# Introduction

The logging, tracing, and auditing facilities in Substation ES record events that occur during Substation ES execution, mainly to provide users and administrators with a recording facility of accurate real-time information of events, audits, definitions, and statistics produced by Substation ES.

Although the events recorded are written to different output destinations, this guide refers to the logging, tracing, and auditing facilities collectively as LTA Agents, which are executed as sub-tasks within Substation ES.

## Log Agent

Information recorded by Log Agent is targeted for Substation ES users and administrators. Log entries provide information on Substation ES-executed events, console interactions, statistics, and messages, which can be informational messages, error messages, or warnings.

All the messages in the Log files are detailed in TIBCO Substation ES Messages and Codes. You can route the log information to a disk file.

## Trace Agent

Information recorded by the Trace Agent is targeted for TIBCO Support and development staff. The Trace file contains the same entries as the Log file with additional event detail, storage snaps, and function level tracing. None of the information written to the Trace Agent destination is expected to be documented or meaningful to users.

You can route the Trace information to a disk file.

## Audit Agent

Targeted for Substation ES users, security staff, and administrators, information recorded by the Audit Agent is on the following:

- Substation ES System Startup Parameters and System Initialization Parameters
- Access and security validations and violations that occur during Substation ES execution

All the messages in the Audit files are detailed in TIBCO Substation ES Messages and Codes. Currently, the Audit Agent is not yet fully implemented and you cannot route the Audit information to a disk file.

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