xenial (1) wimoptimize.1.gz

NAME

       wimlib-imagex-optimize - Optimize a WIM archive

SYNOPSIS

       wimlib-imagex optimize WIMFILE [OPTION...]

DESCRIPTION

       wimlib-imagex  optimize  will rebuild the stand-alone WIM WIMFILE.  The new WIM is written to a temporary
       file, and it is renamed to the original file when it's ready.  This action will  remove  any  holes  that
       have been left as a result of appending images, so the new WIM may be slightly smaller than the old WIM.

       By   default,  compressed  data  will  be  re-used,  and  not  recompressed.   Use  the  --recompress  or
       --compress=TYPE[:LEVEL] option to request recompression.

       This command is also available as simply wimoptimize if the appropriate hard link or batch file has  been
       installed.

OPTIONS

       --check
             When  reading WIMFILE, verify its integrity if an integrity table is present.  In addition, include
             an integrity table in the optimized WIM.  If this option is not specified, by default the integrity
             table  (if  present)  is  not checked, and an integrity table is included in the rebuilt WIM if and
             only if one was present in the original WIM.

       --nocheck
             Neither verify the integrity of WIMFILE using the integrity table, nor include an  integrity  table
             in the rebuilt WIM file.

       --recompress
             Recompress  all  compressed  streams in WIMFILE when rebuilding it.  This will greatly increase the
             time needed to rebuild the WIM file, but it may result in a better compression ratio if wimlib  can
             do a better job than the program that wrote the original file.

       --compress=TYPE[:LEVEL]
             Recompress  the  WIM  file  using  the  specified  compression  type,  and optionally the specified
             compression level for that compression type.  This implies --recompress.

             See the documentation for this option to wimlib-imagex capture (1) for more details.

       --chunk-size=SIZE
             Set the WIM compression chunk size to SIZE.  See the documentation for this option to wimlib-imagex
             capture (1) for more details.

       --solid
             Create  a  "solid"  archive  that  compresses multiple files together.  This can result in a higher
             compression ratio, but has disadvantages such as reduced compatibility.  See the documentation  for
             this option to wimlib-imagex capture (1) for more details.

       --solid-chunk-size=SIZE
             Like  --chunk-size, but set the chunk size used in solid resources.  See the documentation for this
             option to wimlib-imagex capture (1) for more details.

       --solid-compress=TYPE[:LEVEL]
             Like --compress, but set the compression type used in solid resources.  See the  documentation  for
             this option to wimlib-imagex capture (1) for more details.

       --threads=NUM_THREADS
             Number  of  threads to use for compressing data.  Default: autodetect (number of processors).  This
             parameter only has an effect when data recompression is requested.

       --pipable
             Rebuild the WIM so that it can be applied fully sequentially, including from a pipe.   See  wimlib-
             imagex capture(1) for more details about creating pipable WIMs.  By default, when neither --pipable
             or --not-pipable is specified, the rebuilt WIM will be pipable  if  and  only  if  it  was  already
             pipable.

       --not-pipable
             Rebuild the WIM in the non-pipable format.  (This is the default if WIMFILE is not pipable.)

       --unsafe-compact
             Compact the WIM file in-place, without using a temporary file.  Existing resources are shifted down
             to fill holes and new resources are appended as needed.  The WIM file is  truncated  to  its  final
             size,  which  may  shrink  the  on-disk file.  THIS OPERATION CANNOT BE SAFELY INTERRUPTED!  If the
             operation is interrupted, then the WIM file will be corrupted, and it  may  be  impossible  (or  at
             least  very difficult) to recover any data from it.  Users of this option are expected to know what
             they are doing and assume responsibility for any data corruption that may result.

NOTES

       wimlib-imagex optimize does not support split WIMs.

       wimlib-imagex optimize is roughly equivalent to:

              wimlib-imagex export WIMFILE all tmp.wim && mv tmp.wim WIMFILE

EXAMPLES

       Rebuild the WIM file 'install.wim':

              wimoptimize install.wim

       Rebuild and recompress the WIM file 'install.wim':

              wimoptimize install.wim --recompress

       Rebuild and recompress the WIM file 'install.wim', using "maximum" (LZX) compression  at  a  higher-than-
       default compression level.  The compression chunk size remains unchanged.  This command will be slow, but
       it might be useful for optimizing files for distribution.  See  the  COMPRESSION  RATIO  section  of  the
       README file for some benchmark results.

              wimoptimize install.wim --compress=maximum:100

SEE ALSO

       wimlib-imagex(1) wimlib-imagex-export(1) wimlib-imagex-verify(1)