Upgrade to PRO for Only $50/Year—Limited-Time Offer! 🔥

Toronto MongoDB User Group

Avatar for Arthur Nogueira Neves Arthur Nogueira Neves
February 20, 2013
Technology
1
86

Toronto MongoDB User Group

Presetation given on Toronto MongoDB User group

Avatar for Arthur Nogueira Neves

Arthur Nogueira Neves

February 20, 2013
Tweet

More Decks by Arthur Nogueira Neves

See All by Arthur Nogueira Neves
Using multiple connections in ActiveRecord
Avatar for Arthur Nogueira Neves arthurnn
3
970
Rails talk - RubyLightningTalksTO
Avatar for Arthur Nogueira Neves arthurnn
0
96
Abril Pro Ruby
Avatar for Arthur Nogueira Neves arthurnn
0
350

Other Decks in Technology

See All in Technology
regrowth_tokyo_2025_securityagent
Avatar for h-ashisan hiashisan
0
260
初めてのDatabricks AI/BI Genie
Avatar for Takaaki Yayoi taka_aki
0
210
AIの長期記憶と短期記憶の違いについてAgentCoreを例に深掘ってみた
Avatar for やくも yakumo
4
460
【U/day Tokyo 2025】Cygames流 最新スマートフォンゲームの技術設計 〜『Shadowverse: Worlds Beyond』におけるアーキテクチャ再設計の挑戦～
Avatar for Cygames cygames
PRO
2
790
Haskell を武器にして挑む競技プログラミング ─ 操作的思考から意味モデル思考へ
Avatar for Naoya Ito naoya
7
1.6k
生成AIを利用するだけでなく、投資できる組織へ / Becoming an Organization That Invests in GenAI
Avatar for 株式会社カミナシ kaminashi
0
110
AWS re:Invent 2025で見たGrafana最新機能の紹介
Avatar for 濱田孝治 hamadakoji
0
430
Strands Agents × インタリーブ思考 で変わるAIエージェント設計 / Strands Agents x Interleaved Thinking AI Agents
Avatar for Takanori Suzuki takanorig
3
640
MySQLとPostgreSQLのコレーション / Collation of MySQL and PostgreSQL
Avatar for とみたまさひろ tmtms
1
1k
30分であなたをOmniのファンにしてみせます～分析画面のクリック操作をそのままコード化できるAI-ReadyなBIツール～
Avatar for Sagara sagara
0
180
エンジニアリングをやめたくないので問い続ける
Avatar for estie | エスティ estie
2
1.2k
Reinforcement Fine-tuning 基礎〜実践まで
Avatar for Morita ch6noota
0
190

Featured

See All Featured
Context Engineering - Making Every Token Count
Avatar for Addy Osmani addyosmani
9
540
The Impact of AI in SEO - AI Overviews June 2024 Edition
Avatar for Aleyda Solis aleyda
5
670
Design in an AI World
Avatar for tapps tapps
0
91
実際に使うSQLの書き方 徹底解説 / pgcon21j-tutorial
Avatar for soudai sone soudai
PRO
196
70k
Typedesign – Prime Four
Avatar for Hannes Fritz hannesfritz
42
2.9k
What the history of the web can teach us about the future of AI
Avatar for Ines Montani inesmontani
PRO
0
360
Efficient Content Optimization with Google Search Console & Apps Script
Avatar for Katarina Dahlin katarinadahlin
PRO
0
240
Fight the Zombie Pattern Library - RWD Summit 2016
Avatar for Marcelo Somers marcelosomers
234
17k
Lightning Talk: Beautiful Slides for Beginners
Avatar for Ines Montani inesmontani
PRO
1
390
State of Search Keynote: SEO is Dead Long Live SEO
Avatar for Ryan Jones ryanjones
0
60
Chrome DevTools: State of the Union 2024 - Debugging React & Beyond
Avatar for Addy Osmani addyosmani
9
1k
B2B Lead Gen: Tactics, Traps & Triumph
Avatar for Sophie Logan marketingsoph
0
29

