Dex Chen wrote: > Thanks for the response. > > I figured out the cause. I used "cman_tool leave remove" when I shutdown > the other 2 nodes. In this way, the remaining one/cluster had "quorum: > 1, and expected vote 1". I was surprised that the "2 node cluster" > special case did not prevent this. 'cman_tool leave remove' is one of those "I know what I'm doing" commands. > My remaining question is: > Do you see any potential risks such as "split brain" when the stopped > nodes come back, especially in a more-node cluster (say 5 node cluster)? As soon as you add a node back in, it will impose its version of expected votes on the cluster and it will go inquorate again. once you have (in your example) 3 nodes in the cluster all will start working normally. -- Patrick Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SL4 ITE, UK. Registered in England and Wales under Company Registration No. 3798903 -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
