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From "Zhe Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-7211) Block invalidation work should be ordered
Date Wed, 08 Oct 2014 17:06:33 GMT
Zhe Zhang created HDFS-7211:

             Summary: Block invalidation work should be ordered
                 Key: HDFS-7211
                 URL: https://issues.apache.org/jira/browse/HDFS-7211
             Project: Hadoop HDFS
          Issue Type: Bug
            Reporter: Zhe Zhang
            Assignee: Zhe Zhang

{{InvalidateBlocks#node2blocks}} uses an unordered {{LightWeightHashSet}} to store blocks
(to be invalidated) on the same DN. This causes poor ordering when a single DN has a large
number of blocks to invalidate. Blocks should be invalidated following the order of invalidation
commands -- at least roughly. 

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