Disaster Recovery 101
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  • 1. Disaster Recovery 101
    Brent Ozar, Quest Software
  • 2. Brent Ozar
    SQL Server Expert for Quest Software
    Former SQL DBA for $7b company inHurricane Alley
    Managed >80tb SAN, VMware
  • 3. Today’s Agenda
    HA vs DR
    HA Options
    DR Options
    Backup Best Practices
    Learned the Hard Way
    Resources
  • 4. Common Backup Schedules
    Daily fulls
    Daily fulls, frequent t-logs
    Weekly fulls, daily diffs, frequent t-logs
    “What backups?”
  • 5. High Availability is for:
    Disaster Recovery is for:
    Photo licensed with Creative Commons, used from:http://www.flickr.com/photos/melancon/280076809/
    Photo licensed with Creative Commons, used from:http://www.flickr.com/photos/meltedplastic/2854777253/
  • 6. High Availability:
    Disaster Recovery:
    • Replication
    • 7. Asynchronous Mirroring
    • 8. Log Shipping
    • 9. SAN Replication
    • 10. Virtualization Replication
    • 11. Clustering
    • 12. Synchronous Mirroring
    • 13. Replication
    Photo licensed with Creative Commons, used from:http://www.flickr.com/photos/melancon/280076809/
    Photo licensed with Creative Commons, used from:http://www.flickr.com/photos/meltedplastic/2854777253/
  • 14. HA: Clustering
  • 15. HA: Synchronous Mirroring
  • 16. Both HA, DR: Replication
  • 17. DR: Asynchronous Mirroring
  • 18. DR: Log Shipping
  • 19. DR: SAN Replication
  • 20. DR: Virtualization Replication
  • 21. Brent’s Personal Favorites
    High Availability:
    Disaster Recovery:
    Photo licensed with Creative Commons, used from:http://www.flickr.com/photos/melancon/280076809/
    Photo licensed with Creative Commons, used from:http://www.flickr.com/photos/meltedplastic/2854777253/
  • 29. Backup Best Practices
    Never back up directly to local disk
    Back up to file share
    Back up to different SAN
    Back flat files up to tape
    Get the tapes offsite fast
    If it’s really critical, mirror the backups
    Photo licensed with Creative Commons, used from:http://www.flickr.com/photos/darwinbell/465459020/
  • 30. Avoid Agents
    Lose schedule control
    Can’t gauge success
    Photo licensed with Creative Commons, used from:http://www.flickr.com/photos/practicalowl/314989744/
  • 31. Do Fire Drills Ahead Of Time
    Build a standalone restore testbed
    Document how long a restore will take for managers
    Update it quarterly
    Trust no one
    Photo licensed with Creative Commons, used from:http://www.flickr.com/photos/millzero/705902956/
  • 32. Tale of Two Bookmark Services
  • 33. http://delicious.com/brento
  • 34. Worst Case Scenario
  • 35. Lessons Learned
    Test your backups
    Retain your backups
    Know business value of backups
  • 36. Log Shipping Lesson Learned
    Production
    SQL Server
    High Availability
    SQL Server
    Log Shipping
    SAN #1
    SAN #2
    Production SQL Arrays
    HASQL Arrays
  • 37. Surprise!
    Production
    SQL Server
    High Availability
    SQL Server
    File Server
    Log Shipping
    Log Shipping
    SAN #1
    SAN #2
    Production SQL Arrays
    HASQL Arrays
    File Server Arrays
  • 38. Brent’s Role Swap of Doom
    Disaster Recovery
    Datacenter
    Production
    Datacenter
    100MB connection
    Data synced to DR
  • 39. Brent’s Role Swap of Doom
    Disaster Recovery
    Datacenter
    Production
    Datacenter
    100MB connection
    Data synced back to production
  • 40. Brent’s Role Swap of Doom
    Disaster Recovery
    Datacenter
    Production
    Datacenter
    100MB connection
    Data synced back to production
    PLUS
    Users running applications that query the database in DR
    1gb Ethernet
  • 41. Brent’s Role Swap of Doom
    Disaster Recovery
    Datacenter
    Production
    Datacenter
    100MB connection
    Tape Jukeboxes w/10 Drives
    Tape Jukeboxes w/6 Drives
  • 42. Building a Bug-Out Bag
    Photo Licensed with Creative Commons from http://www.flickr.com/photos/78256324@N00/394214262/
  • 43. Photo Licensed with Creative Commons from http://www.flickr.com/photos/moflytier/45842386/
  • 44. Personal Contents
    Power inverter
    Gadget chargers
    Clothes & toiletries
    Water & food
    Insurance papers
    Road atlas
    Flashlight
    Pillow
  • 45. Work Contents
    Software installs
    License keys
    Cell data cardor Verizon MiFi
    Contact list(updated annually)
  • 46. Contact Lists
    Family
    Coworkers
    Managers
    Alternate Offices
    HW Vendors
    SW Vendors
    ISP/Colo
    Photo Licensed with Creative Commons from http://www.flickr.com/photos/toastforbrekkie/1237898664/
  • 47. Lessons Learned
    Trust, but verify
    Test, test, test
    Whiteboard your environment
    Look for single points of failure
    Get a bug-out bag
  • 48. Resources
    • Visit our SQL Server technical resource blog at: www.sqlserverpedia.com - feel free to send your SQL Server related technical questions to:ask@sqlserverpedia.com
    • 49. Visit our dedicated SQL Server community site at: http://sqlserver.quest.com
    • 50. Check out our “Backstage” area with all of our collateral and upcoming events including our ‘Pain of the Week’ webcasts:
    • 51. www.quest.com/backstage
    • 52. www.quest.com/backstage/pow.aspx