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Recorded changes

The File Change Log records file system changes including:

The FCL stores changes in a sparse file, referred to as the FCL file, in the file system namespace. The FCL file is always located in /mount_point/lost+found/changelog. The FCL file behaves like a regular file, however, some user-level operations are prohibited, such as writes.


  Note   The standard system calls open(2), lseek(2), read(2) and close(2) can access the data in the FCL file. All other system calls such as mmap(2), unlink(2), ioctl(2) etc., are not allowed on the FCL file.


Warning: For compatibility with future VxFS releases, the FCL file might be pulled out of the namespace. Standard system calls may no longer work. Therefore, it is recommended that all new applications be developed using the programmatic interface.

See Programmatic interface.