xfs_estimate

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

NAME

   xfs_estimate - estimate the space that an XFS filesystem will take

SYNOPSIS

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

DESCRIPTION

   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 follow
   ing 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 num
          ber 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

   % 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

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