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  1. HBase
  2. HBASE-25666

Explain why balancer is skipping runs

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      Balancer needs to find the balance of keeping cluster balanced and stable. There is a configuration minCostNeedBalance as the threshold of imbalance to try to balance. Since we use a single score to combine all the factors we consider, it is hard for operation to understand why balancer is "stuck". We should add to master-status UI to show balancer is skipping runs and explain all factors considered, such as the weight and cost of all cost functions.

       

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          is a child of

          Improvement - An improvement or enhancement to an existing feature or task. HBASE-25697 StochasticBalancer improvement for large scale clusters

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

          New Feature - A new feature of the product, which has yet to be developed. HBASE-24528 Improve balancer decision observability

          • Major - Major loss of function.
          • Resolved
          relates to

          Improvement - An improvement or enhancement to an existing feature or task. HBASE-25697 StochasticBalancer improvement for large scale clusters

          • Major - Major loss of function.
          • Open

          Improvement - An improvement or enhancement to an existing feature or task. HBASE-25906 UI of master-status to show recent history of balancer desicion

          • Major - Major loss of function.
          • Resolved
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              GeorryHuang Zhuoyue Huang
              claraxiong Clara Xiong
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