Configuring logging

Learn how to configure logging for various Ceph subsystems.

Important: Logging is resource-intensive. Also, verbose logging can generate a huge amount of data in a relatively short time. If you are encountering problems in a specific subsystem of the cluster, enable logging only of that subsystem. For more information, see Ceph subsystems.

Consider also setting up a rotation of log files. For more information, see Accelerating log rotation.

Once you fix any problems you encounter, change the subsystems log and memory levels to their default values. For a list of all Ceph subsystems and their default values, see Ceph subsystems default logging level values.

You can configure Ceph logging by:

Using the ceph command at runtime. This is the most common approach. For more information, see Configuring logging at runtime.
Updating the Ceph configuration file. Use this approach if you are encountering problems when starting the cluster. For more information, see Configuring logging in configuration file.

Note: When configuring logging, be sure to have a running IBM Storage Ceph cluster.