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wimlib-imagex-optimize(1)

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  LZX
   ("maximum") 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 https://wimlib.net/compression.html for some benchmark results.

          wimoptimize install.wim --compress=LZX:100

SEE ALSO

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



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