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:
These applications may include: backup utilities, webcrawlers, search engines, and replication programs.
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.