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  1. 09 Jan, 2012 2 commits
  3. 06 Jan, 2012 1 commit
  5. 02 Jan, 2012 1 commit
  7. 20 Dec, 2011 1 commit
    • Vincent Pelletier's avatar
      Create masters as we are notified of their existence. · 59e7aafb
      Vincent Pelletier authored 
      This increases cluster on-line flexibility, allowing new masters to be
added without needing a restart of all masters.
Downside is that more responsibility is pushed to cluster admins: they must
update node configurations so they contain enough master nodes to allow
them to join cluster after a restart.
      59e7aafb
  9. 09 Nov, 2011 1 commit
  11. 26 Oct, 2011 4 commits
  13. 25 Oct, 2011 1 commit
  15. 17 Oct, 2011 1 commit
  17. 11 Oct, 2011 2 commits
    • Julien Muchembled's avatar
      Fix protocol and DB schema so that storages can handle transactions of any size · d5c469be
      Julien Muchembled authored 
      - Change protocol to use SHA1 for all checksums:
  - Use SHA1 instead of CRC32 for data checksums.
  - Use SHA1 instead of MD5 for replication.

- Change DatabaseManager API so that backends can store raw data separately from
  object metadata:
  - When processing AskStoreObject, call the backend to store the data
    immediately, instead of keeping it in RAM or in the temporary object table.
    Data is then referenced only by its checksum.
    Without such change, the storage could fail to store the transaction due to
    lack of RAM, or it could make tpc_finish step very slow.
  - Backends have to store data in a separate space, and remove entries as soon
    as they get unreferenced. So they must have an index of checksums in object
    metadata space. A new '_uncommitted_data' backend attribute keeps references
    of uncommitted data.
  - New methods: _pruneData, _storeData, storeData, unlockData
  - MySQL: change vertical partitioning of 'obj' by having data in a separate
    'data' table instead of using a shortened 'obj_short' table.
  - BTree: data is moved from '_obj' to a new '_data' btree.

- Undo is optimized so that backpointers are not required anymore to fetch data:
  - The checksum of an object is None only when creation is undone.
  - Removed DatabaseManager methods: _getObjectData, _getDataTIDFromData
  - DatabaseManager: move some code from _getDataTID to findUndoTID so that
    _getDataTID only has what's specific to backend.

- Removed because already covered by ZODB tests:
  - neo.tests.storage.testStorageDBTests.StorageDBTests.test__getDataTID
  - neo.tests.storage.testStorageDBTests.StorageDBTests.test__getDataTIDFromData
      d5c469be
    • Julien Muchembled's avatar
      Allow NEO to store empty values · d90c5b83
      Julien Muchembled authored 
      This changes how NEO stores undo information
and how it is transmitted on the network.
      d90c5b83
  19. 06 Oct, 2011 1 commit
  21. 16 Sep, 2011 1 commit
  23. 15 Sep, 2011 3 commits
  25. 08 Sep, 2011 1 commit
  27. 06 Sep, 2011 1 commit
  29. 03 Sep, 2011 3 commits
  31. 01 Sep, 2011 2 commits
  33. 31 Aug, 2011 4 commits
  35. 24 Jun, 2011 4 commits
  37. 23 Jun, 2011 1 commit
  39. 22 Jun, 2011 2 commits
  41. 16 Jun, 2011 1 commit
  43. 09 Jun, 2011 2 commits
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