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
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.
On 25/11/13 15:12, Julien Campan wrote:
I would like to know, why we can't perform a
lot of cleanup in a same time ?
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"