NAME | SYNOPSIS | DESCRIPTION | OPTIONS | COMMANDS | COLOPHON

xfs_spaceman(8)            System Manager's Manual           xfs_spaceman(8)

NAME         top

       xfs_spaceman - show free space information about an XFS filesystem

SYNOPSIS         top

       xfs_spaceman [ -c cmd ] file
       xfs_spaceman -V

DESCRIPTION         top

       xfs_spaceman reports and controls free space usage in an XFS
       filesystem.

OPTIONS         top

       -c cmd    xfs_spaceman commands may be run interactively (the
                 default) or as arguments on the command line. Multiple -c
                 arguments may be given. The commands are run in the
                 sequence given, then the program exits.

COMMANDS         top

       freesp [ -dgrs ] [-a agno]... [ -b | -e bsize | -h bsize | -m factor
       ]
              With no arguments, freesp shows a histogram of all free space
              extents in the filesystem.  The command takes the following
              options:

                 -a agno
                     Collect free space information from this allocation
                     group.  This option can be specified multiple times to
                     collect from multiple groups.

                 -b  This argument establishes that the histogram bin sizes
                     are successive powers of two.  This is the default, and
                     is mutually exclusive with the -e, -h, and -m options.

                 -d  Print debugging information such as the raw free space
                     extent information.

                 -g  Print the free space block and extent counts for each
                     AG.

                 -e bsize
                     Set all histogram bin sizes to a specific value.  This
                     option is mutually exclusive with the -b, -h, and -m
                     options.

                 -h bsize
                     Create a histogram bin with a lower bound of this
                     value.  The upper bound of this bin will be one less
                     than the lower bound of the next highest histogram bin.
                     This option can be given multiple times to control the
                     exact bin sizes.  This option is mutually exclusive
                     with the -b, -e, and -m options.

                 -m factor
                     Create each histogram bin with a size that is this many
                     times the size of the prvious bin created.  This option
                     is mutually exclusive with the -b, -e, and -h options.

                 -r  Query the realtime device for free space information.

                 -s  Display a summary of the free space information found.

       help [ command ]
              Display a brief description of one or all commands.

       prealloc [ -u id ] [ -g id ] [ -p id ] [ -m minlen ] [ -s ]
              Removes speculative preallocation.  If no -u, -g, or -p
              options are given, this command acts on all files.  The
              command takes the following options:

                 -u uid
                     Clear all speculative preallocations for files with
                     this user id.  This option can be given in combination
                     with the -g  and  -p options.

                 -g gid
                     Clear all speculative preallocations for files with
                     this group id.  This option can be given in combination
                     with the -u  and  -p options.

                 -p pid
                     Clear all speculative preallocations for files with
                     this project id.  This option can be given in
                     combination with the -u  and  -g options.

                 -m minlen
                     Ignore all files smaller than this size.  Units can be
                     supplied for this argument.

                 -s  Wait for removal to complete.

       print  Display a list of all open files.

       quit   Exit xfs_spaceman.

       trim ( -a agno | -f | offset length ) [ -m minlen ]
              Instructs the underlying storage device to release all storage
              that may be backing free space in the filesystem.  The command
              takes the following options: (One of -a, -f, or the
              offset/length pair are required.)

                 -a agno
                     Trim free space extents in the given allocation group.
                     This option is mutually exclusive with the -f option
                     and the offset/length options.

                 -f  Trim all free space in the filesystem.  This option is
                     mutually exclusive with the -a option and the
                     offset/length options.

                 option, length
                     Trim all free space within the physical range defined
                     by the offset and length from this filesystem.  Units
                     can be appended to these arguments.  This option is
                     mutually exclusive with the -a and -f options.

                 -m minlen
                     Do not trim free space extents shorter than this
                     length.  Units can be appended to this argument.

COLOPHON         top

       This page is part of the xfsprogs (utilities for XFS filesystems)
       project.  Information about the project can be found at 
       ⟨http://xfs.org/⟩.  If you have a bug report for this manual page, see
       ⟨http://oss.sgi.com/bugzilla/buglist.cgi?product=XFS⟩.  This page was
       obtained from the project's upstream Git repository
       ⟨git://oss.sgi.com/xfs/cmds/xfsprogs⟩ on 2018-02-02.  (At that time,
       the date of the most recent commit that was found in the repository
       was 2017-11-27.)  If you discover any rendering problems in this HTML
       version of the page, or you believe there is a better or more up-to-
       date source for the page, or you have corrections or improvements to
       the information in this COLOPHON (which is not part of the original
       manual page), send a mail to man-pages@man7.org

                                                             xfs_spaceman(8)