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From "Sujay Rau (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-3478) -setQuota, -setSpaceQuota Issues with Long.Max_Value
Date Wed, 30 May 2012 18:22:23 GMT
Sujay Rau created HDFS-3478:
-------------------------------

             Summary: -setQuota, -setSpaceQuota Issues with Long.Max_Value
                 Key: HDFS-3478
                 URL: https://issues.apache.org/jira/browse/HDFS-3478
             Project: Hadoop HDFS
          Issue Type: Bug
            Reporter: Sujay Rau
            Priority: Minor


[root@c1204 hadoop]# sudo -u hdfs hadoop fs -mkdir testQuotaFolder
[root@c1204 hadoop]# sudo -u hdfs hadoop fs -count -q testQuotaFolder
none inf none inf 1 0 0 testQuotaFolder
[root@c1204 hadoop]# sudo -u hdfs hdfs dfsadmin -setQuota 1000 testQuotaFolder
[root@c1204 hadoop]# sudo -u hdfs hdfs dfsadmin -setSpaceQuota 1000 testQuotaFolder
[root@c1204 hadoop]# sudo -u hdfs hadoop fs -count -q testQuotaFolder
1000 999 1000 1000 1 0 0 testQuotaFolder
[root@c1204 hadoop]# sudo -u hdfs hdfs dfsadmin -setSpaceQuota 9223372036854775807 testQuotaFolder
[root@c1204 hadoop]# sudo -u hdfs hdfs dfsadmin -setQuota 9223372036854775807 testQuotaFolder
[root@c1204 hadoop]# sudo -u hdfs hadoop fs -count -q testQuotaFolder
1000 999 1000 1000 1 0 0 testQuotaFolder
[root@c1204 hadoop]# sudo -u hdfs hdfs dfsadmin -setQuota 9223372036854775806 testQuotaFolder
[root@c1204 hadoop]# sudo -u hdfs hdfs dfsadmin -setSpaceQuota 9223372036854775806 testQuotaFolder
[root@c1204 hadoop]# sudo -u hdfs hadoop fs -count -q testQuotaFolder
9223372036854775806 9223372036854775805 9223372036854775806 9223372036854775806 1 0 0 testQuotaFolder

The documentation at http://hadoop.apache.org/common/docs/r0.20.0/hdfs_quota_admin_guide.html
says that the max quota size is Long.Max_Value which is = 9223372036854775807, but as you
can see above, setting the quota to this value returns no error but doesn't actually change
the quota value. Long.Max_Value - 1 works though.. so the documentation should be changed
to reflect this behavior. Long.Max_Value + 1 returns an actual error (though it isn't the
same as the negative number error):

[root@c1204 hadoop]# sudo -u hdfs hdfs dfsadmin -setSpaceQuota 9223372036854775808 testQuotaFolder
setSpaceQuota: For input string: "9223372036854775808"
Usage: java DFSAdmin [-setSpaceQuota <quota> <dirname>...<dirname>]
[root@c1204 hadoop]# sudo -u hdfs hdfs dfsadmin -setSpaceQuota -1 testQuotaFolder
setSpaceQuota: Illegal option -1


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