xfs_estimate(8) — Linux manual page

NAME \| SYNOPSIS \| DESCRIPTION \| EXAMPLES \| COLOPHON

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

NAME top

       xfs_estimate - estimate the space that an XFS filesystem will take

SYNOPSIS top

       xfs_estimate [ -h ] [ -b blocksize ] [ -i logsize ]
                    [ -e logsize ] [ -v ] directory ...
       xfs_estimate -V

DESCRIPTION top

       For each directory argument, xfs_estimate estimates the space that
       directory would take if it were copied to an XFS filesystem.
       xfs_estimate does not cross mount points.  The following
       definitions are used:
              KB = *1024
              MB = *1024*1024
              GB = *1024*1024*1024

       The xfs_estimate options are:

       -b blocksize
              Use blocksize instead of the default blocksize of 4096
              bytes.  The modifier k can be used after the number to
              indicate multiplication by 1024.  For example,

                   xfs_estimate -b 64k /

              requests an estimate of the space required by the directory
              / on an XFS filesystem using a blocksize of 64K (65536)
              bytes.

       -v     Display more information, formatted.

       -h     Display usage message.

       -i, -e logsize
              Use logsize instead of the default log size of 1000 blocks.
              -i refers to an internal log, while -e refers to an
              external log.  The modifiers k or m can be used after the
              number to indicate multiplication by 1024 or 1048576,
              respectively.

              For example,

                   xfs_estimate -i 1m /

              requests an estimate of the space required by the directory
              / on an XFS filesystem using an internal log of 1 megabyte.

       -V     Print the version number and exits.

EXAMPLES top

       % xfs_estimate -e 10m /var/tmp
       /var/tmp will take about 4.2 megabytes
               with the external log using 2560 blocks or about 10.0 megabytes

       % xfs_estimate -v -e 10m /var/tmp
       directory                     bsize   blocks    megabytes    logsize
       /var/tmp                       4096      792        4.0MB   10485760

       % xfs_estimate -v /var/tmp
       directory                     bsize   blocks    megabytes    logsize
       /var/tmp                       4096     3352       14.0MB   10485760

       % xfs_estimate /var/tmp
       /var/tmp will take about 14.0 megabytes

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,
       send it to [email protected].  This page was obtained from
       the project's upstream Git repository
       ⟨https://git.kernel.org/pub/scm/fs/xfs/xfsprogs-dev.git⟩ on
       2025-08-11.  (At that time, the date of the most recent commit
       that was found in the repository was 2025-06-23.)  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 [email protected]

                                                          xfs_estimate(8)