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makedeltarpm(8)


NAME

   makedeltarpm - create a deltarpm from two rpms

SYNOPSIS

   makedeltarpm  [-v]  [-V  version]  [-z  compression]  [-m  mbytes]  [-s
   seqfile] [-r] [-u] oldrpm newrpm deltarpm
   makedeltarpm [-v] [-V version] [-z compression] [-s  seqfile]  [-u]  -p
   oldrpmprint oldpatchrpm oldrpm newrpm deltarpm

DESCRIPTION

   makedeltarpm  creates  a deltarpm from two rpms. The deltarpm can later
   be used to recreate the new rpm from either filesystem data or the  old
   rpm. Use the -v option to make makedeltarpm more verbose about its work
   (use it twice to make it even more verbose).

   If you want to create  a  smaller  and  faster  to  combine  "rpm-only"
   deltarpm  which  does  not  work  with  filesystem data, specify the -r
   option.

   makedeltarpm normally produces a V3 format deltarpm, use the -V  option
   to specify a different version if desired. The -z option can be used to
   specify a different compression method, the default is to use the  same
   compression method as used in the new rpm.

   The  -s  option  makes  makedeltarpm  write  out the sequence id to the
   specified file seqfile.

   If you also use patch rpms you should use the -p option to specify  the
   rpm-print  of  oldrpm  and  the  created  patch  rpm. This option tells
   makedeltarpm to exclude the files that were not included in  the  patch
   rpm but are not byteswise identical to the ones in oldrpm.

   makedeltarpm  can  also  create an "identity" deltarpm by adding the -u
   switch. In this case only one rpm has  to  be  specified.  An  identity
   deltarpm can be useful to just replace the signature header of a rpm or
   to reconstruct a rpm from the filesystem.

MEMORY CONSIDERATIONS

   makedeltarpm normally needs about three to four times the size  of  the
   rpm's  uncompressed  payload.  You  can  use  the -m option to enable a
   sliding block algorithm that needs mbytes  megabytes  of  memory.  This
   trades memory usage with the size of the created deltarpm. Furthermore,
   the uncompressed deltarpm payload is currently also  stored  in  memory
   when this option is used, but it tends to be small in most cases.

SEE ALSO

   applydeltarpm(8) combinedeltarpm(8)

AUTHOR

   Michael Schroeder <mls@suse.de>

                               Jul 2010                    MAKEDELTARPM(8)



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