You should use nodetool repair -pr on every node to make sure that each range
is repaired only once.
Thanks
Anuj Wadehra
Sent from Yahoo Mail on Android
From:"Brice Argenson" <bargen...@gmail.com>
Date:Sat, 23 May, 2015 at 12:31 am
Subject:Periodic Anti-Entropy repair
Hi everyone,
We are currently migrating from DSE to Apache Cassandra and we would like to
put in place an automatic and periodic nodetool repair execution to replace the
one executed by OpsCenter.
I wanted to create a script / service that would run something like that:
token_rings = `nodetool ring | awk '{print $8}’`
for(int i = 0; i < token_rings.length; i += 2) {
`nodetool repair -st token_rings[i] -et token_rings[i+1]`
}
That script / service would run every week (our GCGrace is 10 days) and would
repair all the ranges of the ring one by one.
I also looked a bit on Google and I found that script:
https://github.com/BrianGallew/cassandra_range_repair
It seems to do something equivalent but it also seems to run the repair node by
node instead of the complete ring.
From my understanding, that would mean that the script has to be run for every
node of the cluster and that all token ranges would be repair as many time as
the number of replicas containing it.
Is there something I misunderstand?
Which approach is better?
How do you handle your Periodic Anti-Entropy Repairs?
Thanks a lot!
