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Apache Jackrabbit Oak on MongoDB Marcel Reutegger | Senior Software Engineer © 2014 Adobe Systems Incorporated. All Rights Reserved.
Apache Jackrabbit Oak © 2014 Adobe Systems Incorporated. All Rights Reserved. 2 About me Software Engineer At Day/Adobe since 2002 JCR API Specification Apache member Apache Jackrabbit / Oak
Contents © 2014 Adobe Systems Incorporated. All Rights Reserved. Adobe Experience Manager Java Content Repository Apache Jackrabbit Oak Multiversion Concurrency Control Transactions Content Addressable Storage Q & A 3
Adobe Experience Manager © 2014 Adobe Systems Incorporated. All Rights Reserved. 4
Adobe Experience Manager – Technology Stack © 2014 Adobe Systems Incorporated. All Rights Reserved. 5 OSGi Container Web Framework Java Content Repository
Adobe Experience Manager – Technology Stack © 2014 Adobe Systems Incorporated. All Rights Reserved. 6 OSGi Container Web Framework Java Content Repository
Adobe Experience Manager – Technology Stack Java Content Repository / Apache Jackrabbit Oak Tar MongoDB RDBMS © 2014 Adobe Systems Incorporated. All Rights Reserved. 7 .tar
Contents © 2014 Adobe Systems Incorporated. All Rights Reserved. Adobe Experience Manager Java Content Repository Apache Jackrabbit Oak Multiversion Concurrency Control Transactions Content Addressable Storage Q & A 8
Java Content Repository – Why? “Build me a web content management system!” © 2014 Adobe Systems Incorporated. All Rights Reserved. 9 Apache PHP Developer happiness Easy: LAMP stack Linux MySQL Done in 2 weeks
Java Content Repository – Why? Build me a web content management system! “Nice, but I want to organize my pages in a hierarchy.” Apply a well known hierarchical database model and update the application. © 2014 Adobe Systems Incorporated. All Rights Reserved. 10 Developer happiness Done in 4 weeks
Java Content Repository – Why? Nice, but I want to organize my pages in a hierarchy. “Can you please add structured and fulltext searches?” Integrate with Apache Solr or Elasticsearch © 2014 Adobe Systems Incorporated. All Rights Reserved. Done in 4 weeks 11 Developer happiness
Java Content Repository – Why? Can you please add structured and fulltext searches? “I accidentally deleted the product page. We need to version our content.” Introduce new tables and rewrite the application. © 2014 Adobe Systems Incorporated. All Rights Reserved. Done in 8 weeks 12 Developer happiness
Java Content Repository – Why? “I accidentally deleted the product page. We need to version our content.” “We cannot publish financial results, unless the system has fine grained access control.” Introduce more tables and © 2014 Adobe Systems Incorporated. All Rights Reserved. integrate with a directory server. I’ll get back to you 13 next year! Developer happiness
Java Content Repository – Features JSR-283 – JCR 2.0 released 2009 Hierarchical - Structured and binary data Query – SQL, XPath and Java language binding Access Control on Node and Property level Versioning – Modeled after WebDAV DeltaV (RFC 3253) Locking – Shallow or deep Asynchronous Observation © 2014 Adobe Systems Incorporated. All Rights Reserved. 14
