2.6.5 Checking whether NNMi cooperation is possible
The NNMi cooperation function is available when NNMi has detected the servers monitored by SSO. Servers detected by NNMi here means servers recognized by NNMi as nodes, regardless of whether the servers are managed by NNMi.
SSO periodically checks whether cooperation with NNMi is possible, based on the NNMi cooperation related settings in the ssospmd action definition file. This check can also be initiated by any daemon process linked with NNMi. Any detected change in the linkability with NNMi can be used as a trigger to, for example, start or stop the relevant daemon process, or change the operation mode of the daemon process to normal or reduced mode. However, a change in the linkability with the NNMi set in the event destination definition file (ssodest.conf) is not used as a trigger.
- Organization of this subsection
(1) Timing for checking linkability with NNMi
ssospmd checks the linkability with NNMi at the following timings:
-
At the interval set for nnm-coop-check-interval in the ssospmd action definition file
-
When a process that uses cooperation with NNMi (ssoapmon or ssocolmng) detects before ssospmd that cooperation with NNMi is unavailable
(2) Operation when change in linkability is detected
Upon detection of a change in the linkability with NNMi, ssospmd operates as described below according to the nnm-coop-policy setting in the ssospmd action definition file.
(a) When a change from linkable to unlinkable is detected
- If nnm-coop-policy is 0:
-
ssospmd stops all daemon processes except ssospmd, and sets the state of the stopped daemon processes to SUSPENDING.
- If nnm-coop-policy is 1:
-
ssospmd changes the operation mode of the ssoapmon and ssocolmng daemon processes to reduced mode, and sets the state of these daemon processes to DEGENERATING.
(b) When a change from unlinkable to linkable is detected
- If nnm-coop-policy is 0:
-
ssospmd starts the daemon processes that are in the SUSPENDING state.
- If nnm-coop-policy is 1:
-
ssospmd changes the operation mode of the daemon processes that are in the DEGENERATING state to normal mode.