Forum Discussion

tanislavm's avatar
tanislavm
Level 6
11 years ago

master node

hi, I would like to know the master node role in vcs. Let`s say we configure an vcs with 2 node only and no resource.At this time one node is master node and the other is slave node? What about if we...
business continuity
Cluster Server
Solaris
  • mikebounds's avatar
    mikebounds
    11 years ago

    With Cluster Volume Manager (CVM) there is a master node - the master node is the only node that can create, modify and delete diskgroups and volumes.  In VCS there is no master, regardless of whether you have no service groups, or one or many service groups all one node node, or spread across the nodes - each node broadcasts out heartbeats and each node listens for heartbeats from the other nodes.  If you only have one node, then you don't have to have heartbeats and you configure VCS to start with "hastart -onenode" which means VCS does not require LLT and GAB.  You can still configure heartbeats with a one-node cluster if you plan to add another node later sometime in the future.

    Mike

mikebounds's avatar
mikebounds
Level 6
11 years ago

With Cluster Volume Manager (CVM) there is a master node - the master node is the only node that can create, modify and delete diskgroups and volumes.  In VCS there is no master, regardless of whether you have no service groups, or one or many service groups all one node node, or spread across the nodes - each node broadcasts out heartbeats and each node listens for heartbeats from the other nodes.  If you only have one node, then you don't have to have heartbeats and you configure VCS to start with "hastart -onenode" which means VCS does not require LLT and GAB.  You can still configure heartbeats with a one-node cluster if you plan to add another node later sometime in the future.

Mike