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Posted to dev@hbase.apache.org by "stack (JIRA)" <ji...@apache.org> on 2009/01/05 23:31:44 UTC
[jira] Commented: (HBASE-1083) Will keep scheduling major
compactions if last time one ran, we didn't.
[ https://issues.apache.org/jira/browse/HBASE-1083?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12660960#action_12660960 ]
stack commented on HBASE-1083:
------------------------------
I'm going to apply above patch. Here is how it looks now for an individual region 335809914:
{code}
trunk/logs/hbase-stack-regionserver-aa0-000-13.u.powerset.com.log:2009-01-05 19:34:46,721 [regionserver/0:0:0:0:0:0:0:0:60020.worker] DEBUG org.apache.hadoop.hbase.regionserver.HRegion: Opening region TestTable,0004338266,1231183799438/335809914
trunk/logs/hbase-stack-regionserver-aa0-000-13.u.powerset.com.log:2009-01-05 19:34:46,770 [regionserver/0:0:0:0:0:0:0:0:60020.worker] DEBUG org.apache.hadoop.hbase.regionserver.HStore: loaded /hbasetrunk2/TestTable/335809914/info/info/680545570196928204, isReference=false, sequence id=2548117, length=145155802, majorCompaction=false
trunk/logs/hbase-stack-regionserver-aa0-000-13.u.powerset.com.log:2009-01-05 19:34:46,772 [regionserver/0:0:0:0:0:0:0:0:60020.worker] DEBUG org.apache.hadoop.hbase.regionserver.HStore: Loaded 1 file(s) in hstore 335809914/info, max sequence id 2548117
trunk/logs/hbase-stack-regionserver-aa0-000-13.u.powerset.com.log:2009-01-05 19:34:46,797 [regionserver/0:0:0:0:0:0:0:0:60020.worker] INFO org.apache.hadoop.hbase.regionserver.HRegion: region TestTable,0004338266,1231183799438/335809914 available
trunk/logs/hbase-stack-regionserver-aa0-000-13.u.powerset.com.log:2009-01-05 19:34:46,797 [regionserver/0:0:0:0:0:0:0:0:60020.worker] DEBUG org.apache.hadoop.hbase.regionserver.CompactSplitThread: Compaction requested for region TestTable,0004338266,1231183799438/335809914 because: Region open check
trunk/logs/hbase-stack-regionserver-aa0-000-13.u.powerset.com.log:2009-01-05 20:11:32,815 [regionserver/0:0:0:0:0:0:0:0:60020.majorCompactionChecker] DEBUG org.apache.hadoop.hbase.regionserver.HStore: Major compaction triggered on store 335809914/info; time since last major compaction 2486624ms
trunk/logs/hbase-stack-regionserver-aa0-000-13.u.powerset.com.log:2009-01-05 20:11:32,815 [regionserver/0:0:0:0:0:0:0:0:60020.majorCompactionChecker] DEBUG org.apache.hadoop.hbase.regionserver.CompactSplitThread: Compaction requested for region TestTable,0004338266,1231183799438/335809914 because: regionserver/0:0:0:0:0:0:0:0:60020.majorCompactionChecker requests major compaction
trunk/logs/hbase-stack-regionserver-aa0-000-13.u.powerset.com.log:2009-01-05 20:11:39,546 [regionserver/0:0:0:0:0:0:0:0:60020.compactor] DEBUG org.apache.hadoop.hbase.regionserver.HStore: Major compaction triggered on store 335809914/info; time since last major compaction 2493355ms
trunk/logs/hbase-stack-regionserver-aa0-000-13.u.powerset.com.log:2009-01-05 20:11:39,729 [regionserver/0:0:0:0:0:0:0:0:60020.compactor] DEBUG org.apache.hadoop.hbase.regionserver.HStore: Started compaction of 1 file(s) into /hbasetrunk2/TestTable/compaction.dir/335809914/info/mapfiles/3632008531127598620
trunk/logs/hbase-stack-regionserver-aa0-000-13.u.powerset.com.log:2009-01-05 20:12:23,329 [regionserver/0:0:0:0:0:0:0:0:60020.compactor] DEBUG org.apache.hadoop.hbase.regionserver.HStore: moving /hbasetrunk2/TestTable/compaction.dir/335809914/info/mapfiles/3632008531127598620 to /hbasetrunk2/TestTable/335809914/info/mapfiles/7200075435675545045
