over delivered as a service over delivered as a service over delivered as a service over a networka networka networka network (typically the(typically the(typically the(typically the InternetInternetInternetInternet))))

� High Availability and ScalabilityHigh Availability and ScalabilityHigh Availability and ScalabilityHigh Availability and Scalability

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An EC2 instance is virtual An EC2 instance is virtual An EC2 instance is virtual An EC2 instance is virtual machine, sitting in a machine, sitting in a machine, sitting in a machine, sitting in a physical server, together physical server, together physical server, together physical server, together with other virtual with other virtual with other virtual with other virtual machinesmachinesmachinesmachines....

An EBS is a Block storage An EBS is a Block storage An EBS is a Block storage An EBS is a Block storage level volume attached to level volume attached to level volume attached to level volume attached to an EC2 Instancean EC2 Instancean EC2 Instancean EC2 Instance

Just some 100 usersJust some 100 usersJust some 100 usersJust some 100 users

User

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� Well this was just an introduction scenario

� Your Application starts getting more users

� And You have to scale up scale up scale up scale up !

ItemItemItemItem Usage(GB)Usage(GB)Usage(GB)Usage(GB) RunningRunningRunningRunning Cost Per Cost Per Cost Per Cost Per monthmonthmonthmonth

EC2 instance linuxmedium

NA $87.2

EBS (Storage+WebServer)

20 $2.20

Storage - S3 - Static Data (photos)

10 $1.25

Network traffic (download only)

10 $1.90

TotalTotalTotalTotal $92.95$92.95$92.95$92.95

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Simple Shared Simple Shared Simple Shared Simple Shared StorageStorageStorageStorage

Auto Scaling Auto Scaling Auto Scaling Auto Scaling GroupsGroupsGroupsGroups

Some 10000 Some 10000 Some 10000 Some 10000 UsersUsersUsersUsers

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� Scalability� Auto-Scaling Groups� Different scenarios for configuring Auto-Scaling groups� Why use S3?� Store static content like images, videos, audios files, documents , transaction records for an e commerce application, server logs

� Shared storage among EC2 so saves copying of similar data multiple times

� S3 will make multiple copies of your data across availability zones hence Highly durable

� Store transaction logs of few months � NOTE: S3 is an objects storage not block storage(WORM) Write once Read many

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ItemItemItemItem NoNoNoNo Storage (GB)Storage (GB)Storage (GB)Storage (GB) Running cost Running cost Running cost Running cost per month($)per month($)per month($)per month($)

EC2 Instance-(Medium linuxWeb servers)

4 N/A $348.8

EBS Storage - Webserver (all 4 instances)

4 20 each $8.40

ec2 instance - Medium (for database)

1 N/A $87.2

EBS Storage - Database 1 40 $4.40

Storage - S3 - Static Data (photos/Transaction Records)

NA 10 $1.25

ELB 20 $20.60

TotalTotalTotalTotal $ 470.85$ 470.85$ 470.85$ 470.85

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Availability Availability Availability Availability Zone 1Zone 1Zone 1Zone 1

Availability Availability Availability Availability Zone2Zone2Zone2Zone2

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Content DistributionContent DistributionContent DistributionContent Distribution

39 Edge locations 39 Edge locations 39 Edge locations 39 Edge locations across globeacross globeacross globeacross globe

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� Availability zones

� How to Scale UP and Scale OUT

� Master Slave DB

� Amazon CloudFront:

� Edge locations caches your content so avoids request to S3 or any other origin of your data.

� Improves customer experience with faster page loads especially for mobile users with limited bandwidth

� There are certain SEO benefits also involved: There are certain SEO benefits also involved: There are certain SEO benefits also involved: There are certain SEO benefits also involved: A study at googleshowed that every ½ second of page load time dropped customer traffic by 20%.Google factors in page load times in their quality score.

� CloudFront users: IMDB, Playfish(gaming company)

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