Couchbase Lite OSCON

Lightweight embedded database for iOS and Android. This presentation focussed on the data structures you need to create a reliable mobile sync engine.

Transcript

1. Lite
2. Sync  is  the  Future  of  Mobile  Data
3. What  is  Sync? Lite
4. Data  Structures
5. Collec9on  Sync  & Conflict  Management
6. Collec9on  Sync •Brute  Force •Merkle  Trees •Sparse  Sequences
7. Ini9al  Sync   3 1 2 5 4 A B 3 1 2 5 4
8. Brute  Force 3 1 2 5 4 A B 3ʹ′ 1 2ʹ′ 5ʹ′ 4 3ʹ′ 1 2ʹ′ 5ʹ′ 4
9. Merkle  Trees 3 1 2 5 4 A B 1 5ʹ′ 4 3ʹ′ 2ʹ′ 5ʹ′ 3ʹ′ 2ʹ′
10. Sparse  Sequences 3 1 2 5 4 A B 1 5ʹ′ 4 3ʹ′ 2ʹ′ 5ʹ′ 3ʹ′ 2ʹ′
11. Sparse  Sequences  allow  Subset  Sync 2 4 A B 1 5ʹ′ 4 3ʹ′ 2ʹ′ 2ʹ′ 3 1 5 C 5ʹ′ 3ʹ′
12. Collec9on  Sync •Brute  Force •Merkle  Trees •Sparse  Sequences
13. Vector  Clocks • Scale  with  the  #  of  processes  upda9ng  an  item
14. Revision  Trees {counter,  content  hash} 4-­‐3a14f7d8 5-­‐d7ad89bd 4 4 4 3 3 3 2 2 2 3
15. Revision  Trees 1 2 3 1 2 3 4 4
16. Revision  Trees 1 2 3 1 2 3 4 4 4
17. Revision  Trees 1 2 3 1 2 3 4 4 4
18. Revision  Trees 1 2 3 4 1 2 3 4 4 4
19. Revision  Trees 1 2 3 4 4 1 2 3 4 4
20. Revision  Trees 1 2 3 1 2 3 1 2 3 4 4 4 4 4 3 4
21. Revision  Trees 1 2 3 1 2 1 2 3 4 4 4 4 4 3 3 4
22. Revision  Trees 1 2 3 1 2 1 2 3 4 4 4 4 4 3 3 4 5 4
23. Revision  Trees 1 2 3 1 2 1 2 3 4 4 4 3 3 4 5 5 4 4
24. Revision  Trees 1 2 3 1 2 1 2 4 4 3 3 4 5 5 3 3 4 4 5 4 4
25. Conflict  Detec9on  and  Management •Vector  Clocks •Revision  Trees
26. Couchbase  Lite
27. Couchbase  Lite Dalvik Cocoa Couchbase   Lite Couchbase   Lite • NoSQL ­ JSON  documents ­ binary  a7achments ­ views  and  queries • Lightweight ­ na;ve  Objec;ve-­‐C  /  Java ­ less  than  1MB  library  size • Robust ­ SQLite  storage  engine  is  part  of  the   opera;ng  system  standard  library “The  best  database  for  mobile  devices.”
28. Sync  Gateway Sync  Gateway App  Server Access   Control Push   No;fica;ons etc Couchbase  Server • Sync  Engine ­ HTTP  sync  protocol ­ Compa;ble  with  lots  of  clients • Access  Control ­ User  management ­ Channels ­ Applica;on  override! • Easy  to  deploy ­ Go  run;me  works  on  all  supported   Couchbase  Server  plaQorms ­ Buil;n  lightweight  storage  for   development  mode
29. Sync  Gateway App  Server Access   Control HTTP  /  JSON Sync Couchbase  Server Dalvik Cocoa Couchbase   Lite Couchbase   Lite Push   No;fica;ons etc
30. One Page of Cloud
33. One  Page  of  Cloud
34. Data Routing Data Data
35. Data Routing Data Data Data
36. Data Routing Data Data Data Data
37. Data Routing Data D ata Data Data Data
38. Data Routing Data D ata Data Data Data Data
39. Data Routing Data Data Data Data Data Data
40. Demo  -­‐  CouchChat
41. New  PhoneGap  Plugin haps://github.com/couchbaselabs/LiteGap plugman  -­‐-­‐platform  $PLATFORM  -­‐-­‐project  ~/MyPhoneGapApp  -­‐-­‐plugin  https://github.com/couchbaselabs/LiteGap.git
42. Use  Cases
43. Medical  Records • NoSQL  flexible  schema  integrates  well  with  exis9ng  systems • Staff  can  carry  data  with  them  to  pa9ents • WiFi  limited  in  hospitals
44. Retail  /  Loyalty  /  Point  of  Sale •  
45. Airline • Flight  plans • Passenger  manifest  and  purchases • Mobile  to  mobile  sync  in  the  air • Connects  to  cloud  on  the  ground
46. Personal  Data Timebox by Pepper Networks • contacts,  photos,  etc
47. Games  and Social  Media • Fine  grained  sharing  &  messaging • Great  for  turn-­‐based  games,  chat
48. Collabora9on  “Groupware” • Con9nuous  sync • Conflict  detec9on • Rich  data  model h7p://www.hubapp.com/
49. Thank  You Chris  Anderson      @jchris haps://groups.google.com/forum/#!forum/mobile-­‐couchbase haps://github.com/couchbaselabs/LiteGap haps://github.com/couchbase/couchbase-­‐lite-­‐ios haps://github.com/couchbase/couchbase-­‐lite-­‐android