Best Practices for Surviving Outages
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Best Practices for Surviving Outages Designing and implementing a High Availability and Disaster Recovery strategy Sal Cardello, Director of Pro Services Matt Dolian, System Engineer Avroham Katz, System Engineer
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Site disruptions happen, often when you least expect. When your business depends on application uptime or access to critical data, a strategy for high availability (HA) and disaster recovery (DR) is essential. Carefully considering how to architect and successfully implement an HA and DR strategy helps ensure that you minimize risk, strengthen fault tolerance, and rapidly re-deploy your application and data in case of a disruption. This presentation walks through an overview of HA and DR, and offers some best practices from the Engine Yard team. The full on-demand webcast can be viewed here: http://pages.engineyard.com/BestPracticesforSurvivingOutagesWebcast.html
Transcript of Best Practices for Surviving Outages
Best Practices for Surviving OutagesDesigning and implementing a High Availability and Disaster Recovery strategy
Sal Cardello, Director of Pro Services
Matt Dolian, System Engineer
Avroham Katz, System Engineer
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Disaster Recovery
Photo credit: naturaldisasterss.com/wp-content/uploads/2011/12/Natural-Disaster-Images.jpg
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0 - No off-site data
1 - Data backup with no hot site
2 - Data backup with hot site
3 - Electronic vaulting
4 - Point-in-time copies
5 - Transaction integrity
6 - Zero or near-Zero data loss
7 - Highly automated, business integrated solution
Tiers of Disaster Recovery
Citation: http://en.wikipedia.org/wiki/Seven_tiers_of_disaster_recovery
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Definition: High Availability
“Design approach & associated service implementation that ensures a pre-arranged level of operational performance will be met during a contractual measurement period”
Citation: ttp://en.wikipedia.org/wiki/High_availability
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High Availability Architecture
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Why implement HA?
Best Practices for High Availability
7Photo Credit: http://bit.ly/z9OEwG
Environment Analysis
Geographic Mirroring
Database Replication
Store Assets Replication
Validate Synchronization
Escalation Plan
Test
Launch
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• Environment Specific Configurations
• Asset Hosting
• Page Caching
• Other Data Stores
• Background Processing
• Cron Jobs
Application Considerations
Photo credit: http://www.flickr.com/photos/dseneste/5912382808/
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1. Client contacted per terms of SLA
2. Engine Yard syncs database and performs manual failover
3. Redundant database promoted to master
4. DNS is updated
5. Replication to former master is re-established
Failover Process at Engine Yard
Manual, customer owned decision
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Questions?
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Get in touch
Contact us: Sal Cardello, Director of Pro [email protected]
Learn more:http://www.engineyard.com/services
