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Apply Cache For Beginner #1

      charsyam@naver.com
Key Value
   and




  KEY        Value
  User_ID   Profile
            - LastLoginTime
            - UserName
            - ETC
Key Value
   and




   1. Check Cache Server -> Read Cache



         2. Read DB -> Write Cache
Key Value – Easy to Read
    and




   1. Check Cache Server -> Read Cache



          2. Read DB -> Write Cache
Key Value – Hard to Update
    and




           1. Update To DB



          2. Update to Cache
What is Hard?
Key Value – SYNC Easy
            and




  Fail!!!            1. Update To DB



                  2. Fail To Transaction
Key Value – SYNC HARD
            and




                   1. Update To DB



  Fail!!!         2. Update to Cache
Key Value – How
           and




                     1. Update To DB



 Fail!!!            2. Update to Cache


                 RETRY                 BATCH
Data!
The most important thing
If data is not important
        Cache Updating is not important

              Login Count
            Last Login Time
                 ETC
BUT!
If data is important
        Cache Updating is important

             Server Address
               Data Path
                  ETC
HOW!
RETRY!
Retry, Retry, Retry
Solve Over 9x%.
Batch!
Queuing Service
Error Log
  Queue       Batch
Error Log   Processor
Error Log
Error Log               Cache
Error Log               Server
Error Log
  Queue       Batch
Error Log   Processor
Error Log   Error Log
Error Log               Cache
                        Server
Error Log
  Queue       Batch        UPDATE
Error Log   Processor
Error Log
Error Log                Cache
                         Server
                        Error Log
GEARMAN
BEANSTALKD
Thank you!

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Apply cache for beginner#1