Uploaded image for project: 'HBase'
  1. HBase
  2. HBASE-862

region balancing is clumsy

    XMLWordPrintableJSON

Details

    • Bug
    • Status: Closed
    • Major
    • Resolution: Won't Fix
    • None
    • None
    • None
    • None

    Description

      Daniel Leffel has an install of 500 regions on 4 nodes. He's running 0.2.0.

      On restart, load balancing is running while the 600 regions are being initially opened. Makes for churn. Load balancing should wait before it cuts in.

      Have also seen on occasion that it will not find equilibrium after a restart.

      Adding a node is catastrophic. >20% of the regions were closed and were taking the longest time to show up on the new server. I would think that the region balancing would work in more sophisticated and gradual manner.

      Attachments

        Issue Links

          incorporates

          Improvement - An improvement or enhancement to an existing feature or task. HBASE-920 Make region balancing sloppier

          • Major - Major loss of function.
          • Closed
          is related to

          Improvement - An improvement or enhancement to an existing feature or task. HBASE-1017 Region balancing does not bring newly added node within acceptable range

          • Minor - Minor loss of function, or other problem where easy workaround is present.
          • Closed
          relates to

          Sub-task - The sub-task of the issue HBASE-918 Region balancing during startup makes cluster unstable

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

          Activity

            People

              Unassigned Unassigned
              stack Michael Stack
              Votes:
              0 Vote for this issue
              Watchers:
              1 Start watching this issue

              Dates

                Created:
                Updated:
                Resolved: