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https://issues.apache.org/jira/browse/HBASE-8155?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13607954#comment-13607954
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stack commented on HBASE-8155:
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[~nspiegelberg] SF compresses by the block. A block may be made of many
entries. Enabling compression means we could lose more data -- up to a whole
block rather than just the last entry -- if we fail just as we are about to
round out the block (or we've written a complete block and the compressor is
still working on flushing it out). Is your thinking this is ok as long as the
configuration carries sufficient warnings? Thanks.
> Allow Record Compression for HLogs
> ----------------------------------
>
> Key: HBASE-8155
> URL: https://issues.apache.org/jira/browse/HBASE-8155
> Project: HBase
> Issue Type: New Feature
> Components: regionserver, wal
> Reporter: Nicolas Spiegelberg
> Priority: Trivial
>
> While HBASE-4608 allows for Key-intelligent log compression & custom
> extensions, Hadoop already allows for native compression support with
> SequenceFile. We should allow the user to enable this functionality through
> the config. Besides backwards compatibility & existing stabilized code,
> allowing users to enable record-level WAL support will allow support value
> compression.
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