Uploaded image for project: 'HBase'
  1. HBase
  2. HBASE-25382

Super Split Meta

Add voteVotersWatch issueWatchersCreate sub-taskLinkCloneUpdate Comment AuthorReplace String in CommentUpdate Comment VisibilityDelete Comments
    XMLWordPrintableJSON

Details

    • Umbrella
    • Status: Open
    • Major
    • Resolution: Unresolved
    • None
    • None
    • meta
    • None

    Description

      Currently, the hbase:meta Table is made of one Region only. It is not splittable. We would like to make it so the hbase:meta table can be split just as we for user-space tables as they grow in size.

      Why split the hbase:meta table?

      A single Region hbase:meta Table hotspots as cluster size grows. At extreme, hotspotting brings on special-casing with deploys dedicating nodes solely to the hosting of the single hbase:meta Region to better carry the higher load (but also to isolate hbase:meta if heavily trafficked neighbor Regions). Splitting, currently disallowed, will enable distributing the hbase:meta Table Regions, and thereby load, across the cluster. A splittable hbase:meta table will also alleviate concerns enlarging the hbase:meta table whether by adding more meta data per Region entry – e.g. keeping the list of Region HFiles in the hbase:meta table – or running with more, smaller Regions rather than a few large Regions.

      This is not the first issue to concern itself with meta splitting (HBASE-11288, HBASE-24950). By aggreement. – see the base of HBASE-11288 – this issue supplants all previous JIRAs and design efforts. It is a reset. We start by listing requirements in the attached Super Split Meta Design.

      Attachments

        Issue Links

        Activity

          This comment will be Viewable by All Users Viewable by All Users
          Cancel

          People

            Unassigned Unassigned
            stack Michael Stack

            Dates

              Created:
              Updated:

              Slack

                Issue deployment