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  1. HBase
  2. HBASE-23054

Remove synchronization block from MetaTableMetrics and fix LossyCounting algorithm

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    • Reviewed

    Description

      While trying to use LossyCounting for HBASE-15519 , found following bugs in current implementation
      – Remove synchronization block from MetaTableMetrics to avoid congestion at the code 

      – Fix license format

      – Fix LossyCounting algorithm as per http://www.vldb.org/conf/2002/S10P03.pdf 

      – Avoid doing sweep on every insert in LossyCounting

      – Remove extra redundant data structures from MetaTableMetrics.

      Attachments

        1. HBASE-23054.master.002.patch
          19 kB
          Ankit Singhal
        2. HBASE-23054.master.001.patch
          18 kB
          Ankit Singhal

        Issue Links

          is related to

          Sub-task - The sub-task of the issue HBASE-19722 Meta query statistics metrics source

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

          Bug - A problem which impairs or prevents the functions of the product. HBASE-21991 Fix MetaMetrics issues - [Race condition, Faulty remove logic], few improvements

          • Major - Major loss of function.
          • Resolved

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              ankit@apache.org Ankit Singhal
              ankit@apache.org Ankit Singhal
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                Created:
                Updated:
                Resolved: