[HDFS-2782] HA: Support multiple shared edits dirs

• Type: New Feature
• Status: Resolved
• Priority: Major
• Resolution: Won't Fix
• Affects Version/s: 2.0.0-alpha
• Component/s: ha
• Assignee: Unassigned
• Reporter: Aaron Myers
• Created: 11/Jan/12 23:21
• Updated: 10/Mar/15 04:36
• Resolved: 31/Aug/12 04:03

Description

Supporting multiple shared dirs will improve availability (eg see HDFS-2769). You may want to use multiple shared dirs on a single filer (eg for better fault isolation) or because you want to use multiple filers/mounts. Per HDFS-2752 (and HDFS-2735) we need to do things like use the JournalSet in EditLogTailer and add tests.

Issue Links

• blocks: HDFS-2902 HA: Allow new (shared) edits log dir to be configured while NN is running