Contents © 2014 Adobe Systems Incorporated. All Rights Reserved. Adobe Experience Manager Java Content Repository Apache Jackrabbit Oak Multiversion Concurrency Control Transactions Content Addressable Storage Q & A 15
Apache Jackrabbit Oak – Design © 2014 Adobe Systems Incorporated. All Rights Reserved. 16 Cacheable Customizable Scalable Support NoSQL Storage Support Sharding
Apache Jackrabbit Oak – Design © 2014 Adobe Systems Incorporated. All Rights Reserved. 17 Cacheable Customizable Scalable Pluggable Storage Custom Index Definitions
Apache Jackrabbit Oak – Design © 2014 Adobe Systems Incorporated. All Rights Reserved. 18 Cacheable Customizable Scalable Copy-On-Write Multiversion Concurrency Content Addressable Storage
Contents © 2014 Adobe Systems Incorporated. All Rights Reserved. Adobe Experience Manager Java Content Repository Apache Jackrabbit Oak Multiversion Concurrency Control Transactions Content Addressable Storage Q & A 19
Apache Jackrabbit Oak – MVCC & Copy-On-Write © 2014 Adobe Systems Incorporated. All Rights Reserved. 20 Rev 1 / /a /b /a/1 /a/2 /b/1
Apache Jackrabbit Oak – MVCC & Copy-On-Write /a /b /a/1 /a/2 /b/1 /b/2 © 2014 Adobe Systems Incorporated. All Rights Reserved. 21 Rev 1 / new
Apache Jackrabbit Oak – MVCC & Copy-On-Write Rev 2 /a /b /a/1 /a/2 /b/1 /b/2 © 2014 Adobe Systems Incorporated. All Rights Reserved. 22 Rev 1 /b' / /' copy parents
Apache Jackrabbit Oak – MVCC & Copy-On-Write Rev 2 /a /b /a/1 /a/2 /b/1 /b/2 © 2014 Adobe Systems Incorporated. All Rights Reserved. 23 Rev 1 /b' / /' concurrent access to Rev 1 and Rev 2
Apache Jackrabbit Oak – MVCC & Copy-On-Write collect garbage Rev 2 © 2014 Adobe Systems Incorporated. All Rights Reserved. 24 /a /b' /' /a/1 /a/2 /b/1 /b/2
Apache Jackrabbit Oak – MVCC & Copy-On-Write /a /b' /a/1 /a/2 /b/1 /b/2 © 2014 Adobe Systems Incorporated. All Rights Reserved. 25 Rev 2 /' compact
Apache Jackrabbit Oak – MVCC & Copy-On-Write © 2014 Adobe Systems Incorporated. All Rights Reserved. 26 ⊕ ⊖ Stable snapshot view of data Writes do not block reads Higher storage cost Garbage collection
Apache Jackrabbit Oak – The Data Model {! _id : “/home/john”,! name : “john”,! email : “john@example.com”! }! {! _id : “2:/home/john”,! name : { “r14979e4b424-0-1” : “john” },! email : { “r14979e4b424-0-1” : “john@example.com” },! _deleted : { “r14979e4b424-0-1” : “false” },! _revisions : { “r14979e4b424-0-1” : “c” }! }! © 2014 Adobe Systems Incorporated. All Rights Reserved. 27
Apache Jackrabbit Oak – The Data Model {! _id : “2:/home/john”,! name : { “r14979e4b424-0-1” : “john” },! email : { “r14979e4b424-0-1” : “john@example.com” },! _deleted : { “r14979e4b424-0-1” : “false” },! _revisions : { “r14979e4b424-0-1” : “c” }! }! © 2014 Adobe Systems Incorporated. All Rights Reserved. 28
Apache Jackrabbit Oak – The Data Model {! _id : “2:/home/john”,! name : { “r14979e4b424-0-1” : “john” },! email : { “r14979e4b424-0-1” : “john@example.com” },! _deleted : { “r14979e4b424-0-1” : “false” },! _revisions : { “r14979e4b424-0-1” : “c” }! }! Timestamp Counter Cluster ID © 2014 Adobe Systems Incorporated. All Rights Reserved. 29
