We plan to do it during non-peak hours when customer traffic is less. That sums up to 10 nodes a day, which is concerning as we have other data centers to be expanded eventually.
Since cleanup is similar to compaction, which is CPU intensive and will effect reads if this data center were to serve traffic. Is running cleanup in parallel advisable?? On Thu, Oct 8, 2015, 17:53 Jonathan Haddad <j...@jonhaddad.com> wrote: > Unless you're close to running out of disk space, what's the harm in it > taking a while? How big is your DC? At 45 min per node, you can do 32 > nodes a day. Diverting traffic away from a DC just to run cleanup feels > like overkill to me. > > > > On Thu, Oct 8, 2015 at 2:39 PM sai krishnam raju potturi < > pskraj...@gmail.com> wrote: > >> hi; >> our cassandra cluster currently uses DSE 4.6. The underlying cassandra >> version is 2.0.14. >> >> We are planning on adding multiple nodes to one of our datacenters. This >> requires "nodetool cleanup". The "nodetool cleanup" operation takes >> around 45 mins for each node. >> >> Datastax documentation recommends running "nodetool cleanup" for one >> node at a time. That would be really long, owing to the size of our >> datacenter. >> >> If we were to divert the read and write traffic away from a particular >> datacenter, could we run "cleanup" on multiple nodes in parallel for >> that datacenter?? >> >> >> http://docs.datastax.com/en/cassandra/2.0/cassandra/operations/ops_add_node_to_cluster_t.html >> >> >> thanks >> Sai >> >
