Selecting quorum nodes

To configure a system with efficient quorum nodes, follow these rules.

  • Select nodes that are likely to remain active
    • If a node is likely to be rebooted or require maintenance, do not select that node as a quorum node.
  • Select nodes that have different failure points such as:
    • Nodes that are located in different racks
    • Nodes that are connected to different power panels
  • You should select nodes that GPFS™ administrative and serving functions rely on such as:
    • Primary configuration servers
    • Secondary configuration servers
    • Network Shared Disk (NSD) servers
  • Select an odd number of nodes as quorum nodes
    • The suggested maximum is eight quorum nodes.
  • Having a large number of quorum nodes might increase the time required for startup and failure recovery.
    • Having more than seven quorum nodes does not guarantee higher availability.
    • All quorum nodes must have access to all of the tiebreaker disks.
Parent topic: Node failure