Apache Jackrabbit Oak – The Data Model {! _id : “2:/home/john”,! name : { “r14979e4b424-0-1” : “john” },! email : {! “r14979e4b424-0-1” : “john@example.com”,! “r14979e6a941-0-1” : “john.doe@example.com”! },! _deleted : { “r14979e4b424-0-1” : “false” },! _revisions : {! “r14979e4b424-0-1” : “c”,! “r14979e6a941-0-1” : “c”! © 2014 Adobe Systems Incorporated. All Rights Reserved. 30 }! }! Change email to “john.doe@example.com”
Contents © 2014 Adobe Systems Incorporated. All Rights Reserved. Adobe Experience Manager Java Content Repository Apache Jackrabbit Oak Multiversion Concurrency Control Transactions Content Addressable Storage Q & A 31
Apache Jackrabbit Oak – Transactions {! _id : “2:/home/john”,! name : { “r14979e4b424-0-1” : “john” },! _deleted : { “r14979e4b424-0-1” : “false” },! _commitRoot : { “r14979e4b424-0-1” : “1” }! }! {! _id : “3:/home/john/profile”,! avatar : { “r14979e4b424-0-1” : <bin> },! _deleted : { “r14979e4b424-0-1” : “false” },! _commitRoot : { “r14979e4b424-0-1” : “1” }! }! © 2014 Adobe Systems Incorporated. All Rights Reserved. 32
Apache Jackrabbit Oak – Transactions © 2014 Adobe Systems Incorporated. All Rights Reserved. 33 },! false” },! 1” }! },! false” },! 1” }! {! _id : “1:/home”,! _deleted : { “r14979e1b312-0-1” : “false” },! _revisions : {! “r14979e1b312-0-1” : “c”,! “r14979e4b424-0-1” : “c”! }! }! Conditional update for commit: {! _id : “1:/home”, ! “_collisions.r14979e4b424-0-1” : { $exists : false }! }!
Apache Jackrabbit Oak – Transactions {! _id : “3:/home/john/profile”,! avatar : {! “r14979e4b424-0-1” : <bin>! },! _deleted : {! “r14979e4b424-0-1” : “false”! },! _commitRoot : {! “r14979e4b424-0-1” : “1” ! }! }! © 2014 Adobe Systems Incorporated. All Rights Reserved. 34
Apache Jackrabbit Oak – Transactions {! _id : “3:/home/john/profile”,! avatar : {! “r14979e4b424-0-1” : <bin>,! “r14979e6c7a2-0-1” : <bin>! },! _deleted : {! “r14979e4b424-0-1” : “false”! },! _commitRoot : {! “r14979e4b424-0-1” : “1”,! “r14979e6c7a2-0-1” : “1” ! }! }! © 2014 Adobe Systems Incorporated. All Rights Reserved. 35 T-1
Apache Jackrabbit Oak – Transactions {! _id : “3:/home/john/profile”,! avatar : {! “r14979e4b424-0-1” : <bin>,! “r14979e6c7a2-0-1” : <bin>,! “r14979e6c7a3-0-1” : <bin>! },! _deleted : {! “r14979e4b424-0-1” : “false”! },! _commitRoot : {! “r14979e4b424-0-1” : “1”,! “r14979e6c7a2-0-1” : “1”,! “r14979e6c7a3-0-1” : “1”! }! }! © 2014 Adobe Systems Incorporated. All Rights Reserved. 36 T-1 T-2
Apache Jackrabbit Oak – Transactions © 2014 Adobe Systems Incorporated. All Rights Reserved. 37 {! _id : “1:/home”,! _deleted : { ! “r14979e1b312-0-1” : “false”! },! _revisions : {! “r14979e1b312-0-1” : “c”! },! _collisions : {! “r14979e6c7a2-0-1” : “true”! }! }! T-2 Conditional update for collision marker: {! _id : “1:/home”, ! “_revisions.r14979e6c7a2-0-1” : { $exists : false }! }!
Apache Jackrabbit Oak – Transactions © 2014 Adobe Systems Incorporated. All Rights Reserved. 38 {! _id : “1:/home”,! _deleted : { ! “r14979e1b312-0-1” : “false”! },! _revisions : {! “r14979e1b312-0-1” : “c”! },! _collisions : {! “r14979e6c7a2-0-1” : “true”! }! }! T-2 T-1 ✗ Conditional update for commit: {! _id : “1:/home”, ! “_collisions.r14979e6c7a2-0-1” : { $exists : false }! }!
