System Setup › Saving the Logger Data › The IBM System Logger

The IBM System Logger

To define a Log Stream, the IBM System Logger must be active. It is beyond the scope of this document to instruct you on setting up the IBM System Logger facility. The IBM manual MVS Setting up a Sysplex provides all the necessary information required to setup the System Logger facility.

This document assumes that:

• A System Logger is active in a SYSPLEX (MONO, LOCAL, or Full SYSPLEX).
• The IXGLOGR started task is active.
• Logger policies have been defined.

If these requirements are not met, the Internal Logger will write until the Logger dataspace is full, reset to the start, and overwrite the dataspace. The amount of logging data available will be limited to the size of the Logger dataspace. The size of the Logger dataspace is controlled by the LogDataspaceSize attribute in the Parmlib Startup Options Section.

To determine if the IBM System Logger is active, issue the IBM D LOGGER console command. An active logger will display as follows:

IXG601I   09.36.12  LOGGER DISPLAY
SYSTEM LOGGER STATUS              
 SYSTEM   SYSTEM LOGGER STATUS    
 ------   --------------------    
 XE61     ACTIVE