Hi Jean, Running nodetool repair on a node will repair only that node in the cluster. It is recommended to run nodetool repair on one node at a time.
Few things to keep in mind while running repair 1. Running repair will trigger compactions 2. Increase in CPU utilization. Run node tool repair with -pr option, so that it will repair only the range that node is responsible for. On Thu, Jun 18, 2015 at 10:50 PM, Jean Tremblay < jean.tremb...@zen-innovations.com> wrote: > Thanks Jonathan. > > But I need to know the following: > > If you issue a “nodetool repair” on one node will it repair all the > nodes in the cluster or only the one on which we issue the command? > > If it repairs only one node, do I have to wait that the nodetool > repair ends, and only then issue another “nodetool repair” on the next node? > > Kind regards > > On 18 Jun 2015, at 19:19 , Jonathan Haddad <j...@jonhaddad.com> wrote: > > If you're using DSE, you can schedule it automatically using the repair > service. If you're open source, check out Spotify cassandra reaper, it'll > manage it for you. > > https://github.com/spotify/cassandra-reaper > > > > On Thu, Jun 18, 2015 at 12:36 PM Jean Tremblay < > jean.tremb...@zen-innovations.com> wrote: > >> Hi, >> >> I want to make on a regular base repairs on my cluster as suggested by >> the documentation. >> I want to do this in a way that the cluster is still responding to read >> requests. >> So I understand that I should not use the -par switch for that as it will >> do the repair in parallel and consume all available resources. >> >> If you issue a “nodetool repair” on one node will it repair all the nodes >> in the cluster or only the one on which we issue the command? >> >> If it repairs only one node, do I have to wait that the nodetool repair >> ends, and only then issue another “nodetool repair” on the next node? >> >> If we had down time periods I would issue a nodetool -par, but we don’t >> have down time periods. >> >> Sorry for the stupid questions. >> Thanks for your help. > > > -- Arun Senior Hadoop/Cassandra Engineer Cloudwick 2014 Data Impact Award Winner (Cloudera) http://www.cloudera.com/content/cloudera/en/campaign/data-impact-awards.html
