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https://issues.apache.org/jira/browse/HBASE-1513?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12719122#action_12719122
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Billy Pearson commented on HBASE-1513:
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testing minor compaction
is major compaction going to be at the speed I seen above?
if so we still going to have major problems when you start talking about 256mb
regions
256*1024/25kb/sec = 2.9 hours per region
that means running only major compactions we will only be able to major compact
8 regions a day not good for someone with 100 or so regions per server.
Billy
> Compactions to slow
> -------------------
>
> Key: HBASE-1513
> URL: https://issues.apache.org/jira/browse/HBASE-1513
> Project: Hadoop HBase
> Issue Type: Bug
> Components: regionserver
> Affects Versions: 0.20.0
> Reporter: Billy Pearson
> Assignee: ryan rawson
> Priority: Blocker
> Fix For: 0.20.0
>
> Attachments: HBASE-1513.patch
>
>
> know there was some changes to compaction a few days back I just got back
> to where I could run imports with the new client api
> and noticing that compactions are vary slow I meand 100x+ slower then they
> used to be I thought one of the servers compaction thread had died
> but after retesting and ruleing that out.
> I tested with and without compression and with and with out
> blockcache and all are running about the same
> I got one small compaction to complete it took 1977 secs to compact 48.56MB
> thats about 25kb sec
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