Veritas™ File System 5.0.1 Programmer's Reference Guide

File Change Log

This chapter includes the following topics:

■ About the File Change Log file

■ Record types

■ File Change Log tunables

■ Application programming interface for File Change Log

■ Reverse path name lookup

About the File Change Log file

The VxFS File Change Log (FCL) tracks changes to files and directories in a file

system.

Applications that typically use the FCL are usually required to perform the

following:

■ Scan an entire file system or a subset

■ Discover changes since the last scan

These applications may include: backup utilities, webcrawlers, search engines,

and replication programs.

Note: The FCL tracks when the data has changed and records the change type,

but does not track the actual data changes. It is the responsibility of the application

to examine the files to determine the changed data.

Recorded changes

The File Change Log records the following file system changes:

Chapter