Date: 04/07
Affected NV Version: all
OS Version: all Linux/Unix
Plugin version: all File System plugin
Application version: n/a
Description:
Which files will be included in an incremental backup of a Linux/Unix filesystem?
Symptoms:
n/a
If the size of the file has changed since the last backup,or if the Change Time (ctime) of a file is later than the time of the last backup for the particular selection set, the file will be included in the next incremental backup.
By default the Unix file system plugin selects items for backup using ctime not mtime - ctime is the inode change time.
The use of ctime not mtime means a file is backed up when the permissions on a file are changed in addition to when the file contents are modified.
This is intended behaviour. If a file is backed up, then restored, it will be included in the next incremental backup (ctime set with the current timestamp at the time of the restore).
* mtime can be checked by "ls -l" command.
* ctime can be checked by "ls -lc" command.
