HBase
  1. HBase
  2. HBASE-1011

Keep data in Memcache until specified TTL or memory pressure

    Details

    • Type: New Feature New Feature
    • Status: Resolved
    • Priority: Major Major
    • Resolution: Invalid
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: None
    • Labels:
      None

      Description

      In thinking about ways to improve random-read access, a very typical access pattern for web sites is to primarily be retrieving from new records but having a much larger total dataset in a given table.

      If you could specify a Memcache flush TTL, you could keep "past 24 hours" in memory and this would give you a sliding window updated on memcache flushes. Must also adapt to regionserver memory pressure.

        Activity

        Hide
        stack added a comment -

        Non-critical feature. Moving out of 0.20.0.

        Show
        stack added a comment - Non-critical feature. Moving out of 0.20.0.
        Hide
        Jonathan Gray added a comment -

        No longer valid.

        Show
        Jonathan Gray added a comment - No longer valid.
        Hide
        Haoyuan Li added a comment -

        Will this feature be supported in future?

        Show
        Haoyuan Li added a comment - Will this feature be supported in future?
        Hide
        ryan rawson added a comment -

        Hi,

        This issue is invalid and has been closed. The functionality has been more or less effectively replaced by effective block caching in 0.20+.

        Show
        ryan rawson added a comment - Hi, This issue is invalid and has been closed. The functionality has been more or less effectively replaced by effective block caching in 0.20+.

          People

          • Assignee:
            Unassigned
            Reporter:
            Jonathan Gray
          • Votes:
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            Watchers:
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            Dates

            • Created:
              Updated:
              Resolved:

              Development