Compaction needs little better skip algo
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Key: HBASE-812
URL: https://issues.apache.org/jira/browse/HBASE-812
Project: Hadoop HBase
Issue Type: Bug
Components: regionserver
Affects Versions: 0.2.0, 0.3.0
Reporter: Billy Pearson
Priority: Trivial
Fix For: 0.2.1, 0.3.0
Looking at this section of one of my compaction's we have 3 files to compact
the new algo is working great in my test but I see this below often we are
skipping 2 out of the 3 files and compacting 1 file. 1 file is kind of a wast
might as well just copy the file my suggestion is if there is only 1 file left
after the new algo skips then just go on to the next column and skip the last
file also. This will help improve compaction times a little more.
{code}
2008-08-10 10:00:45,310 DEBUG org.apache.hadoop.hbase.regionserver.HStore:
Compaction size of 1339600874/size: 4.6m, skipped 2, 4851776
2008-08-10 10:00:45,438 DEBUG org.apache.hadoop.hbase.regionserver.HStore:
started compaction of 1 files into
/hbase/webdata/compaction.dir/1339600874/size/mapfiles/8653208152776334891
2008-08-10 10:00:46,838 DEBUG org.apache.hadoop.hbase.regionserver.HStore:
moving
/hbase/webdata/compaction.dir/1339600874/size/mapfiles/8653208152776334891 to
/hbase/webdata/1339600874/size/mapfiles/7539342470259528578
2008-08-10 10:00:47,166 DEBUG org.apache.hadoop.hbase.regionserver.HStore:
Completed compaction of 1339600874/size store size is 4.6m
{code}
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