OPS-13: Building and Deploying a Highly Available Application Brian Bowman Sr. Solution Engineer

OPS-13: Building and Deploying a Highly Available Application

Brian Bowman Sr. Solution Engineer

© 2008 Progress Software Corporation2 OPS-13: Building & Deploying a Highly Available Application

What part is the most important?


Agenda

Highly Available Application (HAA) – what it means today & tomorrow

Definitions Levels of Recovery


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 one

presentation…

(TLA = Three Letter Acronyms)


Where does a Highly Available Application start?

Development

Development Deployment Management

Application development & deployment timeline

Deployment

Management


Where does a Highly Available Application start?

Development Deployment Management

Application development & deployment timeline


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


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)


Agenda

Highly Available Application ( HAA) – what it means today & tomorrow



Definitions: Complete Application

User Interface Middleware (Application Server / Sonic™) Data (database) Common Infrastructure

PresentationPresentation

Business ServicesBusiness Services

Data AccessData Access

Data SourcesData Sources

Co

mm

on

Infrastru

cture

Co

mm

on

Infrastru

cture

Enterprise ServicesEnterprise Services


Definitions: Complete Application An Example

User Interface Middleware (Application Server / Sonic) Data (database)

User InterfaceUser Interface

Application ServerApplication Server

Data AccessData Access

DatabasesDatabases

Op

eration

s / HW

Op

eration

s / HW

ESBESB


Definitions: The Example Application

4 Application Configurations• Hosted (single server)

• Client Server

• N-Tier

• SaaS

User InterfaceUser Interface

Application ServerApplication Server

DatabasesDatabases

Op

s / HW

Op

s / HW

ESBESB


Logical vs. Physical Outlook

AS

ASDB

AS

AS

Web

S

vrW

eb

Svr

WS

WS

DB

AS

AS

Web

S

vr

WS

AS

AS

WS

Client / Server

N-TierSaaS

Hosted (Single Server)


Agenda

Highly Available Application ( HAA) – what it means today & tomorrow



Levels of Recovery

Level 1: Bicycle Recovery

Level 2: VW Recovery

Level 3: Race Car Recovery


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:


Level 1: Technology Dependence

NO RPO or RTO Have never had an incident Not using their existing resources

Don’t rely completely on technology!


Level 1: Technology Choices

Backup • Infrastructure

– Hardware– Software

• Application– Configuration files– Properties files

Where is your recovery location?


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:


Level 2: Choosing The Right Tool

Which tool would you choose…



After imaging Replication or clusters SAN solutions Recovery offsite?


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:


Level 3: Thinking Ahead Of The Game

Rick Mears • 4 Time Indianapolis 500 winner

• 6 Times – Poll position

• 11 Times – Front row



Replication Clusters SAN solution with complete redundancy Sonic ESB / CAA


Backup(Site 2)

OpenEdge Replication

ApplicationServer(Site 2)

Web Server

Nam

e Server

(Load b

alancin

g)Client


Reporting

Nam

e Server

(Load b

alancin

g)

Production(Site 1)

User Interface

Application Server Tier

Data Tier

Direct Connect

TCP/IP

SQL

Level 3: Technology Choices: Application Availability – eliminating SPFs

Client

EnterpriseServices


Level 3: Technology Choices: Sonic CAA

Q2

Q1

Q2a

Q1a


Web Server

Nam

e Server

(Load b

alancin

g)Client


ApplicationServer(Site 2)Reporting

Backup(Site 2)

Nam

e Server

(Load b

alancin

g)

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

EnterpriseServices


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.)



Summary

Business Requirements are critical! Different

• Architectures

• Levels of recovery

• Business Requirements

• Solutions

It is the complete process• Development, Deployment, Maintenance


For More Information

Sonic CAAhttp://www.psdn.com

OpenEdge Reference Architecturehttp://www.psdn.com/library/kbcategory.jspa?categoryID=230

Disaster Recovery Resourceshttp://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


Questions?


Thank You


Documents

OPS-13: Building and Deploying a Highly Available Application Brian Bowman Sr. Solution Engineer