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From Raj N <>
Subject Re: nodetool repair question
Date Tue, 05 Jul 2011 18:39:19 GMT
I know it doesn't. But is this a valid enhancement request?

On Tue, Jul 5, 2011 at 1:32 PM, Edward Capriolo <>wrote:

> On Tue, Jul 5, 2011 at 1:27 PM, Raj N <> wrote:
>> Hi experts,
>>      Are there any benchmarks that quantify how long nodetool repair
>> takes? Something which says on this kind of hardware, with this much of
>> data, nodetool repair takes this long. The other question that I have is
>> since Cassandra recommends running nodetool repair within
>> GCGracePeriodSeconds, is it possible to introduce a setting in
>> cassandra.yaml, that allows you to specify the frequency of nodetool repair
>> so that Cassandra can itself determine when to run nodetool repair instead
>> of setting up a cron job. Since Cassandra knows about all its peers, it can
>> be smart enough to also decide which nodes can run repair concurrently. For
>> example, if RF =3, and I have 6 nodes, then 2 replicas which are responsible
>> for different ranges in the ring can run repair concurrently.
>> Thanks
>> -Raj
> Currently Cassandra does not run repair automatically. You can use cron and
> 'nodetool repair' as a simple approach.

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