Redisでバッチ処理を冗長化しつつ排他制御

Transcript

1. 3FEJTͰόονॲཧΛ
   ৑௕Խͭͭ͠ഉଞ੍ޚ
   

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2. ࣗݾ঺հ
   

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3. ͜͏͍͏ύλʔϯ
   ͓Εͷ3BJMT"QQ ֎෦ͷ"1*
   6TFS
   

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4. ຖճ"1*ϦΫΤετ͢Δͱ
   w Ԡ౴଎౓తʹͭΒ͍
   w "1*αʔόʹෛՙ͕͔͔Δ
   

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5. ͜͏͍͏෩ʹ͢Δ
   ͓Εͷ3BJMT"QQ ֎෦ͷ"1*
   6TFS
   ϢʔβʔϦΫΤετ όονॲཧ
   

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6. 3BJMTͳΒ
   w XIFOFWFSDBQJTUSBOPͰBQQαʔόʹσϓϩ
   ΠͷλΠϛϯάͰDSPO࡞੒Ͱ͖ͯ௒ḿΔ
   

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7. 㵺㱿㵺
   ɻP ଴ͯΑʁ"QQαʔόͬͯ৑௕Խ͞ΕͯΔΑͳʁ
   
   

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8. c"QQ "QQcᵎ ☋ʆ
   ᵊࡾ
   

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9. ◠㷩◠
   ☛Ͳͬͪʹ΋ొ࿥͓͍ͯͨ͠Αʔ
   # Begin Whenever generated tasks for: oreno_app
   PATH=/var/www/oreno_app/shared/bundle/ruby/2.1.0/bin:/usr/local/rbenv/
   versions/2.1.2/bin:/usr/local/rbenv/libexec:/usr/local/sbin:/usr/local/
   bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games
   !
   0,5,10,15,20,25,30,35,40,45,50,55 * * * * /bin/bash -l -c 'cd /var/www/
   oreno_app/releases/20140917060508 && RAILS_ENV=production bundle exec rake
   kankore:ensei --silent >> log/crontab.log 2>&1'
   !
   # End Whenever generated tasks for: oreno_app
   

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10. ‧‪‬‭▓▒░ `Т`
    ░▒▓‭‬‪‧͏Θ͋͋͋͋͋͋
    

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11. ՕॴͰ૸Δͱ
    w ࢿݯͷແବݣ͍ײ
    w Կ͔ΛΠϯΫϦϝϯτ͢ΔͳͲɺͭ૸ͬͨΒக
    ໋తͳॲཧͩͱࢮ͵
    

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12. ͜ΕͰղܾʂʁ
    ͓Εͷ3BJMT"QQ ͓Εͷ3BJMT"QQ
    όον࣮ߦαʔό
    

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13. ͍͕ͭ͜མͪͨΒࢮ͵
    όον࣮ߦαʔό
    ʀŋAТŋ
    
    

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14. ͦ͜Ͱ3FEJT
    task nanika: :environment do
    sleep(rand(5)) # 実行時間をずらす
    redis = Redis.new
    unless redis.get(‘task_executed')
    redis.setex('task_executed', 300, Time.now)
    # やりたいタスクを書く
    end
    end
    

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15. ͜͏͢Δ͜ͱͰ
    w ઌʹಈ͍ͨํ͸3FEJTʹΩʔ͕ͳ͚Ε͹ΩʔΛ
    ࡞ͬͯλεΫ࣮ߦ
    w Ωʔ͕͋ͬͨΒଈ࠲ʹ΍ΊΔ
    w Ωʔ͸Ұఆ࣌ؒͰʢ࣍ͷDSPO࣮ߦ·Ͱʹʣফ͑
    Δ
    w ͭ·Γɺ৑௕Խͭͭ͠ഉଞ੍ޚͰ͖Δ
    

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16. ͱ͍͏͜ͱΛ΍ͬͯ͘ΕΔ(FN
    ͕͋Γ·ͨ͠
    w IUUQTHJUIVCDPNLFOOSFEJTNVUFY
    

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17. ͜͏͍͏ײ͡Ͱॻ͚·͢
    Redis::Classy.db = Redis.new()
    mutex = Redis::Mutex.new('lock_access', expire: 180)
    begin
    mutex.lock!
    # やりたい処理を書く
    rescue Redis::Mutex::LockError
    puts 'locked'
    end
    

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18. ͓͠·͍
    

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