Apache Jackrabbit Oak – Transactions © 2014 Adobe Systems Incorporated. All Rights Reserved. 39 {! _id : “1:/home”,! _deleted : { ! “r14979e1b312-0-1” : “false”! },! _revisions : {! “r14979e1b312-0-1” : “c”,! “r14979e6c7a3-0-1” : “c”! },! _collisions : {! “r14979e6c7a2-0-1” : “true”! }! }! T-1 T-2 ✗ {! _id : “1:/home”, ! “_collisions.r14979e6c7a3-0-1” : { $exists : false }! }!
Apache Jackrabbit Oak – Transactions {! _id : “3:/home/john/profile”,! avatar : {! “r14979e4b424-0-1” : <bin>,! “r14979e6c7a2-0-1” : <bin>,! “r14979e6c7a3-0-1” : <bin>! },! _deleted : {! “r14979e4b424-0-1” : “false”! },! _commitRoot : {! “r14979e4b424-0-1” : “1”,! “r14979e6c7a2-0-1” : “1”,! “r14979e6c7a3-0-1” : “1”! }! }! © 2014 Adobe Systems Incorporated. All Rights Reserved. 40 T-1
Contents © 2014 Adobe Systems Incorporated. All Rights Reserved. Adobe Experience Manager Java Content Repository Apache Jackrabbit Oak Multiversion Concurrency Control Transactions Content Addressable Storage Q & A 41
Apache Jackrabbit Oak – Content Addressable Storage © 2014 Adobe Systems Incorporated. All Rights Reserved. 42 GridFS file chunk 0 chunk 1 … chunk N
Apache Jackrabbit Oak – Content Addressable Storage © 2014 Adobe Systems Incorporated. All Rights Reserved. 43 Oak Node Storage Binary Storage Binary Chunk 0x38a7 Chunk 0xc92a Chunk 0x8f91
Apache Jackrabbit Oak – Content Addressable Storage Binary 0x38a7 © 2014 Adobe Systems Incorporated. All Rights Reserved. 44 Oak 0x38a7 Chunk 0x38a7 Chunk 0xc92a Binary Storage Chunk 0x8f91 Hash: Node Storage
Apache Jackrabbit Oak – Content Addressable Storage Binary © 2014 Adobe Systems Incorporated. All Rights Reserved. 45 Oak 0x8f91 Chunk 0x38a7 Chunk 0xc92a Binary Storage Chunk 0x8f91 Hash: 0x38a7 0x8f91 Node Storage
Apache Jackrabbit Oak – Content Addressable Storage Binary © 2014 Adobe Systems Incorporated. All Rights Reserved. 46 Oak 0x52f1 Chunk 0x38a7 Chunk 0xc92a Binary Storage Chunk 0x8f91 Hash: 0x38a7 0x8f91 0x52f1 Chunk 0x52f1 Node Storage
Apache Jackrabbit Oak – Content Addressable Storage © 2014 Adobe Systems Incorporated. All Rights Reserved. 47 Oak Chunk 0x38a7 Chunk 0xc92a Binary Storage Chunk 0x8f91 Chunk 0x52f1 Node Storage 0x38a7 0x8f91 0x52f1
Apache Jackrabbit Oak – Content Addressable Storage © 2014 Adobe Systems Incorporated. All Rights Reserved. 48 ⊕ ⊖ De-duplication on chunk level Chunks are immutable Shared Storage Garbage collection
Summary © 2014 Adobe Systems Incorporated. All Rights Reserved. Adobe Experience Manager Java Content Repository Apache Jackrabbit Oak Multiversion Concurrency Control Transactions Content Addressable Storage Q & A 49
Q & A © 2014 Adobe Systems Incorporated. All Rights Reserved. 50
© 2014 Adobe Systems Incorporated. All Rights Reserved.

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Apache Jackrabbit Oak on MongoDB

  • 1. Apache Jackrabbit Oak on MongoDB Marcel Reutegger | Senior Software Engineer © 2014 Adobe Systems Incorporated. All Rights Reserved.
