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https://issues.apache.org/jira/browse/HBASE-5262?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13191692#comment-13191692
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Todd Lipcon commented on HBASE-5262:
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I have some preference against JSON -- IMO JSON isn't "strict" enough, so
people tend to break the format over time without a centralized schema
definition to remind them that this is a real interface. I would be happier to
see either avro or protobuf used. But definitely +1 for something that's
consumable by non-Java programs and won't need to be actively upgraded when we
add or remove fields.
> Structured event log for HBase for monitoring and auto-tuning performance
> -------------------------------------------------------------------------
>
> Key: HBASE-5262
> URL: https://issues.apache.org/jira/browse/HBASE-5262
> Project: HBase
> Issue Type: Improvement
> Reporter: Mikhail Bautin
>
> Creating this JIRA to open a discussion about a structured (machine-readable)
> log that will record events such as compaction start/end times, compaction
> input/output files, their sizes, the same for flushes, etc. This can be
> stored e.g. in a new system table in HBase itself. The data from this log can
> then be analyzed and used to optimize compactions at run time, or otherwise
> auto-tune HBase configuration to reduce the number of knobs the user has to
> configure.
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