Database and Public Endpoints redundancy on Azure
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The document discusses various techniques for implementing redundancy on Azure platforms like SQL Database, storage, endpoints, and virtual machines. It defines redundancy as duplicating critical components to increase reliability. Specific strategies covered include AlwaysOn for SQL, locally redundant and geo-redundant storage, load balancers and Traffic Manager for endpoints, and availability sets and failover clusters for virtual machines. The document emphasizes calculating required uptime, automating processes, and having disaster recovery plans to ensure redundancy meets reliability goals.
![TRAFFIC MANAGER
• [Not Supported] Hybrid Scenarios](https://image.slidesharecdn.com/kulendayz-raduvunvulea-140914025618-phpapp01/85/Database-and-Public-Endpoints-redundancy-on-Azure-38-320.jpg)
Database and Public Endpoints redundancy on Azure
- 1. DATABASE AND PUBLIC ENDPOINTS REDUNDANCY ON AZURE Radu Vunvulea @RaduVunvulea http://vunvulearadu.blogspot.com
- 2. OUR SPONSORS MADE THIS POSSIBLE! THANK YOU!
- 4. RADU VUNVULEA MCTS MCP BANK HOME AUTOMATION MVP ENTERPRISE AUTOMOTIVE PHARMA LEAN AND AGILE E-COMMERCE WEB iQuest AZURE JAVASCRIPT VUNVULEARADU.BLOGSPOT.COM MOBILE DOTNET @RaduVunvulea WCF WPF ENTHUSIASTIC
- 5. CLOUD IS NOT MANAGED BY GOD
- 6. AGENDA • Define Redundancy • SQL Database • Storage • Endpoints (HTTP/S, WCF) • VM
- 8. In engineering, redundancy is the duplication of critical components or functions of a system with the intention of increasing reliability of the system, usually in the form of a backup or fail-safe. Source: Wikipedia REDUNDANCY
- 9. TYPE OF REDUNDANCY Hardware Dual Modular Redundancy Triple Modular Redundancy Information Error detection Correction Time Transient Fault Detection Software N-versions Programming
- 10. TYPE OF REDUNDANCY Hardware Dual Modular Redundancy Triple Modular Redundancy Information Error detection Correction Time Transient Fault Detection Software N-versions Programming
- 11. TYPE OF REDUNDANCY Hardware Dual Modular Redundancy Triple Modular Redundancy Information Error detection Correction Time Transient Fault Detection Software N-versions Programming
- 12. TYPE OF REDUNDANCY Hardware Dual Modular Redundancy Triple Modular Redundancy Information Error detection Correction Time Transient Fault Detection Software N-versions Programming
- 13. TYPE OF REDUNDANCY Hardware Dual Modular Redundancy Triple Modular Redundancy Information Error detection Correction Time Transient Fault Detection Software N-versions Programming
- 14. HOW WE CAN TEST IT?
- 15. CHAOS MONKEY Netflix: The Chaos Monkey’s job is to randomly kill instances and services within our architecture
- 16. CHAOS MONKEY
- 19. SQL REDUDANCY
- 21. DEMO LET’S SEE SOME CODE
- 22. SQL BACKUPS
- 23. DEMO LET’S SEE SOME CODE
- 24. ALWAYSON
- 26. DISASTER RECOVERY PLAN (DRP) Do you have a disaster recovery plan? How long it takes to restart the entire system? How complicated is your checklist? Can you parallelize it?
- 27. DISASTER RECOVERY PLAN (DRP) Do you have a disaster recovery plan? How long it takes to restart the entire system? How complicated is your checklist? Can you parallelize it? AUTOMATION
- 29. ENDPOINT • Any public endpoint • Accessible from internet or private networks
- 30. LOAD BALANCER
- 31. LOAD BALANCER • Free • Out of the box • Lever 3 Load Balancer type – TCP Level • No Sticky sessions • Partial Configurable
- 32. LOAD BALANCER PROBE • Custom app endpoint • Processor level, 500 Errors, Parallel task • Configurable from *.cscfg files <LoadBalancerProbes> <LoadBalancerProbe name="FooProbe" protocol="http" intervalInSeconds="30" path="/api/probe" port="80" timeoutInSeconds="60" /> </LoadBalancerProbes> • VM: Using Power Shell
- 33. REDUNDANCY
- 34. TRAFFIC MANAGER
- 35. TRAFFIC MANAGER
- 36. TRAFFIC MANAGER • ~Load Balancer (Word Wide level) • Redirect request based on client location • Any kind of endpoint – VM, Web/Worker Roles, DB and many more – External Endpoints • Methods: Failover, Round Robin, Performance • Is not FREE (1B DNS query = $0.75) • DNS TTL
- 37. DEMO LET’S SEE SOME CODE
- 38. TRAFFIC MANAGER • [Not Supported] Hybrid Scenarios
- 39. WHY REDUNDANCY IS SO IMPORTANT?
