xfs_estimate - estimate the space that an XFS filesystem will take
xfs_estimate [ -h? ] [ -b blocksize ] [ -i logsize ] [ -e logsize ] [ -v ] directory ...
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:
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-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. |
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-v -h -? -i, -e logsize |
Display more information, formatted. Display usage message. Display usage message. Use logsize instead of the default log size of 10 MB. -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. |
If xfs_estimate is run on an XFS filesystem, the estimate is less reliable than on an EFS filesystem.
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% xfs_estimate -e 10m /var/tmp /var/tmp will take about 4.2 megabytes % xfs_estimate -v -e 10m /var/tmp directory bsize blocks |
blocks megabytes logsize /var/tmp |
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4096 792 4.0MB 10485760 % xfs_estimate -v /var/tmp directory bsize blocks megabytes |
logsize /var/tmp 4096 |
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3352 14.0MB 10485760 % xfs_estimate /var/tmp /var/tmp will take about 14.0 megabytes |