[HDFS-2946] HA: Put a cap on the number of completed edits files retained by the NN

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.1-alpha
• Fix Version/s: 2.0.3-alpha
• Component/s: ha, namenode
• Target Version/s: 2.0.3-alpha
• Hadoop Flags: Reviewed
• Assignee: Aaron Myers
• Reporter: Aaron Myers
• Created: 14/Feb/12 00:44
• Updated: 15/Feb/13 13:12
• Resolved: 16/Oct/12 02:00

Description

HDFS-2794 added a minimum number of transactions to retain in edits files. Since many underlying file systems put a cap on the number of entries in a single directory, we should put a cap on the number of edits files which will be retained by the NN.