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Posted to hdfs-dev@hadoop.apache.org by "Hairong Kuang (JIRA)" <ji...@apache.org> on 2010/10/14 22:22:33 UTC

[jira] Created: (HDFS-1458) Improve checkpoint performance by avoiding uncessary image downloads

Improve checkpoint performance by avoiding uncessary image downloads
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                 Key: HDFS-1458
                 URL: https://issues.apache.org/jira/browse/HDFS-1458
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: name-node
    Affects Versions: 0.22.0
            Reporter: Hairong Kuang
            Assignee: Hairong Kuang
             Fix For: 0.22.0


If secondary namenode could verify that the image it has on its disk is the same as the one in the primary NameNode, it could skip downloading the image from the primary NN, thus completely eliminating the image download overhead.

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