[HBASE-2467] Concurrent flushers in HLog sync using HDFS-895

• Type: Improvement
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Fix Version/s: 0.90.0
• Component/s: regionserver
• Labels: moved_from_0_20_5
• Hadoop Flags: Reviewed
• Assignee: Todd Lipcon
• Reporter: Todd Lipcon
• Created: 19/Apr/10 19:38
• Updated: 20/Nov/15 12:42
• Resolved: 06/Dec/10 21:00

Description

HDFS-895 changes hflush() to be able to run concurrently from multiple threads, where flushes can be concurrent with further writes to the same file.

We need to rip out/amend the group commit code a bit to take advantage of this.

Issue Links

• is blocked by: HDFS-895 Allow hflush/sync to occur in parallel with new writes to the file