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Most Powerful High Availability / Load Balancing #yapcasia 2012

riywo
September 30, 2012
Programming
3
3.4k

Most Powerful High Availability / Load Balancing #yapcasia 2012

riywo

September 30, 2012
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Transcript

  1. Most Powerful
    High Availability
    Load Balancing
    Sep, 29, 2012
    YAPC::Asia 2012 @riywo

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  2. @riywo

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  3. http://www.publicdomainpictures.net/view-image.php?image=4314&picture=t-shirt-image

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  4. View Slide

  5. View Slide

  6. Talk about....
    * Why is this good?
    * Why is this bad?

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  7. HALB

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  8. What?

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  9. LB
    Server
    Server
    Server
    Server

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  10. HA
    Server
    Server
    Server
    Server
    ✗
    Health
    Check

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  11. Same!

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  12. Where?

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  13. HA
    LB
    Web
    Web
    Web
    Web
    User

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  14. HA
    LB
    DB
    DB
    DB
    DB
    Web

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  15. HA
    LB
    API
    API
    API
    API
    Web

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  16. Anywhere!

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  17. How?

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  18. BIG-IP
    ServerIron

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  19. LVS

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  20. HAProxy

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  21. mod_proxy

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  22. nginx

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  23. ELB

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  24. MyDNS

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  25. Pros/Cons

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  26. Pros Cons
    H/W
    Inline
    (DSR)
    Powerful Difficult
    Expensive
    Proxy
    Inline
    (DSR) Easy to use Performance
    DNS No
    proxy Performance Difficult

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  27. Pros Cons
    H/W
    Inline
    (DSR)
    Powerful Difficult
    Expensive
    Proxy
    Inline
    (DSR) Easy to use Performance
    DNS No
    proxy Performance Difficult

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  28. DNS

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  29. No Proxy

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  30. DNS DB
    DB
    DB
    DB
    Web
    1
    2
    Weighted-DNS
    RoundRobin
    HA
    LB

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  31. Cache

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  32. DNS DB
    DB
    DB
    DB
    Web
    2
    Cache
    1
    3

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  33. Cache is
    Difficult

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  34. DNS DB
    DB
    DB
    DB
    Web
    Cache
    ✗
    Health
    Check

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  35. DNS DB
    DB
    DB
    DB
    Web
    Cache
    ✗
    Health
    Check
    Inconsistent

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  36. Solution

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  37. Client
    DNS

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  38. DNS
    DB
    DB
    DB
    DB
    Web
    ✗
    Health
    Check

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  39. Too many
    Health Check

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  40. DB
    DB
    DB
    DB
    DNS
    Web
    ✗
    Health
    Check
    DNS
    Web
    DNS
    Web
    Health
    CheckHealth
    Check

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  41. Solution

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  42. Eventual
    Consistent

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  43. DB
    DB
    DB
    DB
    DNS
    Web
    ✗
    DNS
    Web
    DNS
    Web
    Health
    Check
    DNS
    2 Async
    1

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  44. How?

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  45. DB
    DB
    DB
    DB
    ✗
    MyDNS
    Web
    Health
    Check
    MyDNS
    1
    2 Replication
    MyDNS
    Web MyDNS
    Web

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  46. Good Points

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  47. * Clients know all info
    * Eventual Consistent
    * Any Application:)

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  48. Bad Points

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  49. * Too much...
    * Async difficult

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  50. Join us!
    * Perl Mongers
    * Operation Engineers

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  51. Join us!
    * Perl Mongers
    * Operation Engineers
    * Baseball Players :)

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  52. Thanks!

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  53. @riywo
    blog.riywo.com
    weblog.riywo.com

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