Introduction

The ZCOM subsystem provides a centralized message logging mechanism to allow the ACC software components to log runtime messages to text files. The different subsystems log messages to indicate their normal operations and the errors they encountered. Sometimes the messages may contain vital information for trouble-shooting runtime problems. The messages are first queued up in the kernel memory and are extracted by the zmlog utility, which will then log the messages in a readable text format (typically in /var/opt/acc/log/<day>.tlog), and optionally save them in binary files in case further processing is required. These messages may also be displayed on the system console. Refer to the ACC Utilities Reference Guide for complete details on zmlog and the message log files.

In addition to the logged messages, the ZCOM APIs (providing programmatic access to the ZCOM features) may also return ZCOM error codes and status codes to indicate the exception condition the system encountered while processing the API request. When appropriate, some log messages also include the ZCOM error/status codes for troubleshooting purposes.