topic Cluster -> master node and peer node on same machine in Deployment Architecture

Cluster -> master node and peer node on same machine

jtworzydlo — Fri, 15 Mar 2013 12:36:02 GMT

I have 4 machines (RHEL) and wanted to make 2 clusters (2 peer nodes per cluster) of these.
But one thing made me very sad.
"Important: The master cannot do double duty as a peer node or a search head, and it cannot reside on the same machine as a peer node or search head."

Is this really true? How would these instances know of each other if I change the install directory?
has anyone tried this approach?

Re: Cluster -> master node and peer node on same machine

martin_mueller — Fri, 15 Mar 2013 13:13:20 GMT

Regardless of what may or may not be technically possible, putting more than one role of the cluster onto the same machine makes the system vulnerable to single points of failure. If for example a combined master/peer box goes down there is no master to redistribute the lost buckets.

Re: Cluster -> master node and peer node on same machine

mahamed_splunk — Wed, 20 Mar 2013 21:26:07 GMT

The main reason we recommend to run each component of clustering (master, peer, search head) on separate server is because we don't want the failure of one component affects the other and bring down the entire cluster.