Derby
  1. Derby
  2. DERBY-2922 Replication: Add master replication mode
  3. DERBY-3051

Replication: Modify logging subsystem to append log records to the replication buffer when in replication master mode

    Details

    • Type: Sub-task Sub-task
    • Status: Closed
    • Priority: Major Major
    • Resolution: Fixed
    • Affects Version/s: 10.4.1.3
    • Fix Version/s: 10.4.1.3
    • Component/s: Services, Store
    • Labels:
      None

      Description

      When Derby has the replication master role for a database 'x', it should ship all log records generated for this database to the Derby with the slave role. A replication buffer was added to Derby in DERBY-2926. This issue is for modifying the logging subsystem to append log records to this buffer every time a log records is appended to the disk buffer (LogAccessFile). This will, of course, only be done if it has the master role.

      Currently, I have identified two modifications that will be required in LogToFile:

      • LogToFile#appendLogRecord needs to append to the replication buffer after appending to the disk buffer
      • LogToFile#flush (i.e., the method used to force buffered log records to disk) must notify the Master Controller (DERBY-2977) that a flush has taken place. The MasterController will decide if any action is required because of this.
      1. derby_3051_1b.stat
        0.4 kB
        Jørgen Løland
      2. derby_3051_1b.diff
        14 kB
        Jørgen Løland
      3. derby_3051_1.stat
        0.4 kB
        Jørgen Løland
      4. derby_3051_1.diff
        10 kB
        Jørgen Løland

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            • Assignee:
              Jørgen Løland
              Reporter:
              Jørgen Løland
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              Dates

              • Created:
                Updated:
                Resolved:

                Development