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From Jonathan Colby <>
Subject Re: How to determine if repair need to be run
Date Thu, 31 Mar 2011 15:16:08 GMT
silly question, would every cassandra installation need to have manual repairs done on it?

It would seem cassandra's "read repair" and regular compaction would take care of keeping
the data clean. 

Am I missing something?

On Mar 30, 2011, at 7:46 PM, Peter Schuller wrote:

>> I just wanted to chime in here and say some people NEVER run repair.
> Just so long as the OP is understanding that this implies taking an
> explicit decision to accept the "misbehavior" you will see as a
> result. I.e., the reason people survive not doing repairs in some
> cases is, as in your case, that they can actually live with the
> consequences such as old data "magically" re-appearing permanently.
>> as it really increased on disk data. I have followed some threads and
>> there are some conditions that I read repair can't handle. The
> For one thing, RR will only touch data that is read. And not even all
> data that is read at that (e.g. range slices don't imply repair).
> -- 
> / Peter Schuller

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