nilfs_cleanerd (8) Linux Manual Page

nilfs_cleanerd – NILFS2 garbage collector

Synopsis

nilfs_cleanerd [options] device [directory]

Description

nilfs_cleanerd is a system daemon which reclaims disk space of a NILFS2 file system found in device.

The optional directory argument specifies the mount point where the daemon operates. It must be an r/w-mount.

This program can be invoked either automatically by mount.nilfs2(8) or manually by an administrator. However, users are recommended to invoke nilfs_cleanerd through mount.nilfs2(8) or mount(8) and shutdown it through umount.nilfs2(8) or umount(8) in order to avoid state inconsistencies among administration tools.

Options

-c

Specify configuration file.

-h

Display help message and exit.

-n

invoke cleanerd without forking process. This option is intended for internal use from mount.nilfs2(8).

-p

Override protection period with the specified number of seconds.

Signals

nilfs_cleanerd reacts to a set of signals. You may send a signal to nilfs_cleanerd using the PID shown by the mount command (or in /etc/mtab):

# mount -t nilfs2

/dev/sdb1 on /nilfs type nilfs2 (rw,gcpid=PID)
# kill –SIGNAL PID

SIGHUP

This lets nilfs_cleanerd perform a re-initialization. The configuration file (default is /etc/nilfs_cleanerd.conf) will be reread.

SIGTERM

The nilfs_cleanerd will exit cleanly.

SIGUSR1, SIGUSR2

Reserved for future use. These let nilfs_cleanerd die at present.

Files

/etc/nilfs_cleanerd.conf

Configuration file for nilfs_cleanerd. See nilfs_cleanerd.conf(5) for details.

Author

Koji Sato <koji [at] osrg.net>

Availability

nilfs_cleanerd is part of the nilfs-utils package and available from http://www.nilfs.org.

See Also

nilfs(8), mount.nilfs2(8), umount.nilfs2(8), nilfs_cleanerd.conf(5).