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From Paulo Motta <>
Subject Re: Incremental repairs leading to unrepaired data
Date Tue, 09 Aug 2016 18:58:23 GMT
Anticompaction throttling can be done by setting the usual
compaction_throughput_mb_per_sec knob on cassandra.yaml or via nodetool
setcompactionthroughput. Did you try lowering that  and checking if that
improves the dropped mutations?

2016-08-09 13:32 GMT-03:00 Stefano Ortolani <>:

> Hi all,
> I am running incremental repaird on a weekly basis (can't do it every day
> as one single run takes 36 hours), and every time, I have at least one node
> dropping mutations as part of the process (this almost always during the
> anticompaction phase). Ironically this leads to a system where repairing
> makes data consistent at the cost of making some other data not consistent.
> Does anybody know why this is happening?
> My feeling is that this might be caused by anticompacting column families
> with really wide rows and with many SStables. If that is the case, any way
> I can throttle that?
> Thanks!
> Stefano

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