On Tue, Jul 5, 2011 at 1:27 PM, Raj N <raj.cassan...@gmail.com> 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.
