[jira] [Created] (HBASE-14326) HBase book: fix definition of max min size to compact

["Vladimir Rodionov (JIRA)" <ji...@apache.org>]

Vladimir Rodionov created HBASE-14326:
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             Summary: HBase book: fix definition of max min size to compact
                 Key: HBASE-14326
                 URL: https://issues.apache.org/jira/browse/HBASE-14326
             Project: HBase
          Issue Type: Bug
          Components: documentation
            Reporter: Vladimir Rodionov
             Fix For: 2.0.0


I think we need to change wording/definition of these config parameters in HBase book, they are misleading:
{quote}
hbase.hstore.compaction.min.size
Description
A StoreFile smaller than this size will always be eligible for minor compaction. HFiles this size or larger are evaluated by hbase.hstore.compaction.ratio to determine if they are eligible. Because this limit represents the "automatic include"limit for all StoreFiles smaller than this value, this value may need to be reduced in write-heavy environments where many StoreFiles in the 1-2 MB range are being flushed, because every StoreFile will be targeted for compaction and the resulting StoreFiles may still be under the minimum size and require further compaction. If this parameter is lowered, the ratio check is triggered more quickly. This addressed some issues seen in earlier versions of HBase but changing this parameter is no longer necessary in most situations. Default: 128 MB expressed in bytes.
Default
134217728
hbase.hstore.compaction.max.size
Description
A StoreFile larger than this size will be excluded from compaction. The effect of raising hbase.hstore.compaction.max.size is fewer, larger StoreFiles that do not get compacted often. If you feel that compaction is happening too often without much benefit, you can try raising this value. Default: the value of LONG.MAX_VALUE, expressed in bytes.
{quote}

For details, see HBASE-14263.



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