Upgrade to Pro — share decks privately, control downloads, hide ads and more …

RICON West 2012: Bringing Consistency to Riak (...

Avatar for Joseph Blomstedt Joseph Blomstedt
October 30, 2013
Programming
810
3

RICON West 2012: Bringing Consistency to Riak (Part 2)

Avatar for Joseph Blomstedt

Joseph Blomstedt

October 30, 2013

More Decks by Joseph Blomstedt

See All by Joseph Blomstedt
Data Structure Adventures for Fun, Profit, and Performance
Avatar for Joseph Blomstedt jtuple
2
390
Riak -- Seattle Scalability
Avatar for Joseph Blomstedt jtuple
2
490
Hansei: Property-based Development of Concurrent Systems
Avatar for Joseph Blomstedt jtuple
3
2.3k
Riak 1.2 Webinar Preview
Avatar for Joseph Blomstedt jtuple
1
290
Test First Construction of Distributed Systems
Avatar for Joseph Blomstedt jtuple
3
1.1k

Other Decks in Programming

See All in Programming
共通化で考えるべきは、実装より公開する型だった
Avatar for code-egg codeegg
0
210
【やさしく解説 設計編 #0】DDDのコード、読めるのに分からない人へ
Avatar for HideyukiKitao panda728
PRO
2
250
そのテスト、説明できますか？~LWテスト戦略FW~のご紹介
Avatar for Kei Nakahara nakahara
0
200
【やさしく解説 設計編・中級 #1】一つの車に、運転手は一人　～ある倉庫システムの事例から～
Avatar for HideyukiKitao panda728
PRO
0
160
スマートグラスで並列バイブコーディング
Avatar for Hayami Shuhei hyshu
0
290
エンジニア向け会社紹介/Findy Company Profile
Avatar for Findy findyinc
6
360k
Claude Team Plan導入・ガイド
Avatar for tk3fftk tk3fftk
0
160
ローカルLLMでどこまでコードが書けるか -拡張版 /　How much code can be written on a local LLM Extended
Avatar for Naoki Kishida kishida
12
4.7k
20260623_Loop Engineeringで自分の分身の問い合わせBotを作る
Avatar for ryugen04 ryugen04
0
200
Embedded SREと共に達成した会員管理システムのAWS移行 - SRE NEXT 2026 ランチスポンサーセッション
Avatar for ニフティ株式会社 niftycorp
PRO
1
2.3k
Claude Opus 4.6以後の受託開発エンジニアの変化(Claude Code開発ノウハウ大公開スペシャルbyクラスメソッド)
Avatar for t-iida iidatakuma
1
560
霧の中の代数的エフェクト
Avatar for funnycat funnyycat
1
340

Featured

See All Featured
How to Ace a Technical Interview
Avatar for Jacob Kaplan-Moss jacobian
281
24k
KATA
Avatar for Megan Lloyd mclloyd
PRO
35
15k
SEO for Brand Visibility & Recognition
Avatar for Aleyda Solis aleyda
0
4.6k
The MySQL Ecosystem @ GitHub 2015
Avatar for Sam Lambert samlambert
251
13k
Designing Dashboards & Data Visualisations in Web Apps
Avatar for Des Traynor destraynor
231
55k
JAMstack: Web Apps at Ludicrous Speed - All Things Open 2022
Avatar for David Neal reverentgeek
1
490
The SEO identity crisis: Don't let AI make you average
Avatar for Varn varn
0
510
Are puppies a ranking factor?
Avatar for Jono Alderson jonoalderson
1
3.7k
Leadership Guide Workshop - DevTernity 2021
Avatar for David Neal reverentgeek
1
320
The Cost Of JavaScript in 2023
Avatar for Addy Osmani addyosmani
55
10k
We Have a Design System, Now What?
Avatar for Morgane Peng morganepeng
55
8.2k
How to Align SEO within the Product Triangle To Get 
Buy-In & Support - #RIMC
Avatar for Aleyda Solis aleyda
2
1.6k