  • 2. Apache Jackrabbit Oak © 2014 Adobe Systems Incorporated. All Rights Reserved. 2 About me Software Engineer At Day/Adobe since 2002 JCR API Specification Apache member Apache Jackrabbit / Oak
  • 3. Contents © 2014 Adobe Systems Incorporated. All Rights Reserved. Adobe Experience Manager Java Content Repository Apache Jackrabbit Oak Multiversion Concurrency Control Transactions Content Addressable Storage Q & A 3
  • 4. Adobe Experience Manager © 2014 Adobe Systems Incorporated. All Rights Reserved. 4
  • 5. Adobe Experience Manager – Technology Stack © 2014 Adobe Systems Incorporated. All Rights Reserved. 5 OSGi Container Web Framework Java Content Repository
  • 6. Adobe Experience Manager – Technology Stack © 2014 Adobe Systems Incorporated. All Rights Reserved. 6 OSGi Container Web Framework Java Content Repository
  • 7. Adobe Experience Manager – Technology Stack Java Content Repository / Apache Jackrabbit Oak Tar MongoDB RDBMS © 2014 Adobe Systems Incorporated. All Rights Reserved. 7 .tar
  • 8. Contents © 2014 Adobe Systems Incorporated. All Rights Reserved. Adobe Experience Manager Java Content Repository Apache Jackrabbit Oak Multiversion Concurrency Control Transactions Content Addressable Storage Q & A 8
  • 9. Java Content Repository – Why? “Build me a web content management system!” © 2014 Adobe Systems Incorporated. All Rights Reserved. 9 Apache PHP Developer happiness Easy: LAMP stack Linux MySQL Done in 2 weeks
  • 10. Java Content Repository – Why? Build me a web content management system! “Nice, but I want to organize my pages in a hierarchy.” Apply a well known hierarchical database model and update the application. © 2014 Adobe Systems Incorporated. All Rights Reserved. 10 Developer happiness Done in 4 weeks
  • 11. Java Content Repository – Why? Nice, but I want to organize my pages in a hierarchy. “Can you please add structured and fulltext searches?” Integrate with Apache Solr or Elasticsearch © 2014 Adobe Systems Incorporated. All Rights Reserved. Done in 4 weeks 11 Developer happiness
  • 12. Java Content Repository – Why? Can you please add structured and fulltext searches? “I accidentally deleted the product page. We need to version our content.” Introduce new tables and rewrite the application. © 2014 Adobe Systems Incorporated. All Rights Reserved. Done in 8 weeks 12 Developer happiness
  • 13. Java Content Repository – Why? “I accidentally deleted the product page. We need to version our content.” “We cannot publish financial results, unless the system has fine grained access control.” Introduce more tables and © 2014 Adobe Systems Incorporated. All Rights Reserved. integrate with a directory server. I’ll get back to you 13 next year! Developer happiness
  • 14. Java Content Repository – Features JSR-283 – JCR 2.0 released 2009 Hierarchical - Structured and binary data Query – SQL, XPath and Java language binding Access Control on Node and Property level Versioning – Modeled after WebDAV DeltaV (RFC 3253) Locking – Shallow or deep Asynchronous Observation © 2014 Adobe Systems Incorporated. All Rights Reserved. 14
