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  1. HBase
  2. HBASE-27764

scan table is slow when enter hbase shell first time

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Details

    • Bug
    • Status: Open
    • Major
    • Resolution: Unresolved
    • 2.4.14
    • None
    • Client, shell
    • None

    Description

      When we test HBase 2.4.14 on our cluster...

      I find we  scan a table is slow when enter hbase shell first time.

      step like this:

      hbase shell

      scan 'hbase:meta',{LIMIT=>1}

      the cost time is more than HBase 1.3

      Any one can help compare the two versions(HBase 2.x vs HBase 1.x) in first scan process?

      thanks~

       

      -------

      I find the the “Future<Result> f = cs.poll(timeBeforeReplicas, TimeUnit.MICROSECONDS);” in org.apache.hadoop.hbase.client.RpcRetryingCallerWithReadReplicas#call 

      cost above 200+ms

       

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          is related to

          Bug - A problem which impairs or prevents the functions of the product. HBASE-19260 Add lock back to avoid parallel accessing meta to locate region

          • Major - Major loss of function.
          • Resolved

          Improvement - An improvement or enhancement to an existing feature or task. HBASE-27228 Client connection warming API

          • Major - Major loss of function.
          • Open

          Improvement - An improvement or enhancement to an existing feature or task. HBASE-26590 Hbase-client Meta lookup performance regression between hbase-1 and hbase-2

          • Major - Major loss of function.
          • Resolved

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              Unassigned Unassigned
              chaijunjie chaijunjie
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              Dates

                Created:
                Updated: