DRPMSYNC(8)DRPMSYNC(8)NAMEdrpmsync - sync a file tree with deltarpms
SYNOPSISdrpmsync [-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 pro‐
gram 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 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
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 network
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 environment
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 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,
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 transfered 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
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 ALSOmakedeltarpm(8), combinedeltarpm(8), applydeltarpm(8),
AUTHOR
Michael Schroeder <mls@suse.de>
Jun 2005 DRPMSYNC(8)
