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pg_wrapper(1) [debian man page]

PG_WRAPPER(1)						 Debian PostgreSQL infrastructure					     PG_WRAPPER(1)

NAME

       pg_wrapper - wrapper for PostgreSQL client commands

SYNOPSIS

       client-program [--cluster version/cluster] [...]

       (client-program: psql, createdb, dropuser, and all other client programs installed in /usr/lib/postgresql/version/bin).

DESCRIPTION

       This program is run only as a link to names which correspond to PostgreSQL programs in /usr/lib/postgresql/version/bin. It determines the
       configured cluster and database for the user and calls the appropriate version of the desired program to connect to that cluster and
       database, supplying any specified options to that command.

       The target cluster is selected by the following means, in descending order of precedence:

       1.  explicit specification with the --host option

       2.  explicit specification with the --cluster option

       3.  if the PGHOST environment variable is set, no further cluster selection is performed. The default PostgreSQL version and port number
	   (from the command line, the environment variable PGPORT, or default 5432) will be used.

       4.  explicit specification with the PGCLUSTER environment variable

       5.  matching entry in ~/.postgresqlrc (see postgresqlrc(5)), if that file exists

       6.  matching entry in /etc/postgresql-common/user_clusters (see user_clusters(5)), if that file exists

       7.  If only one local cluster exists, that one will be selected.

       8.  If several local clusters exist, the one listening on the default port 5432 will be selected.

       If none of these rules match, pg_wrapper aborts with an error.

OPTIONS

       --cluster version/cluster
	   cluster is either the name of a local cluster, or takes the form host:port for a remote cluster. If port is left empty (i. e. you just
	   specify host:), it defaults to 5432.

ENVIRONMENT

       PGCLUSTER
	   If $PGCLUSTER is set, its value (of the form version/cluster) specifies the desired cluster, similar to the --cluster option. However,
	   if --cluster is specified, it overrides the value of $PGCLUSTER.

       PG_CLUSTER_CONF_ROOT
	   This specifies an alternative base directory for cluster configurations. This is usually /etc/postgresql/, but for testing/development
	   purposes you can change this to point to e. g. your home directory, so that you can use the postgresql-common tools without root
	   privileges.

FILES

       /etc/postgresql-common/user_clusters
	   stores the default cluster and database for users and groups as set by the administrators.

       $HOME/.postgresqlrc
	   stores defaults set by the user himself.

SEE ALSO

       user_clusters(5), postgresqlrc(5)

AUTHOR

       Martin Pitt <mpitt@debian.org>

Debian								    2013-01-04							     PG_WRAPPER(1)

Check Out this Related Man Page

CLUSTER(1)						      General Commands Manual							CLUSTER(1)

NAME

       cluster - find clusters in a graph and augment the graph with this information.

SYNOPSIS

       cluster [-v?]  [ -Ck ] [ -ck ] [ -o outfile ] [ files ]

DESCRIPTION

       cluster takes as input a graph in DOT format, finds node clusters and augments the graph with this information.	The clusters are specified
       by the "cluster" attribute attached to nodes; cluster values are non-negative integers.	cluster attempts to maximize the modularity of the
       clustering.  If the edge attribute "weight" is defined, this will be used in computing the clustering.

OPTIONS

       The following options are supported:

       -Ck    specifies  a targeted number of clusters that should be generated.  The specified number k is only a suggestion and may not be real-
	      isable.  If k == 0, the default, the number of clusters that approximately optimizes the modularity is returned.

       -ck    specifies clustering method.  If k == 0, the default, the modularity will be used. If k == 1 modularity quality will be used.

       -ooutfile
	      Specifies that output should go into the file outfile. By default, stdout is used.

       -v     Verbose mode.

EXAMPLES

       Applying cluster to the following graph,

	  graph {
	      1--2 [weight=10.]
	      2--3 [weight=1]
	      3--4 [weight=10.]
	      4--5 [weight=10]
	      5--6 [weight=10]
	      3--6 [weight=0.1]
	      4--6 [weight=10.]
	     }

       gives

	  graph {
		node [cluster="-1"];
		1 [cluster=1];
		2 [cluster=1];
		3 [cluster=2];
		4 [cluster=2];
		5 [cluster=2];
		6 [cluster=2];
		1 -- 2 [weight="10."];
		2 -- 3 [weight=1];
		3 -- 4 [weight="10."];
		4 -- 5 [weight=10];
		5 -- 6 [weight=10];
		3 -- 6 [weight="0.1"];
		4 -- 6 [weight="10."];
	  }

AUTHOR

       Yifan Hu <yifanhu@research.att.com>

SEE ALSO

       gvmap(1)

       Blondel, V.D., Guillaume, J.L., Lambiotte, R., Lefebvre, E.: Fast unfolding of  communities  in	large  networks.  Journal  of  Statistical
       Mechanics: Theory and Experiment (2008), P10008.

								   3 March 2011 							CLUSTER(1)
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