Ubuntu Manpage: wimoptimize - Optimize a WIM archive

NAME

       wimoptimize - Optimize a WIM archive

SYNOPSIS

       wimoptimize WIMFILE [OPTION...]

DESCRIPTION

       wimoptimize,  or  equivalently  wimlib-imagex optimize, rebuilds the standalone WIM archive WIMFILE.  The
       new WIM is written to a temporary file, and it is renamed to the original file  when  it's  ready.   This
       will  remove  any  holes  that  have  been  left in the WIM as a result of appending or deleting files or
       images, so the new WIM may be smaller than the old WIM.

       By default, wimoptimize will reuse (not recompress) compressed data and will  not  change  the  solid  or
       pipable status of the WIM.  However, it can also perform recompression and/or convert between solid, non-
       solid, pipable, and non-pipable WIMs; see the options and examples below.

OPTIONS

--check
Before optimizing the WIM, verify its integrity if it contains extra integrity information. Also
include extra integrity information in the optimized WIM, even if it was not present before.

--nocheck
Do not include extra integrity information in the optimized WIM, even if it was present before.

--include-integrity
Include extra integrity information in the optimized WIM, i.e. like --check but don't also verify
the WIM beforehand.

--recompress
Recompress all data in the WIM while optimizing it. This will significantly increase the time
needed to optimize the WIM, but it may result in a better compression ratio if wimlib can do a
better job than the program that created the WIM --- which is likely the case if the WIM was
Microsoft-created, as wimlib's compressors are slightly stronger.

--compress=TYPE[:LEVEL]
Recompress the WIM 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 wimcapture(1) for more details.

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

--solid
Create a "solid" archive that compresses multiple files together. This usually results in a
significantly better compression ratio but has disadvantages such as reduced compatibility. See
the documentation for this option to wimcapture(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 wimcapture(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 wimcapture(1) for more details.

--threads=NUM_THREADS
Number of threads to use for compressing data. Default: autodetect (number of processors).

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

--not-pipable
Rebuild the WIM in the non-pipable format.

--unsafe-compact
Compact the WIM in-place, without using a temporary file. Existing resources are shifted down to
fill holes and new resources are appended as needed. The WIM is truncated to its final size, which
may shrink the on-disk file. This is more efficient than a full rebuild, but it is only supported
when no recompression is being done. More importantly, AN UNSAFE COMPACTION OPERATION CANNOT BE
SAFELY INTERRUPTED! If the operation is interrupted, then the WIM 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

       wimoptimize  does  not  support  split  WIMs  or delta WIMs.  For such files, consider using wimexport(1)
       instead.  Note that wimoptimize is roughly equivalent to:

              wimexport WIMFILE all tmp.wim && mv tmp.wim WIMFILE

EXAMPLES