MAKEDELTARPM(8)                                                                                                  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, spec-
       ify 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 identi-
       cal 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  speci-
       fied.  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 <mlsATsuse.de>



                                                            Jul 2010                                             MAKEDELTARPM(8)