Transcript

  1. Joseph Blomstedt (@jtuple) Basho Technologies Bringing Consistency To Riak (Part

    2) Tuesday, October 29, 13

  2. CAP Theorem 2 Tuesday, October 29, 13

  3. 3 Partition-tolerance Consistency Availability Tuesday, October 29, 13

  4. 4 Partition-tolerance Consistency Availability Tuesday, October 29, 13

  5. 5 Partition-tolerance Consistency Availability CP AP Tuesday, October 29, 13

  6. 6 Partition-tolerance Consistency Availability CP AP Tuesday, October 29, 13

  7. 7 Partition-tolerance Consistency Availability CP AP Tuesday, October 29, 13

  8. 8 C/P Strict Quorum A/P Sloppy Quorum A/P Tuesday, October

    29, 13

  9. 9 C/P Strict Quorum A/P Sloppy Quorum A/P Tuesday, October

    29, 13

  10. 10 Node 1 Node 2 Node 3 Node 4 Node

    5 client client client Tuesday, October 29, 13

  11. 11 Node 1 Node 2 Node 3 Node 4 Node

    5 client client client Tuesday, October 29, 13

  12. 12 Node 1 Node 2 Node 3 Node 4 Node

    5 client client client Tuesday, October 29, 13

  13. 13 Node 1 Node 2 Node 3 Node 4 Node

    5 client client client Tuesday, October 29, 13

  14. 14 C/P Strict Quorum A/P Sloppy Quorum A/P Tuesday, October

    29, 13

  15. 15 Node 1 Node 2 Node 3 Node 4 Node

    5 client client client Tuesday, October 29, 13

  16. 16 Node 1 Node 2 Node 3 Node 4 Node

    5 client client client Tuesday, October 29, 13

  17. 17 Node 1 Node 2 Node 3 Node 4 Node

    5 client client client Tuesday, October 29, 13

  18. 18 Node 1 Node 2 Node 3 Node 4 Node

    5 client client client Tuesday, October 29, 13

  19. 19 C/P Strict Quorum A/P Sloppy Quorum A/P Tuesday, October

    29, 13

  20. 20 Node 1 Node 2 Node 3 Node 4 Node

    5 client client client Tuesday, October 29, 13

  21. 21 Node 1 Node 2 Node 3 Node 4 Node

    5 client client client Tuesday, October 29, 13

  22. 22 Node 1 Node 2 Node 3 Node 4 Node

    5 client client client Tuesday, October 29, 13

  23. 23 Node 1 Node 2 Node 3 Node 4 Node

    5 client client client Tuesday, October 29, 13

  24. 24 Node 1 Node 2 Node 3 Node 4 Node

    5 client client client client client Tuesday, October 29, 13

  25. Eventual Consistency 25 Tuesday, October 29, 13

  26. 26 A A A Tuesday, October 29, 13

  27. 27 A A A Tuesday, October 29, 13

  28. 28 A A A B Tuesday, October 29, 13

  29. 29 A A A B Tuesday, October 29, 13

  30. 30 A A A B B B B Tuesday, October

    29, 13

  31. 31 A A A Tuesday, October 29, 13

  32. 32 A A A B C Tuesday, October 29, 13

  33. 33 A A A B C Tuesday, October 29, 13

  34. 34 A A A B {B,C} {B,C} {B,C} C Tuesday,

    October 29, 13

  35. 35 Write Once Immutable Last Write Wins Business Rules CRDTs/Monotonicity

    Tuesday, October 29, 13

  36. 36 Write Once Immutable Last Write Wins Business Rules CRDTs/Monotonicity

    Tuesday, October 29, 13

  37. 37 Write Once Immutable Last Write Wins Business Rules CRDTs/Monotonicity

    Tuesday, October 29, 13

  38. 38 Write Once Immutable Last Write Wins Business Rules CRDTs/Monotonicity

    Tuesday, October 29, 13

  39. 39 Write Once Immutable Last Write Wins Business Rules CRDTs/Monotonicity

    Tuesday, October 29, 13

