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makedeltarpm(8) [centos man page]

MAKEDELTARPM(8) 					      System Manager's Manual						   MAKEDELTARPM(8)

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 <> Jul 2010 MAKEDELTARPM(8)

Check Out this Related Man Page

createrepo(8)															     createrepo(8)

createrepo - Create repomd (xml-rpm-metadata) repository SYNOPSIS
createrepo [options] <directory> DESCRIPTION
createrepo is a program that creates a repomd (xml-based rpm metadata) repository from a set of rpms. OPTIONS
-u --baseurl <url> Optional base URL location for all files. -o --outputdir <url> Optional output directory (useful for read only media). -x --excludes <package> File globs to exclude, can be specified multiple times. -i --pkglist <filename> specify a text file which contains the complete list of files to include in the repository from the set found in the directory. File format is one package per line, no wildcards or globs. -n --includepkg specify pkgs to include on the command line. Takes urls as well as local paths. -q --quiet Run quietly. -g --groupfile <groupfile> A precreated xml filename to point to for group information. See examples section below for further explanation. -v --verbose Run verbosely. -c --cachedir <path> Specify a directory to use as a cachedir. This allows createrepo to create a cache of checksums of packages in the repository. In consecutive runs of createrepo over the same repository of files that do not have a complete change out of all packages this decreases the processing time dramatically. --basedir Basedir for path to directories in the repodata, default is the current working directory. --update If metadata already exists in the outputdir and an rpm is unchanged (based on file size and mtime) since the metadata was generated, reuse the existing metadata rather than recalculating it. In the case of a large repository with only a few new or modified rpms this can significantly reduce I/O and processing time. --skip-stat skip the stat() call on a --update, assumes if the filename is the same then the file is still the same (only use this if you're fairly trusting or gullible). --update-md-path Use the existing repodata for --update, from this path. -C --checkts Don't generate repo metadata, if their timestamps are newer than its rpms. This option decreases the processing time drastically again, if you happen to run it on an unmodified repo, but it is (currently) mutual exclusive with the --split option. NOTE: This command will not notice when packages have been removed from repo. Use --update to handle that. --split Run in split media mode. Rather than pass a single directory, take a set of directories corresponding to different volumes in a media set. -p --pretty Output xml files in pretty format. --version Output version. -h --help Show help menu. -d --database Generate sqlite databases for use with yum. This is now the default. --no-database Do not generate sqlite databases in the repository. -S --skip-symlinks Ignore symlinks of packages -s --checksum Choose the checksum type used in repomd.xml and for packages in the metadata. The default is now "sha256" (if python has hashlib). The older default was "sha", which is actually "sha1", however explicitly using "sha1" doesn't work on older (3.0.x) versions of yum, you need to specify "sha". --profile Output time based profiling information. --changelog-limit CHANGELOG_LIMIT Only import the last N changelog entries, from each rpm, into the metadata --unique-md-filenames Include the file's checksum in the metadata filename, helps HTTP caching (default) --simple-md-filenames Do not include the file's checksum in the metadata filename. --retain-old-md Keep around the latest (by timestamp) N copies of the old repodata (so clients with older repomd.xml files can still access it). Default is 0. --distro Specify distro tags. Can be specified more than once. Optional syntax specifying a cpeid( --distro=cpeid,dis- trotag --content Specify keyword/tags about the content of the repository. Can be specified more than once. --repo Specify keyword/tags about the repository itself. Can be specified more than once. --revision Arbitrary string for a repository revision. --deltas Tells createrepo to generate deltarpms and the delta metadata --oldpackagedirs PATH paths to look for older pkgs to delta against. Can be specified multiple times --num-deltas int the number of older versions to make deltas against. Defaults to 1 --read-pkgs-list READ_PKGS_LIST output the paths to the pkgs actually read useful with --update --max-delta-rpm-size MAX_DELTA_RPM_SIZE max size of an rpm that to run deltarpm against (in bytes) --workers WORKERS number of workers to spawn to read rpms --compress-type specify which compression method to use: compat (default), xz (may not be available), gz, bz2. EXAMPLES
Here is an example of a repository with a groups file. Note that the groups file should be in the same directory as the rpm packages (i.e. /path/to/rpms/comps.xml). createrepo -g comps.xml /path/to/rpms FILES
repodata/filelists.xml.gz repodata/other.xml.gz repodata/primary.xml.gz repodata/repomd.xml SEE ALSO
yum (8) yum.conf (5) AUTHORS
See the Authors file BUGS
Any bugs which are found should be emailed to the mailing list: or reported in trac at: http://cre- Seth Vidal 2005 Jan 2 createrepo(8)

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