trunk/logs/hbase-stack-regionserver-aa0-000-13.u.powerset.com.log:2009-01-05 20:12:23,366 [regionserver/0:0:0:0:0:0:0:0:60020.compactor] DEBUG org.apache.hadoop.hbase.regionserver.HStore: Completed major compaction of 335809914/info store size is 138.4m
trunk/logs/hbase-stack-regionserver-aa0-000-13.u.powerset.com.log:2009-01-05 20:44:52,844 [regionserver/0:0:0:0:0:0:0:0:60020.majorCompactionChecker] DEBUG org.apache.hadoop.hbase.regionserver.HStore: Skipping major compaction of 335809914/info because one (major) compacted file only and elapsedTime 1993205ms is < ttl=-1
trunk/logs/hbase-stack-regionserver-aa0-000-13.u.powerset.com.log:2009-01-05 21:01:32,844 [regionserver/0:0:0:0:0:0:0:0:60020.majorCompactionChecker] DEBUG org.apache.hadoop.hbase.regionserver.HStore: Skipping major compaction of 335809914/info because one (major) compacted file only and elapsedTime 2993205ms is < ttl=-1
trunk/logs/hbase-stack-regionserver-aa0-000-13.u.powerset.com.log:2009-01-05 21:18:12,844 [regionserver/0:0:0:0:0:0:0:0:60020.majorCompactionChecker] DEBUG org.apache.hadoop.hbase.regionserver.HStore: Skipping major compaction of 335809914/info because one (major) compacted file only and elapsedTime 3993205ms is < ttl=-1
trunk/logs/hbase-stack-regionserver-aa0-000-13.u.powerset.com.log:2009-01-05 21:34:52,854 [regionserver/0:0:0:0:0:0:0:0:60020.majorCompactionChecker] DEBUG org.apache.hadoop.hbase.regionserver.HStore: Skipping major compaction of 335809914/info because one (major) compacted file only and elapsedTime 4993215ms is < ttl=-1
trunk/logs/hbase-stack-regionserver-aa0-000-13.u.powerset.com.log:2009-01-05 21:51:32,864 [regionserver/0:0:0:0:0:0:0:0:60020.majorCompactionChecker] DEBUG org.apache.hadoop.hbase.regionserver.HStore: Skipping major compaction of 335809914/info because one (major) compacted file only and elapsedTime 5993225ms is < ttl=-1
trunk/logs/hbase-stack-regionserver-aa0-000-13.u.powerset.com.log:2009-01-05 22:08:12,884 [regionserver/0:0:0:0:0:0:0:0:60020.majorCompactionChecker] DEBUG org.apache.hadoop.hbase.regionserver.HStore: Skipping major compaction of 335809914/info because one (major) compacted file only and elapsedTime 6993245ms is < ttl=-1
trunk/logs/hbase-stack-regionserver-aa0-000-13.u.powerset.com.log:2009-01-05 22:24:52,894 [regionserver/0:0:0:0:0:0:0:0:60020.majorCompactionChecker] DEBUG org.apache.hadoop.hbase.regionserver.HStore: Skipping major compaction of 335809914/info because one (major) compacted file only and elapsedTime 7993255ms is < ttl=-1
{code}
Main difference is that we don't schedule a major compaction every time through and then when we go to run it, find that its not needed after all. Instead, as in above, each major compaction interval, we check and will not run a major if last one was result of a major.
> Will keep scheduling major compactions if last time one ran, we didn't.
> -----------------------------------------------------------------------
>
> Key: HBASE-1083
> URL: https://issues.apache.org/jira/browse/HBASE-1083
> Project: Hadoop HBase
> Issue Type: Bug
> Reporter: stack
> Assignee: stack
> Fix For: 0.19.0
>
> Attachments: 1083.patch
>
>
> Excerpt below has major compactions scheduled ever few hours but nothing to compact each time through -- last run was a major compaction -- and times are off. Need to touch files if nothing to compact so major doesn't get scheduled again.
