Veritas™ File System 5.0.1 Programmer's Reference Guide

As the FCL file grows in size, depending on the file system tunables fcl_maxalloc

and fcl_keeptime, the oldest records at the start of the FCL file are thrown away

to free up some space, as the first offset gets updated. When the set of events

tracked in the FCL file is changed using the [set] or [clear] options of the fcladm

command, the event mask and the event mask change time are updated. An event

mask change also results in an event mask change record containing the old event

mask and the new event mask change being logged in the FCL file.

File Change Log record

The FCL records contain information about these typical changes:

■ The inode number of the file that has changed

See “Inodes” on page 48.

■ The time of change

■ The type of change

■ Optional information depending on the record type

Depending on the record type, the FCL record may also include the following

information:

■ A parent inode number

■ A filename for file deletes, links, and similar operations

■ A command name for a file open record

■ The actual statistics for an I/O statistics record

See Figure 2-1 on page 21.

Record types

Table 2-1 lists actions that generate FCL record types.

Table 2-1

FCL record types

Record typeAction to create an FCL record

VX_FCL_LINKAdd a link to an existing file or