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  1. HBase
  2. HBASE-24943 Cleanup unnecessary usages of MetaTableAccessor
  3. HBASE-25185

Remove the usage of MetaTableAccessor in hbase-balancer

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    Details

    • Type: Sub-task
    • Status: Open
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: Balancer, meta
    • Labels:
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      Description

      Let's try to find a way to move MTA to hbase-server. Putting it in hbase-balancer is a bit weird (Why is the MetaTableAccessor in the balancer module?).

      MetaTableAccessor (MTA) is in hbase-balancer because the favored nodes (FN) feature wants to write to meta.

      The FN feature (HBASE-7932 which arrived in hbase-0.96.0) I believe is unused. The idea of maintaining locality across a crash is a good one but having to enable a different balancer to default to enable FN operation has made it so the feature has been let rot. HBASE-21014 makes an appeal for integrating FN into the default stochastic balancer. HBASE-15531 is an old effort that actually tried to integrate FN into stochastic balancer but stalled out.

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              • Assignee:
                Unassigned
                Reporter:
                zhangduo Duo Zhang
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                • Created:
                  Updated: