[HADOOP-3187] Quotas for name space management

• Type: New Feature
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.18.0
• Hadoop Flags: Reviewed

Release Note

Introduced directory quota as hard limits on the number of names in the tree rooted at that directory. An administrator may set quotas on individual directories explicitly. Newly created directories have no associated quota. File/directory creations fault if the quota would be exceeded. The attempt to set a quota faults if the directory would be in violation of the new quota.

• Assignee: Hairong Kuang
• Reporter: Robert Chansler
• Created: 05/Apr/08 00:18
• Updated: 18/Jun/15 18:37
• Resolved: 05/Jun/08 06:13

Description

Create a quota mechanism for name space management.

Quota set at a directory by super user restricts that number of names in and below that directory.

Quota tested by create() and rename().

Issue Links

• depends upon: HADOOP-3409 NameNode should save the root inode into fsimage
• is related to: HDFS-8625 count with -h option displays namespace quota in human readable format
• is related to: HADOOP-3938 Quotas for disk space management