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  1. HBase
  2. HBASE-1676

load balancing on a large cluster doesn't work very well

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Details

    • Bug
    • Status: Closed
    • Major
    • Resolution: Fixed
    • 0.20.0
    • 0.90.0
    • None
    • None

    Description

      I have 200 regions per server in my cluster. When I take one down, then bring it back up, I only end up with about 30 regions assigned to it. This is highly reproducible.

      Furthermore, the assignment algorithm will do silly things like assign all regions of a table to one regionserver - even if it's the best server. We need to be smarter about optimizing how regions are assigned if we want to achieve maximal performance on our clusters.

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          is blocked by

          Sub-task - The sub-task of the issue HBASE-2699 Reimplement load balancing to be a background process and to not use heartbeats

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed
          is part of

          Improvement - An improvement or enhancement to an existing feature or task. HBASE-2480 Smarter load-balancing

          • Major - Major loss of function.
          • Closed

          Task - A task that needs to be done. HBASE-1816 Master rewrite

          • Blocker - Blocks development and/or testing work, production could not run
          • Closed

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              Unassigned Unassigned
              ryanobjc ryan rawson
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                Created:
                Updated:
                Resolved: