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

       drpmsync	- sync a file tree with	deltarpms

       drpmsync	[-c config] [source] dir
       drpmsync	[-s|-S]	serverconfig

       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 pro-
       gram for	normal file trees.

       Drpmsync	can run	in two modes: as a client it connects to a server, re-
       ceives  a  file list and	brings the tree	up to date, as a server	it an-
       swers incoming requests and transmits files and rpms.

       In this mode drpmsync updates the tree in dir.  It opens	the configura-
       tion  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  ver-
       sion 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  in-
       stead  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  network
       connection so that applydeltarpm	takes longer than transmitting the ful

       deltarpmpath: path

       Sets the	directory where	drpmsync searches for the  deltarpm  programs.
       The default is to search	the $PATH variable.

       Drpmsync	 can wither work as CGI	script or as a standalone server.  CGI
       script mode is automatically selected if	the REQUEST_METHOD environment
       variable	 is set. In this mode drpmsync expects the DRPMSYNC_CONFIG en-
       vironment 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  drpmsync
       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	 auto-
       matically  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, ac-
       cess  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	direc-
       tives 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  do-
       main 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.

	      directory	used to	store the deltas
	      lock used	to serialize syncrpm calls
	      temporary	storing	space for the transmitted objects
	      md5sum cache to speed up the calculation of the tree state
	      contains	the  time  of the last finished	sync and the last time
	      the remote tree state was	requested.

       makedeltarpm(8),	combinedeltarpm(8), applydeltarpm(8),

       Michael Schroeder <>

				   Jun 2005			   DRPMSYNC(8)


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