MKZFTREE(1)



MKZFTREE(1)                     H. Peter Anvin                     MKZFTREE(1)

NAME
       mkzftree - Create a zisofs/RockRidge compressed file tree

SYNOPSIS
       mkzftree [OPTIONS]... INPUT OUTPUT

DESCRIPTION
       Takes  an input file tree (INPUT) and create a corresponding compressed
       file tree (OUTPUT) that can be used with an appropriately  patched  mk-
       isofs(8)  to  create  a  transparent-compression  ISO  9660/Rock  Ridge
       filesystem using the "ZF" compression records.

OPTIONS
       -f, --force
              Always compress all files, even if they  get  larger  when  com-
              pressed.

       -z level, --level level
              Select compression level (1-9, default is 9).  Lower compression
              levels are faster, but typically result in larger output.

       -u, --uncompress
              Uncompress an already compressed tree.  This can be used to read
              a  compressed  filesystem on a system which cannot read them na-
              tively.

       -p parallelism, --parallelism parallelism
              Compress in parallel.  The parallelism value indicates how  many
              compression threads are allowed to run.

       -x, --one-filesystem
              Do  not  cross filesystem boundaries, but create directory stubs
              at mount points.

       -X, --strict-one-filesystem
              Do not cross filesystem boundaries, and do not create  directory
              stubs at mount points.

       -C path, --crib-path path
              Steal  ("crib")  files from another directory if it looks (based
              on name, size, type and modification time) like they  match  en-
              tries  in  the  new  filesystem.  The "crib tree" is usually the
              compressed version of an older version  of  the  same  workload;
              this  thus  allows  for  "incremental  rebuilds" of a compressed
              filesystem tree.  The files are hardlinked from the crib tree to
              the  output  tree,  so if it is desirable to keep the link count
              correct the crib path should be deleted before running  mkisofs.
              The crib tree must be on the same filesystem as the output tree.

       -l, --local
              Do  not  recurse into subdirectories, but create the directories
              themselves.

       -L, --strict-local
              Do not recurse into subdirectories, and do not  create  directo-
              ries.

       -F, --file
              Indicates  that  INPUT  may not necessarily be a directory; this
              allows operation on a single file.  Note especially that  if  -F
              is specified, and INPUT is a symlink, the symlink itself will be
              copied rather than whatever it happens to point to.

       -s, --sloppy
              Treat file modes, times and ownership data as less than precious
              information  and don't abort if they cannot be set.  This may be
              useful if running mkisofs on an input tree you do not own.

       -v, --verbose
              Increase the program verbosity.

       -V value, --verbosity value
              Set the program verbosity to value.

       -q, --quiet
              Issue no messages whatsoever, including error messages.  This is
              the same as specifying -V 0.

       -h, --help
              Display a brief help message.

       -w, --version
              Display the release version.

BUGS
       Long  options (beginning with --) may not work on all systems.  See the
       message printed out by mkzftree -h to see if this applies to your  sys-
       tem.

       Inode  change  times (ctimes) are not copied.  This is a system limita-
       tion and applies to all file copy programs.

       If using the parallel option (-z) the access times (atimes) on directo-
       ries  may  or may not be copied.  If it is important that the atimes on
       directories are copied exactly, avoid using -z.

AUTHOR
       Written by H. Peter Anvin <hpa@zytor.com>.

COPYRIGHT
       Copyright (C) 2001-2002 H. Peter Anvin.
       This is free software; see the source for copying conditions.  There is
       NO  warranty;  not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR
       PURPOSE.

SEE ALSO
       mkisofs(8)

zisofs-tools                     30 July 2001                      MKZFTREE(1)

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