Forum Discussion

linuly's avatar
linuly
Level 4
5 years ago

cluster

hi,

in every node of vcs the in-memory contain the information loaded from main.cf and the information related to what service is up on what node.right?

when a service is brought up on a node then this information from memory is copied to the other nodes.right?

  • Please see my comments in line below beginning with "<<<"

    in every node of vcs the in-memory contain the information loaded from main.cf and the information related to what service is up on what node.right?

    <<< only the first node (where had is up first) gets initial cluster configuration from the on disk main.cf,  cluser resources states and cluster configuration can change from time to time online.  GAB is responsible for keeping up this info on each node's had running in kernel updated

    when a service is brought up on a node then this information from memory is copied to the other nodes.right?

    <<< correct (do not norammly use the word copy).  this is what GAB prot h for - communicates the status of resources running on each system to all systems in the cluster.

  • Please see my comments in line below beginning with "<<<"

    in every node of vcs the in-memory contain the information loaded from main.cf and the information related to what service is up on what node.right?

    <<< only the first node (where had is up first) gets initial cluster configuration from the on disk main.cf,  cluser resources states and cluster configuration can change from time to time online.  GAB is responsible for keeping up this info on each node's had running in kernel updated

    when a service is brought up on a node then this information from memory is copied to the other nodes.right?

    <<< correct (do not norammly use the word copy).  this is what GAB prot h for - communicates the status of resources running on each system to all systems in the cluster.

    • linuly's avatar
      linuly
      Level 4

      hi,

      first the cluster is started then the services are brought online.right?