Transcript

  1. MongoDB Toronto User group 1 Saturday, 23 February, 13

  2. Hi. 2 Saturday, 23 February, 13

  3. Hi. @arthurnn 2 Saturday, 23 February, 13

  4. Hi. @arthurnn 2 Saturday, 23 February, 13

  5. Hi. @arthurnn 2 Saturday, 23 February, 13

  6. 3 Saturday, 23 February, 13

  7. Tech 4 Saturday, 23 February, 13

  8. Tech 4 Saturday, 23 February, 13

  9. Tech 4 Saturday, 23 February, 13

  10. Tech 4 Saturday, 23 February, 13

  11. Tech 4 Saturday, 23 February, 13

  12. RPC Tech 4 Saturday, 23 February, 13

  13. Databases 5 Saturday, 23 February, 13

  14. Databases 5 Saturday, 23 February, 13

  15. Databases 5 Saturday, 23 February, 13

  16. Databases Memcached 5 Saturday, 23 February, 13

  17. Databases Memcached Sphinx -> ElasticSearch 5 Saturday, 23 February, 13

  18. + 6 Saturday, 23 February, 13

  19. + Activity Feed 6 Saturday, 23 February, 13

  20. + Activity Feed User Settings 6 Saturday, 23 February, 13

  21. + Activity Feed User Settings Push Notification 6 Saturday, 23

    February, 13

  22. + Activity Feed User Settings Push Notification Device track 6

    Saturday, 23 February, 13

  23. + Activity Feed User Settings Push Notification Device track Stats

    6 Saturday, 23 February, 13

  24. Servers 1.0 7 Saturday, 23 February, 13

  25. Servers 1.0 mongod primary 7 Saturday, 23 February, 13

  26. Servers 1.0 mongod primary mongod secondary 7 Saturday, 23 February,

    13

  27. Servers 1.0 mongod primary mongod secondary mongod secondary 7 Saturday,

    23 February, 13

  28. Servers 1.0 mongod primary mongod secondary mongod secondary mongod hidden

    7 Saturday, 23 February, 13

  29. Servers 2.0 mongod mongod mongod mongod mongod mongod Primary mongod

    mongoc mongod mongoc mongod mongoc Main 8 Saturday, 23 February, 13

  30. Servers 2.0 mongod mongod mongod mongod mongod mongod Primary mongod

    mongoc mongod mongoc mongod mongoc mongod Main 8 Saturday, 23 February, 13

  31. Servers 2.0 mongod mongod mongod mongod mongod mongod Primary mongod

    mongoc mongod mongoc mongod mongoc mongod mongod Main 8 Saturday, 23 February, 13

  32. Servers 2.0 mongod mongod mongod mongod mongod mongod Primary mongod

    mongoc mongod mongoc mongod mongoc mongod mongod mongod Main 8 Saturday, 23 February, 13

  33. Servers 2.0 mongod mongod mongod mongod mongod mongod Primary mongod

    mongoc mongod mongoc mongod mongoc mongod mongod mongod Main 8 Saturday, 23 February, 13

  34. User Settings { "_id" : 123, "stats_page_empty" : true, "statistics_page_order"

    : [ 1, 4, 2, 3 ] } 9 Saturday, 23 February, 13

  35. Push notifications { "_id" : ObjectId("4fe60f72a3a6a5654b000001"), "status" : 24, "user_id"

    : 1, "photo_id" : 8026403, "actors" : [ 71 ], "action_id" : 0, "updated_at" : ISODate("2012-06-23T18:48:18Z"), "created_at" : ISODate("2012-06-23T18:48:18Z") } { "_id" : ObjectId("4ffc9eb55328f538ad00002d"), "permissions" : [ 0, 1, 5, 10 ], "type" : 1, "user_id" : 357534, "token" : "xxxx xxxx xxxx" } db.mobile_devices db.mobile_notifications 10 Saturday, 23 February, 13

  36. Push notifications { "_id" : ObjectId("4fe60f72a3a6a5654b000001"), "status" : 24, "user_id"

    : 1, "photo_id" : 8026403, "actors" : [ 71 ], "action_id" : 0, "updated_at" : ISODate("2012-06-23T18:48:18Z"), "created_at" : ISODate("2012-06-23T18:48:18Z") } { "_id" : ObjectId("4ffc9eb55328f538ad00002d"), "permissions" : [ 0, 1, 5, 10 ], "type" : 1, "user_id" : 357534, "token" : "xxxx xxxx xxxx" } db.mobile_devices db.mobile_notifications index: {"user_id": 1} 10 Saturday, 23 February, 13

  37. Push notifications { "_id" : ObjectId("4fe60f72a3a6a5654b000001"), "status" : 24, "user_id"

    : 1, "photo_id" : 8026403, "actors" : [ 71 ], "action_id" : 0, "updated_at" : ISODate("2012-06-23T18:48:18Z"), "created_at" : ISODate("2012-06-23T18:48:18Z") } { "_id" : ObjectId("4ffc9eb55328f538ad00002d"), "permissions" : [ 0, 1, 5, 10 ], "type" : 1, "user_id" : 357534, "token" : "xxxx xxxx xxxx" } db.mobile_devices db.mobile_notifications index: {"token": 1}, {sparse: true} index: {"user_id": 1} 10 Saturday, 23 February, 13

  38. Push notifications { "_id" : ObjectId("4fe60f72a3a6a5654b000001"), "status" : 24, "user_id"

    : 1, "photo_id" : 8026403, "actors" : [ 71 ], "action_id" : 0, "updated_at" : ISODate("2012-06-23T18:48:18Z"), "created_at" : ISODate("2012-06-23T18:48:18Z") } { "_id" : ObjectId("4ffc9eb55328f538ad00002d"), "permissions" : [ 0, 1, 5, 10 ], "type" : 1, "user_id" : 357534, "token" : "xxxx xxxx xxxx" } db.mobile_devices db.mobile_notifications index: {"token": 1}, {sparse: true} index: {"registration_id": 1}, {sparse: true} index: {"user_id": 1} 10 Saturday, 23 February, 13

