Wednesday, March 5, 2014

Cluster Health Monitor

Cluster Health Monitor (CHM)
  • CHM stores O/S metrics in the CHM repository that can be used for troubleshooting cluster issues.
  • CHM consists of the following services:
    • osysmond: System Monitor Service, one per node
    • ologgerd: Cluster Logger Service, one primary and one standby per cluster
  • If the master cluster logger service fails, the node where the standby resides:
    • Takes over as master
    • Selects a new node for standby
  • The repository resides within the Grid Infrastructure home and requires 1 GB of disk space per node.
  • The CHM repository is managed using the oclumon utility.


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