> {code}
> 2008-12-20 02:41:03,933 DEBUG org.apache.hadoop.hbase.regionserver.HStore: Major compaction triggered on store: 170018656/content. Time since last major compaction: 249999 seconds
> 2008-12-20 05:27:43,933 DEBUG org.apache.hadoop.hbase.regionserver.HStore: Major compaction triggered on store: 170018656/content. Time since last major compaction: 259999 seconds
> 2008-12-20 08:14:23,932 DEBUG org.apache.hadoop.hbase.regionserver.HStore: Major compaction triggered on store: 170018656/content. Time since last major compaction: 269999 seconds
> 2008-12-20 11:01:03,932 DEBUG org.apache.hadoop.hbase.regionserver.HStore: Major compaction triggered on store: 170018656/content. Time since last major compaction: 279999 seconds
> 2008-12-20 13:47:43,932 DEBUG org.apache.hadoop.hbase.regionserver.HStore: Major compaction triggered on store: 170018656/content. Time since last major compaction: 289999 seconds
> 2008-12-20 16:34:23,932 DEBUG org.apache.hadoop.hbase.regionserver.HStore: Major compaction triggered on store: 170018656/content. Time since last major compaction: 299999 seconds
> 2008-12-20 19:21:03,933 DEBUG org.apache.hadoop.hbase.regionserver.HStore: Major compaction triggered on store: 170018656/content. Time since last major compaction: 309999 seconds
> 2008-12-20 22:07:43,932 DEBUG org.apache.hadoop.hbase.regionserver.HStore: Major compaction triggered on store: 170018656/content. Time since last major compaction: 319999 seconds
> {code}
> Then it says:
> {code}
> 2008-12-20 13:47:43,935 DEBUG org.apache.hadoop.hbase.regionserver.HStore: Skipping major compaction because only one (major) compacted file only and elapsedTime 289999825 is < ttl=-1
> {code}
> I think whats happening is that we're not compacting because we just did but major compactions keep getting triggered because we are not updating the file timestamp. Look into it. At least fix up logging so its clearer whats happening.. Here is snippet:
> {code}
> 2008-12-20 11:01:04,026 DEBUG org.apache.hadoop.hbase.regionserver.HStore: Skipping major compaction because only one (major) compacted file only and elapsedTime 149999850 is < ttl=-1
> 2008-12-20 11:01:04,026 INFO org.apache.hadoop.hbase.regionserver.HRegion: compaction completed on region assigners,,1229364037757 in 0sec
> 2008-12-20 13:47:43,932 DEBUG org.apache.hadoop.hbase.regionserver.HStore: Major compaction triggered on store: 170018656/content. Time since last major compaction: 289999 seconds
> 2008-12-20 13:47:43,932 DEBUG org.apache.hadoop.hbase.regionserver.CompactSplitThread: Compaction requested for region streamitems,^@^@^@^@^C�r�,1229427582771 because: regionserver/0:0:0:0:0:0:0:0:60020.majorCompactionChecker requests major compaction
> 2008-12-20 13:47:43,932 INFO org.apache.hadoop.hbase.regionserver.HRegion: starting compaction on region streamitems,^@^@^@^@^C�r�,1229427582771
> 2008-12-20 13:47:43,934 DEBUG org.apache.hadoop.hbase.regionserver.HStore: Major compaction triggered on store: 65151897/content. Time since last major compaction: 259999 seconds
> 2008-12-20 13:47:43,934 DEBUG org.apache.hadoop.hbase.regionserver.CompactSplitThread: Compaction requested for region streamitems,^@^@^@^@^C3=�,1229459727659 because: regionserver/0:0:0:0:0:0:0:0:60020.majorCompactionChecker requests major compaction
> 2008-12-20 13:47:43,935 DEBUG org.apache.hadoop.hbase.regionserver.HStore: Major compaction triggered on store: 1579534353/content. Time since last major compaction: 259983 seconds
> 2008-12-20 13:47:43,935 DEBUG org.apache.hadoop.hbase.regionserver.CompactSplitThread: Compaction requested for region streamitems,^@^@^@^@^AV^Ds,1229459695202 because: regionserver/0:0:0:0:0:0:0:0:60020.majorCompactionChecker requests major compaction
> 2008-12-20 13:47:43,935 DEBUG org.apache.hadoop.hbase.regionserver.HStore: Skipping major compaction because only one (major) compacted file only and elapsedTime 289999825 is < ttl=-1
> 2008-12-20 13:47:43,936 DEBUG org.apache.hadoop.hbase.regionserver.HStore: Major compaction triggered on store: 1277711984/content. Time since last major compaction: 339999 seconds
> ...
> {code}
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