xfs_estimate - estimate the space that an XFS filesystem will take

       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:

       -bblocksize
              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-b64k/

              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,-elogsize
              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-i1m/

              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.

       % xfs_estimate-e10m/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-e10m/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

                                                                                                 xfs_estimate(8)

       xfs_estimate - estimate the space that an XFS filesystem will take

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