  • 15. Contents © 2014 Adobe Systems Incorporated. All Rights Reserved. Adobe Experience Manager Java Content Repository Apache Jackrabbit Oak Multiversion Concurrency Control Transactions Content Addressable Storage Q & A 15
  • 16. Apache Jackrabbit Oak – Design © 2014 Adobe Systems Incorporated. All Rights Reserved. 16 Cacheable Customizable Scalable Support NoSQL Storage Support Sharding
  • 17. Apache Jackrabbit Oak – Design © 2014 Adobe Systems Incorporated. All Rights Reserved. 17 Cacheable Customizable Scalable Pluggable Storage Custom Index Definitions
  • 18. Apache Jackrabbit Oak – Design © 2014 Adobe Systems Incorporated. All Rights Reserved. 18 Cacheable Customizable Scalable Copy-On-Write Multiversion Concurrency Content Addressable Storage
  • 19. Contents © 2014 Adobe Systems Incorporated. All Rights Reserved. Adobe Experience Manager Java Content Repository Apache Jackrabbit Oak Multiversion Concurrency Control Transactions Content Addressable Storage Q & A 19
  • 20. Apache Jackrabbit Oak – MVCC & Copy-On-Write © 2014 Adobe Systems Incorporated. All Rights Reserved. 20 Rev 1 / /a /b /a/1 /a/2 /b/1
  • 21. Apache Jackrabbit Oak – MVCC & Copy-On-Write /a /b /a/1 /a/2 /b/1 /b/2 © 2014 Adobe Systems Incorporated. All Rights Reserved. 21 Rev 1 / new
  • 22. Apache Jackrabbit Oak – MVCC & Copy-On-Write Rev 2 /a /b /a/1 /a/2 /b/1 /b/2 © 2014 Adobe Systems Incorporated. All Rights Reserved. 22 Rev 1 /b' / /' copy parents
  • 23. Apache Jackrabbit Oak – MVCC & Copy-On-Write Rev 2 /a /b /a/1 /a/2 /b/1 /b/2 © 2014 Adobe Systems Incorporated. All Rights Reserved. 23 Rev 1 /b' / /' concurrent access to Rev 1 and Rev 2
  • 24. Apache Jackrabbit Oak – MVCC & Copy-On-Write collect garbage Rev 2 © 2014 Adobe Systems Incorporated. All Rights Reserved. 24 /a /b' /' /a/1 /a/2 /b/1 /b/2
  • 25. Apache Jackrabbit Oak – MVCC & Copy-On-Write /a /b' /a/1 /a/2 /b/1 /b/2 © 2014 Adobe Systems Incorporated. All Rights Reserved. 25 Rev 2 /' compact
  • 26. Apache Jackrabbit Oak – MVCC & Copy-On-Write © 2014 Adobe Systems Incorporated. All Rights Reserved. 26 ⊕ ⊖ Stable snapshot view of data Writes do not block reads Higher storage cost Garbage collection
  • 27. Apache Jackrabbit Oak – The Data Model {! _id : “/home/john”,! name : “john”,! email : “john@example.com”! }! {! _id : “2:/home/john”,! name : { “r14979e4b424-0-1” : “john” },! email : { “r14979e4b424-0-1” : “john@example.com” },! _deleted : { “r14979e4b424-0-1” : “false” },! _revisions : { “r14979e4b424-0-1” : “c” }! }! © 2014 Adobe Systems Incorporated. All Rights Reserved. 27
  • 28. Apache Jackrabbit Oak – The Data Model {! _id : “2:/home/john”,! name : { “r14979e4b424-0-1” : “john” },! email : { “r14979e4b424-0-1” : “john@example.com” },! _deleted : { “r14979e4b424-0-1” : “false” },! _revisions : { “r14979e4b424-0-1” : “c” }! }! © 2014 Adobe Systems Incorporated. All Rights Reserved. 28
  • 29. Apache Jackrabbit Oak – The Data Model {! _id : “2:/home/john”,! name : { “r14979e4b424-0-1” : “john” },! email : { “r14979e4b424-0-1” : “john@example.com” },! _deleted : { “r14979e4b424-0-1” : “false” },! _revisions : { “r14979e4b424-0-1” : “c” }! }! Timestamp Counter Cluster ID © 2014 Adobe Systems Incorporated. All Rights Reserved. 29