  40. 40 Write Once Immutable Last Write Wins Business Rules CRDTs/Monotonicity

    Tuesday, October 29, 13

  41. Strong Consistency 41 Tuesday, October 29, 13

  42. Strong Consistency 42 Why? Tuesday, October 29, 13

  43. Strong Consistency 43 Recency Tuesday, October 29, 13

  44. Strong Consistency 44 Recency Partial Writes Tuesday, October 29, 13

  45. Strong Consistency 45 Recency Partial Writes Atomicity Tuesday, October 29,

    13

  46. 46 Recency Partial Writes Atomicity Tuesday, October 29, 13

  47. 47 Recency Partial Writes Atomicity Tuesday, October 29, 13

  48. 48 Eventual consistency is great Tuesday, October 29, 13

  49. 49 But, when is eventual? Tuesday, October 29, 13

  50. 50 Do I have the most recent value? Tuesday, October

    29, 13

  51. 51 CRDTs don’t help Tuesday, October 29, 13

  52. 52 (a,1) (a,1) (a,1) =1 Tuesday, October 29, 13

  53. 53 (a,1) (a,1) (a,1) Tuesday, October 29, 13

  54. 54 (a,1) +1 +3 (a,1) (a,1) (a,2) (a,1),(b,3) =2 =4

    Tuesday, October 29, 13

  55. 55 (a,1) +1 +3 (a,1) (a,1) (a,2) (a,1),(b,3) Tuesday, October

    29, 13

  56. 56 (a,1) +1 +3 (a,1) (a,1) (a,2) (a,1),(b,3) (a,2),(b,3) (a,2),(b,3)

    (a,2),(b,3) Tuesday, October 29, 13

  57. 57 (a,1) +1 +3 (a,1) (a,1) (a,2) (a,1),(b,3) (a,2),(b,3) (a,2),(b,3)

    (a,2),(b,3) =5 Tuesday, October 29, 13

  58. 58 (a,1) +1 +3 (a,1) (a,1) (a,2) (a,1),(b,3) =2 =4

    Tuesday, October 29, 13

  59. 59 Recency Partial Writes Atomicity Tuesday, October 29, 13

  60. 60 A write B (fail) A A B A A

    Tuesday, October 29, 13

  61. 61 B A A Tuesday, October 29, 13

  62. 62 B A A read A read A read A

    Tuesday, October 29, 13

  63. 63 B A A read A read A read A

    Tuesday, October 29, 13

  64. 64 B A A read A read A read A

    read B Tuesday, October 29, 13

  65. 65 Recency Partial Writes Atomicity Tuesday, October 29, 13

  66. Strong Consistency 66 Tuesday, October 29, 13

  67. Strong Consistency 67 What does mean for Riak 2.0? Tuesday,

    October 29, 13

  68. 68 Conditional single key atomic operations Tuesday, October 29, 13

  69. 69 No siblings Tuesday, October 29, 13

  70. 70 get sees most recent put Tuesday, October 29, 13

  71. 71 get/modify/put fails if object changed Tuesday, October 29, 13

  72. 72 get/modify/put fails if object changed (eg. concurrent put) Tuesday,

    October 29, 13

  73. 73 puts w/o vclock fails if object exists Tuesday, October

    29, 13

  74. 74 partial writes resolved on read Tuesday, October 29, 13

  75. 75 Consensus Tuesday, October 29, 13

  76. 76 Paxos Tuesday, October 29, 13

  77. 77   1RGH    1RGH  

     1RGH    1  SUHSDUH 1   SURPLVH 1 9 %  SURPLVH 1 9 &  9 1 I 9 $  9 %  9 &  FRPPLW 1 9 1    DFFHSW 1  Tuesday, October 29, 13

  78. 78 Rinse/repeat for each request Tuesday, October 29, 13

  79. 79 2 round trips/request Tuesday, October 29, 13

  80. 80 Multi-Paxos Tuesday, October 29, 13

  81. 81 First Request Tuesday, October 29, 13

  82. 82   1RGH    1RGH  

     1RGH    1 ,   SUHSDUH 1 ,   SURPLVH 1 , 9 %  SURPLVH 1 , 9 &  9 1 I 9 $  9 %  9 &  FRPPLW 1 , 9 1    DFFHSW 1 ,  Tuesday, October 29, 13

