Hi Julien,
I hope I get this right :)
a repair will trigger a mayor compaction on your node which will take up
a lot of CPU and IO performance. It needs to do this to build up the
data structure that is used for the repair. After the compaction this is
streamed to the different nodes in order to repair them.
If you trigger this on every node simultaneously you basically take the
performance away from your cluster. I would expect cassandra still to
function, just way slower then before. Triggering it node after node
will leave your cluster with more resources to handle incoming requests.
Cheers,
Artur
On 25/11/13 15:12, Julien Campan wrote:
Hi,
I'm working with Cassandra 1.2.2 and I have a question about nodetool
cleanup.
In the documentation , it's writted "Wait for cleanup to complete on
one node before doing the next"
I would like to know, why we can't perform a lot of cleanup in a same
time ?
Thanks