  39. Push notifications { "_id" : ObjectId("4fe60f72a3a6a5654b000001"), "status" : 24, "user_id"

    : 1, "photo_id" : 8026403, "actors" : [ 71 ], "action_id" : 0, "updated_at" : ISODate("2012-06-23T18:48:18Z"), "created_at" : ISODate("2012-06-23T18:48:18Z") } { "_id" : ObjectId("4ffc9eb55328f538ad00002d"), "permissions" : [ 0, 1, 5, 10 ], "type" : 1, "user_id" : 357534, "token" : "xxxx xxxx xxxx" } db.mobile_devices db.mobile_notifications index: {"token": 1}, {sparse: true} index: {"registration_id": 1}, {sparse: true} index: {"user_id": 1} index: {"user_id": 1} 10 Saturday, 23 February, 13

  40. Push notifications { "_id" : ObjectId("4fe60f72a3a6a5654b000001"), "status" : 24, "user_id"

    : 1, "photo_id" : 8026403, "actors" : [ 71 ], "action_id" : 0, "updated_at" : ISODate("2012-06-23T18:48:18Z"), "created_at" : ISODate("2012-06-23T18:48:18Z") } { "_id" : ObjectId("4ffc9eb55328f538ad00002d"), "permissions" : [ 0, 1, 5, 10 ], "type" : 1, "user_id" : 357534, "token" : "xxxx xxxx xxxx" } db.mobile_devices db.mobile_notifications index: {"token": 1}, {sparse: true} index: {"registration_id": 1}, {sparse: true} index: {"user_id": 1} index: {"user_id": 1, "updated_at": -1} index: {"user_id": 1} 10 Saturday, 23 February, 13

  41. Activity Feed - Flow 200M+ { "_id" : ObjectId(""), "aid"

    : 1127689, # Actor id "otype" : 9, # Object type for cast "v" : 7, # Verb of the action "oid" : 25000475, # Object id "uid" : 1127689 # User id } 11 Saturday, 23 February, 13

  42. db.ensureIndex ??? { aid: 1 } { aid: 1, _id:

    1 } { _id: 1, aid: 1 } { aid: 1, v: 1, _id: 1 } 12 Saturday, 23 February, 13

  43. Data access 13 Saturday, 23 February, 13

  44. Data access db.activities.find( aid: 22, v: {'$in': [2,3,4]}) .sort(_id: -1).limit(10)

    13 Saturday, 23 February, 13

  45. { aid: 1 } 14 Saturday, 23 February, 13

  46. { aid: 1, v:1 } { aid: 1, v:1, _id:

    -1 } 15 Saturday, 23 February, 13

  47. { aid: 1, _id: -1 } { aid: 1, _id:

    -1, v: 1 } 16 Saturday, 23 February, 13

  48. 17 Saturday, 23 February, 13

  49. db.activities.find( aid: {'$in': [1,10]}, v: {'$in': [2,3,4]}) .sort(_id: -1).limit(10) 17

    Saturday, 23 February, 13

  50. Shard key ??? 18 Saturday, 23 February, 13

  51. Shard key ??? { aid: 1, v: 1, _id: 1

    } 18 Saturday, 23 February, 13

  52. Mistakes on shard 19 Saturday, 23 February, 13

  53. Mistakes on shard Automatic shard 19 Saturday, 23 February, 13

  54. Mistakes on shard Automatic shard SSDs on Primaries 19 Saturday,

    23 February, 13

  55. After sharding? 20 Saturday, 23 February, 13

  56. After sharding? Good performance on writes 20 Saturday, 23 February,

    13

  57. After sharding? Good performance on User Flow reads Good performance

    on writes 20 Saturday, 23 February, 13

  58. After sharding? Good performance on User Flow reads Bad performance

    on Friends Flow reads Good performance on writes 20 Saturday, 23 February, 13

  59. Solutions: 21 Saturday, 23 February, 13

  60. Solutions: #1: denormalize 21 Saturday, 23 February, 13

  61. { "_id" : ObjectId(""), "user" : 123, # viewer "page"

    : 1, "feed" : [{activity}, {activity}] } Flow Feed by user 22 Saturday, 23 February, 13

  62. { "_id" : ObjectId(""), "user" : 123, # viewer "page"

    : 1, "feed" : [{activity}, {activity}] } Flow Feed by user Fan out on write 22 Saturday, 23 February, 13

  63. Solutions: #1: denormalize 23 Saturday, 23 February, 13

  64. Solutions: #1: denormalize #2: cache 23 Saturday, 23 February, 13

  65. key: user_id 24 Saturday, 23 February, 13

  66. key: user_id prepend activity 24 Saturday, 23 February, 13

  67. key: user_id prepend activity activity append 24 Saturday, 23 February,

    13

  68. key: user_id prepend activity activity append activity append 24 Saturday,

    23 February, 13

  69. Future Denormaziled solution. 25 Saturday, 23 February, 13

  70. Thank you 26 Saturday, 23 February, 13