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From "Carl Yeksigian (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-10805) Additional Compaction Logging
Date Thu, 28 Apr 2016 20:18:13 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-10805?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15262904#comment-15262904
] 

Carl Yeksigian commented on CASSANDRA-10805:
--------------------------------------------

[~krummas] I reran the logall branch dtests, and they look much better now.

> Additional Compaction Logging
> -----------------------------
>
>                 Key: CASSANDRA-10805
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-10805
>             Project: Cassandra
>          Issue Type: New Feature
>          Components: Compaction, Observability
>            Reporter: Carl Yeksigian
>            Assignee: Carl Yeksigian
>            Priority: Minor
>             Fix For: 3.x
>
>
> Currently, viewing the results of past compactions requires parsing the log and looking
at the compaction history system table, which doesn't have information about, for example,
flushed sstables not previously compacted.
> This is a proposal to extend the information captured for compaction. Initially, this
would be done through a JMX call, but if it proves to be useful and not much overhead, it
might be a feature that could be enabled for the compaction strategy all the time.
> Initial log information would include:
> - The compaction strategy type controlling each column family
> - The set of sstables included in each compaction strategy
> - Information about flushes and compactions, including times and all involved sstables
> - Information about sstables, including generation, size, and tokens
> - Any additional metadata the strategy wishes to add to a compaction or an sstable, like
the level of an sstable or the type of compaction being performed



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