[jira] [Commented] (CASSANDRA-10805) Additional Compaction Logging

["Carl Yeksigian (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-10805?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15081762#comment-15081762 ] 

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

* I was initially using logback, but changed because I was getting incomplete files (since I didn't know when a new file was created). Looking at the [logback docs|http://logback.qos.ch/manual/appenders.html#RollingFileAppender] it seems like I probably just need to implement these two classes to make sure the logs are complete
* That will work well; I'll make sure the logger has the name of the table it is assigned to in order to capture just the output from one table
* Good point; this could also simplify some of the multiple-line events

> 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
>
> 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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