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  1. HBase
  2. HBASE-2406

Define semantics of cell timestamps/versions

    Details

    • Type: Task
    • Status: Closed
    • Priority: Critical
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 0.90.0
    • Component/s: documentation
    • Labels:
      None

      Description

      There is a lot of general confusion over the semantics of the cell timestamp. In particular, a couple questions that often come up:

      • If multiple writes to a cell have the same timestamp, are all versions maintained or just the last?
      • Is it OK to write cells in a non-increasing timestamp order?

      Let's discuss, figure out what semantics make sense, and then move towards (a) documentation, (b) unit tests that prove we have those semantics.

        Attachments

        1. versions.html
          12 kB
          stack
        2. 2406.txt
          22 kB
          stack

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              • Assignee:
                pranavkhaitan Pranav Khaitan
                Reporter:
                tlipcon Todd Lipcon
              • Votes:
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                • Created:
                  Updated:
                  Resolved: