Windows Azure Computing

8/3/2019 Windows Azure Computing

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Microsoft Cloud Computing


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Topics to be covered

1. Environmental Features of windows azure

2. What is Cloud Computing

3. Roles in Cloud Computing

4. Benefits of Cloud Computing

5. Optimal Cloud workload Pattern

6. Service Delivery Models

7. Azure Architecture (Intro)

1. .Net in Windows Azure

2. PHP in Windows Azure

3. JAVA and Tomcat in Windows Azure

8. Cloud Application Development and Hosting


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Environmental Features of windows azure

Compute instance types: Web Role &

Worker Role. Windows Azure applications

are built with web role instances, worker

role instances, or a combination of both.

Each instance runs

on its own VM

(virtual machine),

replicated as needed

The Fabric Controller communicates with every serverwithin the Fabric. It manages Windows Azure, monitors

every application, decides where new applications shouldrun optimizing hardware utilization.

Development, service hosting, & management environment

.NET, Java PHP, Python, Ruby, native code (C/C++, Win32, etc.)

ASP.NET providers, FastCGI, memcached, MySQL, Tomcat

Full-trust supports standard languages and APIs

Secure certificate store

Management APIs, and logging and diagnostics systems

Multiple roles Web, Worker, Virtual Machine (VHD)

Multiple VM sizes

1.6 GHz CPU x64, 1.75GB RAM, 100Mbps network, 250GB volatile st

orage

Small (1X), Medium (2X), Large (4X), X-Large (8X)

In-place rolling upgrades, organized by upgrade domains

Walk each upgrade domain one at a time

Operating system as an online service; with automated provisioning andservices management

Maintenance OS

Host VMGuest VM 1

Host VM

Guest VM 3Guest VM 2Guest VM 1

Host VM


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Cloud Computing Windows Azure compute provides developers a platform to host and manage applications in Microsofts

data centers across the globe.

Quincy, WA Chicago, IL San Antonio, TX Dublin, Ireland Generation 4 DCs


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Cloud Computing

A Windows Azure application is built from one or more components called

Roles. Roles come in three different types:1. Web role,

2. Worker role

3. Virtual Machine (VM) role.


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Roles in Cloud Computing

Web Role - A Windows Azure Web role is used for hosting front-end web applications behind Internet

Information Services (IIS).

Worker Role - A Worker can run anything but is most commonly used to host background processingbehind a web role.

VM Role - A VM role is a special type of role that enables you to define the configuration and updates ofthe operating system for the virtual machine. While a web role and a worker role run in a virtual machine,the VM role is the virtual machine, which gives you full control of operations. When you have long and

complicated installations in the operating system or special setup issues, you should use this role. Thisrole is especially suited for migrating existing applications to run as hosted services in Windows Azure.This VHD is created using an on-premises Windows Server machine and then uploaded to WindowsAzure.

More on VM

Windows Azure Web and Worker roles enable developers to deploy and manage applications services as a

whole as opposed to individual Virtual Machines (VMs). Its common for an application to interact with usersthrough a Web role, then hand tasks off to a Worker role for processing.
http://www.microsoft.com/windowsazure/features/virtualmachines/http://www.microsoft.com/windowsazure/features/virtualmachines/


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.NET in Windows AzureWeb Role and Worker Role

Service Instance

Service Instance

Worker RoleWeb Role

FabricController

LoadBalancer

TableStorage

BlobStorage

Queue

ServiceBus

AccessControl

SQLDatabase

bind port(x)

http:

//ins

tance:x

http:

//ins

tance:y

http://app:80

default.aspx

IISRoleEntry

Point


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Benefits of Cloud Computing

A great application hosting environmentSince the Windows Azure Web role is pre-configured with IIS7, its easy to create applications using ASP.NET,Windows Communication Foundation (WCF) or other web technologies. Developers can also createapplications using languages such as PHP and Java.

Presentation ASP.NET C#, WCF, PHP, Java

Distributed in-memory cache

Services .NET C#, Java, native code Distributed in-memory cache Asynchronous processes Distributed parallel processes Transient file storage


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Benefits of Cloud computing

Focus on the application, not the operational constraintsThe automated service management provided by Windows Azure offers customers the benefits of:

Administration: Windows Azure automatically takes care of things such as load balancing and failoverthereby reducing the effort and cost of administering the application environment.

Availability: Windows Azure is designed to let developers build applications that are continuously available,even in the face of software upgrades and hardware failures.