- 40. WINDOWS AZURE SLA’S • Compute 99.95% • SQL Database 99.90% • Storage 99.90% • Storage (RA-GRS) 99.99% • Active Directory 99.90% • Cache 99.90% • VM 99.95% • Service Bus 99.95%
- 41. WINDOWS AZURE SLA’S (PER MONTH) • Compute 99.95% 21.6m • SQL Database 99.90% 43.2m • Storage 99.90% 43.2m • Storage (RA-GRS) 99.99% <8m • Active Directory 99.90% 43.2m • Cache 99.90% 43.2m • VM 99.95% 21.6m • Service Bus 99.95% 21.6m
- 42. WINDOWS AZURE SLA’S • Compute 99.95% 21.6m • SQL Database 99.90% 43.2m • Storage 99.90% 43.2m • Storage (RA-GRS) 99.99% <8m • Active Directory 99.90% 43.2m • Cache 99.90% 43.2m • VM 99.95% 21.6m • Service Bus 99.95% 21.6m
- 43. WINDOWS AZURE SLA’S • Downtime per month: 216m 21.6*2+43.2*4=216m
- 44. WINDOWS AZURE SLA’S • Downtime per month: 216m 21.6*2+43.2*4=216m • Downtime per month: 0.5% (100/43200)*216=0.5%
- 45. WINDOWS AZURE SLA’S • Downtime per month: 216m 21.6*2+43.2*4=216m • Downtime per month: 0.5% (100/43200)*216=0.5% • Uptime: 99.5% 100-0.5=99.5%
- 46. WINDOWS AZURE SLA’S • Compute 99.95% 21.6m • SQL Database 99.90% 43.2m • Storage 99.90% 43.2m • Storage (RA-GRS) 99.99% <8m • Active Directory 99.90% 43.2m • Cache 99.90% 43.2m • VM 99.95% 21.6m • Service Bus 99.95% 21.6m
- 48. SERVICE BUS RELAY Relay
- 49. SERVICE BUS RELAY • Steps to integrate in existing application – Add assembly reference to SB Relay – Update WCF configuration sections (client and backend)
- 50. SERVICE BUS RELAY • Works only with – Async calls – Fire and Forget calls • Broker between endpoint and client • Store messages until backend is available • WCF Endpoint (Azure or on-premises) • Price model similar with SB (per messages)
- 52. LOCALLY REDUNDANT STORAGE • 3 copy of the content in the same data center 1 3 2
- 53. GEOGRAPHICALLY REDUNDANT STORAGE • 2 different data centers • Async replication 1 3 2 1 3 2
- 54. READ ACCESS GEO REDUNDANT STORAGE • Similar with GRS • Read only access to the secondary storage • Redirecting managed by developer • Async replication • 99.99% Uptime
- 55. DEMO LET’S SEE SOME CODE
- 56. TRAFFIC MANAGER
- 57. TRAFFIC MANAGER CHECK HEALTH STATUS OF OTHER SERVICES
- 60. DEMO LET’S SEE SOME CODE
- 61. MTBF, MTTR
- 62. MTBF -> MTTR Mean Time Between Failures Mean Time To Recovery
- 63. VM REDUNDANCY
- 64. VM • Same features offered by System Center on-premises • Availability Set • Windows Server Failover Cluster – Real time Sync
- 65. CONCLUSION
- 66. CONCLUSION • Everything has a price • Calculate up-time for specific roles and use-case • Don’t trust the 99.99% myth • Be as flexible as possible • Automate • Recovery plans
- 67. Q & A
- 68. OUR SPONSORS MADE THIS POSSIBLE! THANK YOU!