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Posted to hdfs-dev@hadoop.apache.org by "Ming Ma (JIRA)" <ji...@apache.org> on 2012/10/03 00:01:08 UTC

[jira] [Created] (HDFS-3998) Speed up fsck

Ming Ma created HDFS-3998:
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             Summary: Speed up fsck
                 Key: HDFS-3998
                 URL: https://issues.apache.org/jira/browse/HDFS-3998
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: name-node
            Reporter: Ming Ma


We have some big clusters. Sometimes we want to find out the list of missing blocks or blocks with only one replica quickly. Currently fsck has to take a path as input and it then recursively check for inconsistency. That could take a long time to find the missing blocks and the files the missing blocks belong to. It will be useful to speed this up. For example, it could go directly to missing blocks stored in NN and do the file lookup instead.

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