  83. 83 Each Additional Request Tuesday, October 29, 13

  84. 84   1RGH    1RGH  

     1RGH    ,  FRPPLW 1 , 9    DFFHSW 1 ,  Tuesday, October 29, 13

  85. 85 1 round trip/request (common case) Tuesday, October 29, 13

  86. 86 Problem Shipping entire state each request is expensive Tuesday,

    October 29, 13

  87. 87 Solution Paxos + Replicated Log Tuesday, October 29, 13

  88. 88 Problem Now I have N problems Tuesday, October 29,

    13

  89. 89 Log recovery Log trimming Rollup Snapshots Fault Recovery Tuesday,

    October 29, 13

  90. 90 Choose your own adventure... Tuesday, October 29, 13

  91. 91 Better Solution Build log replication into protocol Tuesday, October

    29, 13

  92. 92 Better Solution ZK Atomic Broadcast Raft Tuesday, October 29,

    13

  93. Zab 93 Tuesday, October 29, 13

  94. 94 Tuesday, October 29, 13

  95. 95 Tuesday, October 29, 13

  96. 96 Tuesday, October 29, 13

  97. 97 Tuesday, October 29, 13

  98. Raft 98 Tuesday, October 29, 13

  99. 99 Tuesday, October 29, 13

  100. 100 raftconsensus.github.io Tuesday, October 29, 13

  101. 101 Text Tuesday, October 29, 13

  102. Back to Riak 102 Tuesday, October 29, 13

  103. 103 Key/Value Keys are independent Active Anti-Entropy Tunable backends Tuesday,

    October 29, 13

  104. 104 Each key is independent state Tuesday, October 29, 13

  105. 105 Simple multi-paxos per key Tuesday, October 29, 13

  106. 106 1B keys = 1B consensus groups? Tuesday, October 29,

    13

  107. 107 No Tuesday, October 29, 13

  108. 108 Consensus group per preflist (replica set) Tuesday, October 29,

    13

  109. 109 Emulate paxos per key Tuesday, October 29, 13

  110. Node 0 Node 1 Node 2 Tuesday, October 29, 13

  111. 111 1 2 3 4 5 6 7 123 Tuesday,

    October 29, 13

  112. 112 1 2 3 4 5 6 7 123 234

    Tuesday, October 29, 13

  113. 113 1 2 3 4 5 6 7 123 234

    345 Tuesday, October 29, 13

  114. 114 1 2 3 4 5 6 7 123 234

    345 456 Tuesday, October 29, 13

  115. 115 1 2 3 4 5 6 7 123 234

    345 456 567 ... Tuesday, October 29, 13

  116. 116 1 2 3 4 5 6 7 123 234

    345 456 567 Ensembles ... Tuesday, October 29, 13

  117. 117 64 partition ring = 64 ensembles Tuesday, October 29,

    13

  118. 118 Each Ensemble Elects leader Establishes epoch Supports get/put ops

    Tuesday, October 29, 13

  119. 119 Establish a new epoch Tuesday, October 29, 13

  120. 120   1RGH    1RGH  

     1RGH    1 ,   SUHSDUH 1 ,   SURPLVH 1 , 9 %  SURPLVH 1 , 9 &  9 1 I 9 $  9 %  9 &  FRPPLW 1 , 9 1    DFFHSW 1 ,  Tuesday, October 29, 13

  121. 121 consensus state epoch sequence membership leader Tuesday, October 29,

    13

  122. 122 K/V objects epoch sequence key value Tuesday, October 29,

    13

  123. 123 GET leader reads local object if obj.epoch old: refresh

    reply w/ val Tuesday, October 29, 13

  124. 124   1RGH    1RGH  

     1RGH    REMHSRFK  HSRFK  JHW .H\   UHSO\ (SRFK %  6HT %  9DO %  UHSO\ (SRFK &  6HT &  9DO &  9DO ODWHVW 9DO $  9DO %  9DO & 9DOHSRFK HSRFK  ZULWH (SRFK 6HT 9DO    DFN (SRFK 6HT  Tuesday, October 29, 13

  125. 125   1RGH    1RGH  

     1RGH    REMHSRFK HSRFK  5HSO\ ORFDOBJHW .H\  Tuesday, October 29, 13

  126. 126 2 roundtrips/get (worst) 0 roundtrip/get (best) Tuesday, October 29,

    13

  127. 127 PUT leader reads local object if obj.epoch old: refresh

    if modify(obj) false: fail commit modified obj reply ok Tuesday, October 29, 13

  128. 128   1RGH    1RGH  

     1RGH    REMHSRFK  HSRFK  JHW .H\   UHSO\ (SRFK %  6HT %  9DO %  UHSO\ (SRFK &  6HT &  9DO &  /DWHVW ODWHVW 9DO $  9DO %  9DO & 9DO PRGLI\ /DWHVW  ZULWH (SRFK 6HT 9DO    DFN (SRFK 6HT  Tuesday, October 29, 13

