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From "Ihar Kukharchuk (JIRA)" <>
Subject [jira] [Issue Comment Deleted] (CASSANDRA-13745) Compaction History would be beneficial to include completion timestamp
Date Mon, 14 Aug 2017 16:35:00 GMT


Ihar Kukharchuk updated CASSANDRA-13745:
    Comment: was deleted

(was: Hi,
sorry for bothering, but do I need extra permissions to assign the issue to me [I have no
access to assign button for now]?
I've already submitted a kind of patch, but still have several questions because I'm new here
and may miss the spirit of C* development:
1. Do C* really need such functionality? [the question exists because provided solution changes
the schema of system.compaction_history table and there are several cases, when it is not
appropriate to do such things]
2. I assume, that "compaction_started_at" may be not a really good name, so should I think
about more conscious one? Or, maybe someone has the proper name for that column on the fly.
3. Current solution shows "unix start time" instead of compaction start time if it is not
present [via nodetool compactionhistory] - are you ok with such approach? Or is it better
to output a kind of special symbol, for example - "-"?
4. As far as I investigated, C* performs "force" update for system tables and I should not
think about any special upgrade utility for now providing such patch, am I right?
Thank you!)

> Compaction History would be beneficial to include completion timestamp 
> -----------------------------------------------------------------------
>                 Key: CASSANDRA-13745
>                 URL:
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Compaction, Core
>            Reporter: Richard Andersen
>            Priority: Minor
>              Labels: lhf
>         Attachments: 13745-trunk.txt
> Compaction history does not currently contain the completion time stamp which can be
beneficial in determining performance and event tracing. I would like to use this information
also in our Health Check process to trace event timelines. 

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