  • 30. Apache Jackrabbit Oak – The Data Model {! _id : “2:/home/john”,! name : { “r14979e4b424-0-1” : “john” },! email : {! “r14979e4b424-0-1” : “john@example.com”,! “r14979e6a941-0-1” : “john.doe@example.com”! },! _deleted : { “r14979e4b424-0-1” : “false” },! _revisions : {! “r14979e4b424-0-1” : “c”,! “r14979e6a941-0-1” : “c”! © 2014 Adobe Systems Incorporated. All Rights Reserved. 30 }! }! Change email to “john.doe@example.com”
  • 31. Contents © 2014 Adobe Systems Incorporated. All Rights Reserved. Adobe Experience Manager Java Content Repository Apache Jackrabbit Oak Multiversion Concurrency Control Transactions Content Addressable Storage Q & A 31
  • 32. Apache Jackrabbit Oak – Transactions {! _id : “2:/home/john”,! name : { “r14979e4b424-0-1” : “john” },! _deleted : { “r14979e4b424-0-1” : “false” },! _commitRoot : { “r14979e4b424-0-1” : “1” }! }! {! _id : “3:/home/john/profile”,! avatar : { “r14979e4b424-0-1” : <bin> },! _deleted : { “r14979e4b424-0-1” : “false” },! _commitRoot : { “r14979e4b424-0-1” : “1” }! }! © 2014 Adobe Systems Incorporated. All Rights Reserved. 32
  • 33. Apache Jackrabbit Oak – Transactions © 2014 Adobe Systems Incorporated. All Rights Reserved. 33 },! false” },! 1” }! },! false” },! 1” }! {! _id : “1:/home”,! _deleted : { “r14979e1b312-0-1” : “false” },! _revisions : {! “r14979e1b312-0-1” : “c”,! “r14979e4b424-0-1” : “c”! }! }! Conditional update for commit: {! _id : “1:/home”, ! “_collisions.r14979e4b424-0-1” : { $exists : false }! }!
  • 34. Apache Jackrabbit Oak – Transactions {! _id : “3:/home/john/profile”,! avatar : {! “r14979e4b424-0-1” : <bin>! },! _deleted : {! “r14979e4b424-0-1” : “false”! },! _commitRoot : {! “r14979e4b424-0-1” : “1” ! }! }! © 2014 Adobe Systems Incorporated. All Rights Reserved. 34
  • 35. Apache Jackrabbit Oak – Transactions {! _id : “3:/home/john/profile”,! avatar : {! “r14979e4b424-0-1” : <bin>,! “r14979e6c7a2-0-1” : <bin>! },! _deleted : {! “r14979e4b424-0-1” : “false”! },! _commitRoot : {! “r14979e4b424-0-1” : “1”,! “r14979e6c7a2-0-1” : “1” ! }! }! © 2014 Adobe Systems Incorporated. All Rights Reserved. 35 T-1
  • 36. Apache Jackrabbit Oak – Transactions {! _id : “3:/home/john/profile”,! avatar : {! “r14979e4b424-0-1” : <bin>,! “r14979e6c7a2-0-1” : <bin>,! “r14979e6c7a3-0-1” : <bin>! },! _deleted : {! “r14979e4b424-0-1” : “false”! },! _commitRoot : {! “r14979e4b424-0-1” : “1”,! “r14979e6c7a2-0-1” : “1”,! “r14979e6c7a3-0-1” : “1”! }! }! © 2014 Adobe Systems Incorporated. All Rights Reserved. 36 T-1 T-2
  • 37. Apache Jackrabbit Oak – Transactions © 2014 Adobe Systems Incorporated. All Rights Reserved. 37 {! _id : “1:/home”,! _deleted : { ! “r14979e1b312-0-1” : “false”! },! _revisions : {! “r14979e1b312-0-1” : “c”! },! _collisions : {! “r14979e6c7a2-0-1” : “true”! }! }! T-2 Conditional update for collision marker: {! _id : “1:/home”, ! “_revisions.r14979e6c7a2-0-1” : { $exists : false }! }!
  • 38. Apache Jackrabbit Oak – Transactions © 2014 Adobe Systems Incorporated. All Rights Reserved. 38 {! _id : “1:/home”,! _deleted : { ! “r14979e1b312-0-1” : “false”! },! _revisions : {! “r14979e1b312-0-1” : “c”! },! _collisions : {! “r14979e6c7a2-0-1” : “true”! }! }! T-2 T-1 ✗ Conditional update for commit: {! _id : “1:/home”, ! “_collisions.r14979e6c7a2-0-1” : { $exists : false }! }!
