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)