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 bytewise 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  for  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)