1. High Availability and Disaster Recovery

2. Outline
1. High Availability/DR Requirements
2. Cloud Environment for High Availability and DR
3. High Availability/DR Cloud Deployment Options
4. Basic Cloud Deployment Architecture
5. Intermediate Cloud Deployment Architecture
6. Advanced Cloud Deployment Architecture
7. Ultimate Cloud Deployment Architecture
8. High Availability/DR Challenges
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3. 1. High Availability/DR
Requirements
High Availability/DR Requirements
• High Availability and Disaster Recovery (DR) requirements
often overlap
• Application and Infrastructure Scalability
• New Software Version Deployment
• Transparent, Real-Time or Near Real Time Failover
• Uptime Requirements
• Disaster Recovery
• Application and Data Rollback
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4. 3. Cloud Environment for High
Availability and DR
Cloud Environment High Availability and DR
Attributes
• Unlimited Resources
• Ability to Allocate Resources on Demand
• Ability to Clone Environments
• Ability to Allocate Resources Automatically
• Geographical Dispersion
• Ability to Create Environments on Demand
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5. 4. High Availability/DR Cloud
Deployment Options
High Availability/DR Cloud Options
• High Availability and DR recommendations and options
vary in accordance with the uptime, scalability and cost
requirements
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6. 5. Basic Cloud Deployment
Architecture
The Basic Cloud Deployment Option
• Application infrastructure (Web Servers, Applications
Servers, Databases) is set up in a single Cloud Zone
• In case of a catastrophic failure, the entire environment is
restored from the back-up “image” and “storage” in a
different Cloud Zone
• In takes roughly an hour for “A” record propagation and
back-up loading
• Uptime is governed by Cloud Provider Zone availability
• A Basic Cloud Deployment option scales with an addition of
resources to the Cloud Zone
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7. 5. Basic Cloud Deployment
Architecture
The Basic Cloud Deployment Option Scheme
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8. 6. Intermediate Cloud
Deployment Architecture
The Intermediate Cloud Deployment Option
• Application infrastructure (Web Servers, Applications
Servers, Databases) is set up in a multiple Cloud Zones
• Second Cloud Zone is a scaled down copy of the main
Cloud Zone
• In case of a catastrophic failure, the unaffected Cloud zone
takes over
• It takes roughly 30 minutes to add resources to the scaled
down Cloud Zone to restore full availability
• Uptime is governed by Cloud Provider Multi-Zone
availability
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9. 6. Intermediate Cloud
Deployment Architecture
The Intermediate Cloud Deployment Option Scheme
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10. 7. Advanced Cloud Deployment
Architecture
The Advanced Cloud Deployment Option
• Application infrastructure (Web Servers, Applications Servers,
Databases) is set up in a multiple Cloud Zones
• Second Cloud Zone is a full copy of the main Cloud Zone
• In case of a catastrophic failure, the unaffected zone takes
over
• The Advanced Cloud Deployment option has virtually no
downtime, unless both Cloud zones are affected
• Uptime is governed by Cloud Provider Multi-Zone availability
• This option is expensive since it requires full Cloud zone
duplication
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11. 7. Advanced Cloud Deployment
Architecture
The Advanced Cloud Deployment Option Scheme
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12. 8. Ultimate Cloud Deployment
Architecture
The Ultimate Cloud Deployment Option
• Application infrastructure (Web Servers, Applications
Servers, Databases) is set up in a multiple Cloud Providers
• Second Cloud Provider is a full replica of the main Provider
• In case of a catastrophic failure, the unaffected Cloud
Provider takes over
• The Advanced Cloud Deployment option has virtually no
downtime, unless both Cloud Providers are affected
• This option is the most expensive one, since it requires full
duplication for using multiple Cloud Providers
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13. 8. Ultimate Cloud Deployment
Architecture
The Ultimate Cloud Deployment Option Scheme
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14. High Availability/DR Challenges
High Availability/DR Challenges
• Overall application is designed for the named resources
• Application Service Layer is not designed for clustering
• Application DB Layer is designed for a single database
• Application Database is not designed for replication
• Application Caching Strategy is designed for long data
“hoarding”
Akelios helps you overcome these challenges on your way to
implementing effective High Availability and DR strategies
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15. 7. About Akelios
Akelios is a team of Cloud Computing experts that provides a wide
range of Cloud Computing services, including Cloud training, Cloud
development, Cloud migration, and Cloud support. We assist companies
across the various stages of the Cloud adoption cycle, providing:
Cloud Vendor, Platform, and Product Selection
Cloud Application Migration
Cost-Benefit Analysis
Cloud Disaster Recovery
Security Planning
Cloud Performance Tuning
Cloud Architecture Design
To learn how Akelios can help your company benefit from the cutting-
edge technologies and cost savings the Cloud provides, please visit
http://akelios.com.
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16. Thank You!
More Questions?
Send me an e-mail: info@akelios.com
Visit my blog: blog.akelios.com
Follow us on Twitter: twitter.com/theakelios
Author: Matthew Brown, VP of Marketing
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