  129. 129   1RGH    1RGH  

     1RGH    REMHSRFK HSRFK  /DWHVW ORFDOBJHW .H\ 9DO PRGLI\ /DWHVW  ZULWH (SRFK 6HT 9DO    DFN (SRFK 6HT  Tuesday, October 29, 13

  130. 130 2 roundtrips/put (worst) 1 roundtrip/put (best) Tuesday, October 29,

    13

  131. 131 Leader abandons leadership if any quorum operation ever fails

    Tuesday, October 29, 13

  132. 132 Which forces new epoch to be established Tuesday, October

    29, 13

  133. 133 Partial Writes Tuesday, October 29, 13

  134. failed partial write X (2) X (2) X (2) X

    (2) X (2) Y (2) epoch 2 epoch 3 Tuesday, October 29, 13

  135. read / rewrite / reply X X (2) X (2)

    Y (2) X (3) X (3) Y (2) epoch 3 epoch 3 Tuesday, October 29, 13

  136. X (3) X (3) Y (2) X (3) X (3)

    X (3) read / repair / reply X epoch 3 epoch 3 Tuesday, October 29, 13

  137. Usage 137 Tuesday, October 29, 13

  138. 138 AP or CP per bucket type Tuesday, October 29,

    13

  139. 139 consistent = true Tuesday, October 29, 13

  140. 140 $ riak-admin bucket-type create strong \ '{"props": {"consistent": true}}'

    strong created Tuesday, October 29, 13

  141. 141 $ riak-admin bucket-type activate strong strong has been activated

    Tuesday, October 29, 13

  142. 142 > riakc_pb_socket:get(Socket, {<<"strong">>, <<"bucket">>}, <<"key">>). {error,notfound} Tuesday, October 29,

    13

  143. 143 > Obj = riakc_obj:new({<<"strong">>, <<"bucket">>}, <<"key">>, <<"1">>)). > riakc_pb_socket:put(Socket,

    Obj). ok Tuesday, October 29, 13

  144. 144 > Obj2 = riakc_obj:new({<<"strong">>, <<"bucket">>}, <<"key">>, <<"2">>)). > riakc_pb_socket:put(Socket,

    Obj2). {error, failed} Tuesday, October 29, 13

  145. 145 {ok, Obj3} = riakc_pb_socket:get(Socket, {<<"strong">>, <<"bucket">>}, <<"key">>). Tuesday, October

    29, 13

  146. 146 Obj4 = riakc_obj:update_value(Obj3, <<"2">>). Tuesday, October 29, 13

  147. 147 Obj5 = riakc_obj:update_value(Obj3, <<"22">>). Tuesday, October 29, 13

  148. 148 > riakc_pb_socket:put(Socket, Obj4). ok Tuesday, October 29, 13

  149. 149 > riakc_pb_socket:put(Socket, Obj5). {error,<<"failed">>} Tuesday, October 29, 13

  150. 150 Your client may vary Tuesday, October 29, 13

  151. 151 Your client may vary We’re working on it Tuesday,

    October 29, 13

  152. Tech Preview 152 Tuesday, October 29, 13

  153. 153 No AAE syncing No 2i No stats Tuesday, October

    29, 13

  154. 154 Will be in 2.0 final Tuesday, October 29, 13

  155. Coming Soon 155 Tuesday, October 29, 13

  156. 156 Datatypes Multi-DC Lightweight Tx? Perf benchmarks Tuesday, October 29,

    13

  157. 157 Datatypes Multi-DC Lightweight Tx? Perf benchmarks Tuesday, October 29,

    13

  158. 158 Datatypes Multi-DC Lightweight Tx? Perf benchmarks Tuesday, October 29,

    13

  159. 159 Datatypes Multi-DC Lightweight Tx? Perf benchmarks Tuesday, October 29,

    13

  160. 160 Datatypes Multi-DC Lightweight Tx? Perf benchmarks Tuesday, October 29,

    13

  161. Questions? 161 Tuesday, October 29, 13