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Richard Fish, mused, then expounded: |
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> |
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> IMO xfs_fsr is a little brain-damaged in it's operation (won't |
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> consolidate free space, requires enough space to fully copy a |
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> fragmented file, etc). It is probably not worth running if you have a |
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> sensible partition setup. |
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> |
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|
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It was never designed to work like a WinXX defragger. The man page states |
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exactly what it will do, and consolidating space is not part of it's |
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design. |
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|
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>From the man page - |
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|
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fsr_xfs improves the organization of mounted filesystems. The |
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reorganization algorithm operates on one file at a time, compacting or |
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otherwise improving the layout of the file extents (contiguous blocks of |
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file data). |
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|
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and - |
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|
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When invoked with no arguments fsr_xfs reorganizes all regular files in |
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all mounted filesystems. fsr_xfs makes many cycles over /etc/mtab each |
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time making a single pass over each XFS filesystem. Each pass goes |
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through and selects files that have the largest number of extents. It |
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attempts to defragment the top 10% of these files on each pass. |
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|
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and - |
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|
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fsr_xfs improves the layout of extents for each file by copying the |
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entire file to a temporary location and then interchanging the data |
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extents of the target and temporary files in an atomic manner. This |
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method requires that enough free disk space be available to copy any |
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given file and that the space be less fragmented then the original file. |
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It also requires the owner of the file to have enough remaining filespace |
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quota to do the copy on systems running quotas. fsr_xfs generates a |
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warning message if space is not sufficient to improve the target file. |
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|
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Note - IRIX it's fsr_xfs and Linux it's xfs_fsr. |
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|
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Thus it may not, as you point out, perform the operations that you want it too. |
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|
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xfs_fsr/fsr_xfs was designed to deal with multi-gigabyte and terabyte files. Not |
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to free up space in small partitions. |
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|
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Bob |
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- |
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-- |
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