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B8: Building and Deploying a HighlyAvailable Application

David Eddy Senior Solution Consultant

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© 2008 Progress Software Corporation2

What part is the most important?

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Agenda

Highly Available Application (HAA) – what it

means today & tomorrow

Definitions

Levels of Recovery

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HAA – What is it?

Ensuring the complete application is 100%

available during the required business time

Meeting Business Needs

• Recovery Time Objective (RTO)

• Recovery Point Objective (RPO)

Eliminating all Single Point of Failures (SPF)

Including as many TLA’s as possible in onepresentation…

(TLA = Three Letter Acronyms)

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Where does a Highly Available Applicationstart?

Development

Development Deployment Management

Application development & deployment timeline

Deployment

Management

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Where does a Highly Available Applicationstart?

Development Deployment Management

Application development & deployment timeline

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http://slidepdf.com/reader/full/maths333 7/33© 2008 Progress Software Corporation7

What does a HAA look like to the user?

The application is always available*

Performance is always acceptable

Data is NEVER lost

New functionality is timely

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Definitions: High Availability (HA)

“… high availability refers to a system or component that is

continuously operational for a desirably long length of time. Availability can be measured relative to "100% operational" or "never

failing." A widely-held but difficult-to-achieve standard of availability

for a system or product is known as "five 9s" (99.999 percent) ...”

Reliability OK For Expected

Outages/Year

Three 9's 99.9% Homes 9 hours

Four 9's 99.99% Factories 59 minutes

Five 9's 99.999% Hospitals 5 minutes

Six 9's 99.9999% Banks 32 seconds

Seven 9's 99.99999% Digital Markets 30 msec

(Source: http://searchdatacenter.techtarget.com/sDefinition/0,,sid80_gci761219,00.html# )

(Source: http://www.cps-corp.net/9s.htm )

http://searchdatacenter.techtarget.com/sDefinition/0,,sid80_gci761219,00.html

http://www.cps-corp.net/9s.htm




http://searchdatacenter.techtarget.com/sDefinition/0,,sid80_gci761219,00.html

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Agenda

Highly Available Application ( HAA) – what it


Definitions

Levels of Recovery

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Definitions: Complete Application

User Interface

Middleware (Application Server / Sonic™)

Data (database)

Common Infrastructure

Presentation

Business Services

Data Access

Data Sources

C omm onI nf r a s t r u c t ur e

Enterprise Services

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Definitions: Complete Application An Example

User Interface

Middleware (Application Server / Sonic)

Data (database)

User Interface

Application Server

Data Access

Databases

O p er a t i on

s / HW

ESB

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Definitions: The Example Application

4 Application Configurations

• Hosted (single server)

• Client Server

• N-Tier

• SaaS

User Interface

Application Server

Databases

O p s / HW

ESB

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Logical vs. Physical Outlook

AS

AS

DB

AS

AS

W e b

S v r

W e b

S v r

WS

WS

DB

AS

AS

W e b

S v r

WS

AS

AS

WS

Client / Server

N-Tier SaaS

Hosted (Single Server)

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Agenda

Highly Available Application ( HAA) – what it


Definitions

Levels of Recovery

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Levels of Recovery

Level 1: Bicycle Recovery

Level 2: VW Recovery

Level 3: Race Car Recovery

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Level 1: Business Case

Easiest environment to work in

RTO and RPO < 1 day

Typically

• Host-based

• Client-Server

Development left to the Application Partner

(usually)

Cost Scale:

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Level 1: Technology Dependence

NO RPO or RTO

Have never had an incident

Not using their existing resources

Don’t rely completely on technology!

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Level 1: Technology Choices

Backup

• Infrastructure

– Hardware

– Software

• Application

– Configuration files

– Properties files

Where is your recovery location?

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Level 2: Business case

RTO and RPO < 60 minutes

Typically

• Host-based

• Client-server

• N-tier

Development shared between AP and User

Deployment shared as well

Cost Scale:

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Level 2: Choosing The Right Tool

Which tool would you choose…

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After imaging

Replication or clusters

SAN solutions

Recovery offsite?

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Level 3: Business Case

RTO and RPO < 5 minutes

Typically

• All Deployment Models (Host-based, Client-

server, N-tier, SaaS)

Real-time and near real-time

Large development organization

Deployment important (and difficult)

Cost Scale:

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Level 3: Thinking Ahead Of The Game

Rick Mears

• 4 Time Indianapolis 500 winner

• 6 Times – Poll position

• 11 Times – Front row

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Replication

Clusters

SAN solution with complete redundancy Sonic ESB / CAA

L l 3 T h l Ch i

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Backup

(Site 2)

OpenEdge Replication

Application

Server

(Site 2)

W e b S e r v e r

N am

e S e r v e r

( L o a d b al an c i n g )

Client

Application

Server(Site 1)

Reporting

N am e S e r v e

r


Production

(Site 1)

User Interface

Application Server Tier

Data Tier

Direct Connect

TCP/IP

SQL

Level 3: Technology Choices: Application Availability – eliminating SPFs

Client

Enterprise

Services

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Level 3: Technology Choices: Sonic CAA

Q2

Q1

Q2a

Q1a

Level 3: Technology Choices:

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W e b S e r v e r

N am e S e r v e r


Client

Application

Server(Site 1)

Application

Server

(Site 2)Reporting

Backup

(Site 2)

N am e S e r v e

r


Production

(Site 1)

User Interface

Application Server Tier

Data Tier

Direct Connect

TCP/IP

OpenEdge Replication

SQL

Level 3: Technology Choices:SaaS – Same Rules Apply except Web Server

Client

Enterprise

Services

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Wrap-up

Recovery

Level

Business

Requirements

Technology Requirements

1 < One Day Backup of complete system(s)

Utilize exiting tools

Dev & Depl not critical (mostly done by AP)

All architectures apply

2 < 60 Minutes Duplicate HW – Available and loaded

Some existing and possibly new tools

Dev shared, Depl & Maint. in-house


3 < 5 Minutes Complete Redundancy (total HA) Advanced tools required

Complete cycle critical (Dev, Depl, Maint.)


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Summary

Business Requirements are critical!

Different

• Architectures

• Levels of recovery

• Business Requirements

• Solutions

It is the complete process• Development, Deployment, Maintenance

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For More Information

Sonic CAAhttp://www.psdn.com

OpenEdge Reference Architecture

http://www.psdn.com/library/kbcategory.jspa?categoryID=230

Disaster Recovery Resourceshttp://www.attanium.net

http://www.redorbit.com/news/technology/507076/uk_emergency_p

reparedness_a_step_in_the_right_direction/index.html http://www.emdat.be

http://www.psdn.com/

http://www.attanium.net/

http://www.redorbit.com/news/technology/507076/uk_emergency_preparedness_a_step_in_the_right_direction/index.html


http://www.emdat.be/

http://www.emdat.be/



http://www.attanium.net/

http://www.psdn.com/

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Questions?

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Thank You

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