[HDFS-3478] Test quotas with Long.Max_Value

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.0.0-alpha
• Fix Version/s: 3.0.0-alpha1
• Component/s: namenode
• Labels: newbie
• Hadoop Flags: Reviewed
• Assignee: Sujay Rau
• Reporter: Sujay Rau
• Created: 30/May/12 18:22
• Updated: 12/May/16 18:12
• Resolved: 13/Jun/12 05:04

Description

[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