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From "Xiao Kang (JIRA)" <j...@apache.org>
Subject [jira] Created: (HDFS-1189) Quota counts missed between clear quota and set quota
Date Mon, 07 Jun 2010 07:37:54 GMT
Quota counts missed between clear quota and set quota
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                 Key: HDFS-1189
                 URL: https://issues.apache.org/jira/browse/HDFS-1189
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: name-node
    Affects Versions: 0.20.2, 0.22.0
            Reporter: Xiao Kang


HDFS Quota counts will be missed between a clear quota operation and a set quota.

When setting quota for a dir, the INodeDirectory will be replaced by INodeDirectoryWithQuota
and dir.isQuotaSet() becomes true. When INodeDirectoryWithQuota  is newly created, quota counting
will be performed. However, when clearing quota, the quota conf is set to -1 and dir.isQuotaSet()
becomes false while INodeDirectoryWithQuota will NOT be replaced back to INodeDirectory.

FSDirectory.updateCount just update the quota count for inodes that isQuotaSet() is true.
So after clear quota for a dir, its quota counts will not be updated and it's reasonable.
But when re seting quota for this dir, quota counting will not be performed and some counts
will be missed.

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