[HBASE-7216] sync hlog writer just after create it, so trigger addBlock and establish write pipeline before the first hlog sync

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Duplicate

Release Note

Resolving as dup of HBASE-10010. This patch seems to have gone stale also. I only see SequenceFileLogWriter out in hbase-server/src/test/main now.

• Assignee: Unassigned
• Reporter: Lijin Bin
• Created: 26/Nov/12 04:52
• Updated: 15/Jun/22 17:28
• Resolved: 09/Dec/13 00:43

Description

Current when hlog rollWriter:
(1)createWriter will call ClientProtocol.create
(2)first hlog sync will trigger ClientProtocol.addBlock and establish write pipeline
we can sync the outputstream to force trigger ClientProtocol.addBlock and establish write pipeline before the first hlog sync

Issue Links

• relates to: HBASE-1394 Uploads sometimes fall to 0 requests/second (Binding up on HLog#append?)
• relates to: HBASE-10010 eliminate the put latency spike on the new log file beginning