  • 39. Apache Jackrabbit Oak – Transactions © 2014 Adobe Systems Incorporated. All Rights Reserved. 39 {! _id : “1:/home”,! _deleted : { ! “r14979e1b312-0-1” : “false”! },! _revisions : {! “r14979e1b312-0-1” : “c”,! “r14979e6c7a3-0-1” : “c”! },! _collisions : {! “r14979e6c7a2-0-1” : “true”! }! }! T-1 T-2 ✗ {! _id : “1:/home”, ! “_collisions.r14979e6c7a3-0-1” : { $exists : false }! }!
  • 40. Apache Jackrabbit Oak – Transactions {! _id : “3:/home/john/profile”,! avatar : {! “r14979e4b424-0-1” : <bin>,! “r14979e6c7a2-0-1” : <bin>,! “r14979e6c7a3-0-1” : <bin>! },! _deleted : {! “r14979e4b424-0-1” : “false”! },! _commitRoot : {! “r14979e4b424-0-1” : “1”,! “r14979e6c7a2-0-1” : “1”,! “r14979e6c7a3-0-1” : “1”! }! }! © 2014 Adobe Systems Incorporated. All Rights Reserved. 40 T-1
  • 41. Contents © 2014 Adobe Systems Incorporated. All Rights Reserved. Adobe Experience Manager Java Content Repository Apache Jackrabbit Oak Multiversion Concurrency Control Transactions Content Addressable Storage Q & A 41
  • 42. Apache Jackrabbit Oak – Content Addressable Storage © 2014 Adobe Systems Incorporated. All Rights Reserved. 42 GridFS file chunk 0 chunk 1 … chunk N
  • 43. Apache Jackrabbit Oak – Content Addressable Storage © 2014 Adobe Systems Incorporated. All Rights Reserved. 43 Oak Node Storage Binary Storage Binary Chunk 0x38a7 Chunk 0xc92a Chunk 0x8f91
  • 44. Apache Jackrabbit Oak – Content Addressable Storage Binary 0x38a7 © 2014 Adobe Systems Incorporated. All Rights Reserved. 44 Oak 0x38a7 Chunk 0x38a7 Chunk 0xc92a Binary Storage Chunk 0x8f91 Hash: Node Storage
  • 45. Apache Jackrabbit Oak – Content Addressable Storage Binary © 2014 Adobe Systems Incorporated. All Rights Reserved. 45 Oak 0x8f91 Chunk 0x38a7 Chunk 0xc92a Binary Storage Chunk 0x8f91 Hash: 0x38a7 0x8f91 Node Storage
  • 46. Apache Jackrabbit Oak – Content Addressable Storage Binary © 2014 Adobe Systems Incorporated. All Rights Reserved. 46 Oak 0x52f1 Chunk 0x38a7 Chunk 0xc92a Binary Storage Chunk 0x8f91 Hash: 0x38a7 0x8f91 0x52f1 Chunk 0x52f1 Node Storage
  • 47. Apache Jackrabbit Oak – Content Addressable Storage © 2014 Adobe Systems Incorporated. All Rights Reserved. 47 Oak Chunk 0x38a7 Chunk 0xc92a Binary Storage Chunk 0x8f91 Chunk 0x52f1 Node Storage 0x38a7 0x8f91 0x52f1
  • 48. Apache Jackrabbit Oak – Content Addressable Storage © 2014 Adobe Systems Incorporated. All Rights Reserved. 48 ⊕ ⊖ De-duplication on chunk level Chunks are immutable Shared Storage Garbage collection
  • 49. Summary © 2014 Adobe Systems Incorporated. All Rights Reserved. Adobe Experience Manager Java Content Repository Apache Jackrabbit Oak Multiversion Concurrency Control Transactions Content Addressable Storage Q & A 49
  • 50. Q & A © 2014 Adobe Systems Incorporated. All Rights Reserved. 50
  • 51. © 2014 Adobe Systems Incorporated. All Rights Reserved.