IBM PureData System for Analytics, Version 7.1

Daemon modes

The System Health Check daemon can run in two different modes, depending on how you want to use it.

Diagnostic

The System Health Check daemon by default runs in this mode. In this mode, system data is collected only after you run the nzhealthcheck command and then the rules are evaluated using this data. The advantage of the diagnostic mode is that it produces no background workload because it does not collect any data in the background.

You can run nzhealthcheck -I at any time to check in which of the modes the daemon is running:

nzhealthcheck -I
Daemon status: active
Daemon mode: diagnostic

To switch back from the monitoring to the diagnostic mode, run nzhealthcheck -D.

Monitoring

Run the nzhealthcheck -M command to restart the daemon and switch it to the monitoring mode. In this mode, data is constantly gathered in the background and the rules are evaluated periodically.

When the daemon runs in the monitoring mode, it only evaluates the automatic rules. Refer to the rules-doc.pdf document for information about which of the rules are evaluated automatically and which are evaluated manually.

Note: When you run the nzhealthcheck command, both the automatic and manual rules are processed, regardless of the mode in which the daemon runs.

The monitoring mode allows for enabling automatic notifications. See Enabling automatic notifications.

Some rules are automatically integrated with the callhome service when the daemon runs in this mode. See Integration with the callhome service.

You can run nzhealthcheck -I at any time to check in which of the modes the daemon is running:

nzhealthcheck -I
Daemon status: active
Daemon mode: monitoring