how things work

[linuly]

every node in vcs has in-memory information about cluster.when we issue any command line -hasys so on-the command interract with the vcs on local node and this will retrieve the requested information from in-memory.right?

[RiaanBadenhorst · Accepted solution]

Yes, when you start the cluster first node load the configuration from main.cf into memory. Any nodes that start after that, get the configuration from the 1st node that started. The cluster use Global Atomic Broadcast (GAB) to distribute the original config updates, and any state change to all the nodes.