NAME

       nilfs-clean - run garbage collector on NILFS file system

SYNOPSIS

       nilfs-clean [options] [device]

DESCRIPTION

       The nilfs-clean program communicates with nilfs_cleanerd(8) program and controls execution
       of garbage collection (GC) on NILFS2 file systems.  It can be used to manually run garbage
       collection of a file system mounted on device to increase the free space.

       If  a  GC  command  is specified by one of the following options (i.e. ´-c´,´-s´,´-r´, and
       ´-l´ options), the command is sent to and performed on the nilfs_cleanerd(8) program.   If
       no commands are specified, nilfs-clean just triggers a one-pass cleaning.

       When device is omitted, nilfs-clean selects an active NILFS2 file system in the system.

       This  command  is  valid only for mounted NILFS2 file systems, and will fail if the device
       has no active mounts.

OPTIONS

       -b, --break, --stop
              Stop garbage collection.

       -c, --reload[=conffile]
              Request reloading config file to cleaner process.   If  an  optional  configuration
              file  is  given,  the  file  is  read  by  nilfs_cleanerd(8)  program  and  cleaner
              configuration  is  reset  to  the  information.   If  no  argument  is   given,   a
              configuration file selected by nilfs_cleanerd(8) will be reloaded.

       -l, --status
              Display cleaner status.

       -h, --help
              Display help message and exit.

       -m, --min-reclaimable-blocks=COUNT[%]
              Specify  the  minimum  number  of  reclaimable blocks in a segment before it can be
              cleaned. If the argument is followed by a percent sign, it represents the ratio  of
              blocks  in  a segment. This argument will only have an effect if the use_set_suinfo
              flag is set in the configuration file.

       -p, --protection-period=interval
              Set protection period for a cleaner run.  The  interval  parameter  is  an  integer
              value  and  specifies  the  minimum  time  that  deleted  or  overrode data will be
              preserved in the file system.  Smaller values will  increase  free  space  made  by
              garbage  collection.   Optionally, the interval parameter may be suffixed by one of
              the following units designators: ´s´, ´m´, ´h´, ´d´,´w´,´M´, or ´Y´,  for  seconds,
              minutes, hours, days, weeks, months, or years, respectively.

       -q, --quit
              Shutdown cleaner daemon.

       -r, --resume
              Resume garbage collection.

       -s, --suspend
              Suspend garbage collection.  Note that if users manually suspend garbage collection
              with this option, it will not restart automatically until user resumes the  garbage
              collection.

       -S, --speed=COUNT[/SECONDS]
              Set garbage collection speed for a cleaner run.

       -v, --verbose
              Verbose mode.

       -V, --version
              Display version and exit.

AUTHOR

       Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>

AVAILABILITY

       nilfs-clean    is    part   of   the   nilfs-utils   package   and   is   available   from
       http://nilfs.sourceforge.net.

SEE ALSO

       nilfs(8), nilfs_cleanerd(8).