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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)

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

drpmsync - sync a file tree with deltarpms SYNOPSIS
drpmsync [-c config] [source] dir drpmsync [-s|-S] serverconfig cgi-bin/drpmsync DESCRIPTION
Drpmsync keeps a local file system tree in sync with a remote one. Its intended use is to work with rpm trees; the deltarpm technology can only save bandwidth if rpms get transmitted. Please use the rsync program for normal file trees. Drpmsync can run in two modes: as a client it connects to a server, receives a file list and brings the tree up to date, as a server it answers incoming requests and transmits files and rpms. CLIENT MODE
In this mode drpmsync updates the tree in dir. It opens the configuration file dir/drpmsync/config to get information about which server to use and other settings. You can specify a different configuration file with the -c option. The following settings are understood (the default for the boolean settings is false): source: server1 server2... This is a list of servers to connect to. Drpmsync advances through this list until a working server is found. If a source is specified on the command line it is used instead of the one from the configuration. The syntax for the server entries is "host[:port]/tree". log: logfile Specifies the name of a logfile. If the name does not start with a slash, dir/drpmsync/ is prepended to it. generate_deltas: true|false Controls whether drpmsync generates a delta if it receives a new version of a rpm and the server doesn't provide a delta. This is only use- ful if the local tree is also exported to other clients via a local drpmsync server. generate_delta_compression: comp This parameter is forwarded to the makedeltarpm program when creating deltas. An example would be gzip,gzip. keep_deltas: true|false Tell drpmsync to save received or freshly created deltas to the dir/drpmsync/delta directory. Automatically true if generate_deltas or keep_uncombined is set to true. keep_uncombined: true|false This tells drpmsync to request uncombined deltas from the server instead of a precombined single delta. This makes sense if you re-export the tree and want to maximize the number of versions your clients can update from. always_get_rpm: true|false Configures whether drpmsync should request that the full rpm is always sent along with the delta. Only makes sense if you have a fast net- work connection so that applydeltarpm takes longer than transmitting the ful rpm. deltarpmpath: path Sets the directory where drpmsync searches for the deltarpm programs. The default is to search the $PATH variable. SERVER MODE
Drpmsync can wither work as CGI script or as a standalone server. CGI script mode is automatically selected if the REQUEST_METHOD environ- ment variable is set. In this mode drpmsync expects the DRPMSYNC_CONFIG environment variable to contain the path to a server config file. For apache you can set this with the SetEnv directive. Standalone mode is selected with the -s or -S option. In this mode the server configuration must be specified as an argument to the drpm- sync program. The -s option makes the drpmsync program background itself and exit right away, while -S keeps the server in the foreground. The server configuration can contain the following settings: allow: pattern1 pattern2... deny: pattern1 pattern2... This provides the access control for the server. pattern can either be a simple glob pattern (only * is supported) or it can be a full regular expression if it is written as /RE/. The regular expression is automatically anchored at the start and the end. Examples are 10.10.* or /10.10..*/ If either the numerical ip address or the domain name of the client matches any entry of the deny list, access is forbidden. Otherwise the allow list is searched for a match. If none is found, access is also denied. The default setting for both lists is empty, so you have to provide an allow list to allow access for the clients. log: logfile Specifies the path of a logfile. no_combine: true|false If this setting is true the server does not combine deltarpms. This increases to amount of data that has to be transferred but reduces the processor load on the server. tree: external_path internal_path This statements exports the tree located at internal_path to the clients as directory external_path. All of the above settings are saved as settings of this particular tree, so different trees can use different configurations. This also means that the configuration directives of a tree must be above the tree statement. The following settings are global and only needed for standalone mode: serverlog: logfile Specifies the path of a logfile used for logging server events. servername: hostname[:port] The name of the server. If hostname is empty, the fully qualified domain name is used instead. The port defaults to port 80. serveraddr: addr This address is used for binding the server's socket. If not specified, connections can come from any interface. serveruser: user servergroup: group Configures the user and group the servers swicthes to after binding the socket to the desired port. Examples are nobody or wwwrun. maxclients: num This settings limits the maximum number of concurrent connections to num. The default value is 10 connections. deltarpmpath: path Sets the directory where drpmsync searches for the deltarpm programs. The default is to search the $PATH variable. FILES
dir/drpmsync/deltas directory used to store the deltas dir/drpmsync/lock lock used to serialize syncrpm calls dir/drpmsync/wip temporary storing space for the transmitted objects dir/drpmsync/cache md5sum cache to speed up the calculation of the tree state dir/drpmsync/timstamp contains the time of the last finished sync and the last time the remote tree state was requested. SEE ALSO
makedeltarpm(8), combinedeltarpm(8), applydeltarpm(8), AUTHOR
Michael Schroeder <> Jun 2005 DRPMSYNC(8)
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