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   filefrag    ( 8 )

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Имя (Name)

filefrag - report on file fragmentation

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Синопсис (Synopsis)

filefrag [ -bblocksize ] [ -BeEkPsvVxX ] [ files... ]

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Описание (Description)

filefrag reports on how badly fragmented a particular file might be. It makes allowances for indirect blocks for ext2 and ext3 file systems, but can be used on files for any file system.

The filefrag program initially attempts to get the extent information using FIEMAP ioctl which is more efficient and faster. If FIEMAP is not supported then filefrag will fall back to using FIBMAP.

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Параметры (Options)

-B     Force the use of the older FIBMAP ioctl instead of the
              FIEMAP ioctl for testing purposes.

       -bblocksize
              Use blocksize in bytes, or with [KMG] suffix, up to 1GB
              for output instead of the file system blocksize.  For
              compatibility with earlier versions of filefrag, if
              blocksize is unspecified it defaults to 1024 bytes.  Since
              blocksize is an optional argument, it must be added
              without any space after -b.

       -e     Print output in extent format, even for block-mapped
              files.

       -E     Display the contents of ext4's extent status cache.  This
              feature is not supported on all kernels, and is only
              supported on ext4 file systems.

       -k     Use 1024-byte blocksize for output (identical to
              '-b1024').

       -P     Pre-load the ext4 extent status cache for the file.  This
              is not supported on all kernels, and is only supported on
              ext4 file systems.

       -s     Sync the file before requesting the mapping.

       -v     Be verbose when checking for file fragmentation.

       -V     Print version number of program and library.  If given
              twice, also print the FIEMAP flags that are understood by
              the current version.

       -x     Display mapping of extended attributes.

       -X     Display extent block numbers in hexadecimal format.

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