Scalability: Windows Azure enables developers to build scalable applications that run in Microsofts globaldata centers. It also allows developers to scale down applications when necessary, letting them use just theresources they need.


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Optimal Cloud Workload Patterns

UsageCompute

Time

Average

Inactivity

Period

On and Off

Compute

Time

Unpredictable Bursting

Average Usage

Average UsageCompute

Time

Growing Fast

Compute

Time

Average Usage

Predictable Bursting


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Enable communication between role instancesThe role instances in a hosted service communicate through internal and external connections that varydepending on the type of communication that is needed. Role instances can make these connections byusing HTTP, HTTPS and Microsoft .NET APIs for TCP/IP sockets. An external connection is called an inputendpoint, and an internal connection is called an internal endpoint. Endpoints are associated with ports,where the external endpoint is associated to a port that you define, and the internal endpoints aredynamically assigned ports by Windows Azure.

Start tasks before role instances start

You can use startup tasks to perform operations before the role instances start. Operations that you mightwant to perform include installing a component, registering COM components, setting registry keys, orstarting a long running process. You add startup tasks to the role by defining the tasks in theServiceDefinition.csdef file.


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Flexible instances sizes to meet your application needsEach Windows Azure compute instance represents a virtual server. Although many resources are dedicated toa particular instance, some resources associated to I/O performance are shared among the computeinstances on the same physical host.

Compute instance sizes with a high I/O performance indicator as noted in the table will have a largerallocation of the shared resources. Having a larger allocation of the shared resource will also result in moreconsistent I/O performance.

Compute Instance

SizeCPU Memory Instance Storage I/O Performance Cost Per Hour

Extra Small 1.0 GHz 768 MB 20 GB Low $0.04

Small 1.6 GHz 1.75 GB 225 GB Moderate $0.12

Medium 2 x 1.6 GHz 3.5 GB 490 GB High $0.24

Large 4 x 1.6 GHz 7 GB 1,000 GB High $0.48

Extra Large 8 x 1.6 GHz 14 GB 2,040 GB High $0.96


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Benefits of Cloud Computing

BUSINESSDEMANDS TECHOLOGYDEMANDS WINDOWS AZUREPLATFORM OFFERS

Cost-effective solution to manage IT resources Less infrastructure to buy/configure and support Lower TCO Predictable cost

Focus on delivering compelling softwarenoton managing infrastructure

Monetize new offering quickly withoutinvestment in billing and other enablementtechnologies.

Speed of development Interoperability Leverage existing IP

Simplified deployment Scale up or down as business needs change Go to market faster

Reliable service SLAs Security Global data centers

Lower costs Efficiency

StayCompetitive

Innovation

AgilityGenerate New

Revenue Quickly

ReliabilityReduced

Risk


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(On-Premise)

Infrastructure(as a Service)

Platform(as a Service)

Service Delivery Models

Storage

Servers

Networking

O/S

Middleware

Virtualization

Data

Applications

Runtime

Storage

Servers

Networking

O/S

Middleware

Virtualization

Data

Applications

Runtime

Youmanage M

anaged

byvendor

Ma

nagedbyvendor

Youma

nage

Youmanage

Storage

Servers

Networking

O/S

Middleware

Virtualization

Applications

Runtime

Data

Software(as a Service)

Managedbyve

ndor

Storage

Servers

Networking

O/S

Middleware

Virtualization

Applications

Runtime

Data


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Service Instance

Service Instance

Web Role

PHP in Windows Azure

FabricController

LoadBalancer

TableStorage

BlobStorage

Queue

ServiceBus

AccessControl

SQL

Database

bind port(x)

http:

//ins

ta

nce:x

http:

//ins

ta

nce:y

http://app:80

index.php

Web Role and IIS/FastCGI with Native Runtime

php-cgi

IIS

FastCGI


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Service Instance

Service Instance

Worker Role

Java and Tomcat in Windows Azure

RoleEntryPoint

Sub-Process

JVM

Tomcat

server.xmlCatalina

FabricController

LoadBalancer

TableStorage

BlobStorage

Queue

ServiceBus

AccessControl

SQL

Database

new Process()

bind port(x)

http:

//ins

ta

nce:x

http:

//ins

ta

nce:y

listen port(x)

http://app:80

get

runtime

info

index.jsp

Worker Role and Sub-Process Invoking Native Code
http://en.wikipedia.org/wiki/File:Tomcat.png

Documents

Windows Azure Computing