[HDFS-2291] HA: Checkpointing in an HA setup

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: HA branch (HDFS-1623)
• Fix Version/s: HA branch (HDFS-1623)
• Component/s: ha, namenode
• Target Version/s: HA branch (HDFS-1623)
• Hadoop Flags: Reviewed
• Assignee: Todd Lipcon
• Reporter: Aaron T. Myers
• Created: 26/Aug/11 21:39
• Updated: 05/Jan/12 14:25
• Resolved: 05/Jan/12 00:23

Description

We obviously need to create checkpoints when HA is enabled. One thought is to use a third, dedicated checkpointing node in addition to the active and standby nodes. Another option would be to make the standby capable of also performing the function of checkpointing.

Issue Links

• is blocked by: HDFS-2716 HA: Configuration needs to allow different dfs.http.addresses for each HA NN
• is related to: HDFS-1973 HA: HDFS clients must handle namenode failover and switch over to the new active namenode.