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  1. Hadoop HDFS
  2. HDFS-12943 Consistent Reads from Standby Node
  3. HDFS-14822

[SBN read] Revisit GlobalStateIdContext locking when getting server state id

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      Description

      As mentioned under HDFS-14277. One potential performance issue of Observer read is that GlobalStateIdContext#getLastSeenStateId calls getCorrectLastAppliedOrWrittenTxId which ends up acquiring lock on txnid. We internally had some discussion and analysis, we believe this lock can be avoided, by calling the non-locking version method getLastAppliedOrWrittenTxId.

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        1. HDFS-14822.001.patch
          0.9 kB
          Chen Liang

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              • Assignee:
                vagarychen Chen Liang
                Reporter:
                vagarychen Chen Liang
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