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Allow configuration files to be placed outside the data directory.
Add new postgresql.conf variables to point to data, pg_hba.conf, and pg_ident.conf files. Needs more documentation.
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@@ -1,5 +1,5 @@
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<!--
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$PostgreSQL: pgsql/doc/src/sgml/ref/postmaster.sgml,v 1.50 2004/06/21 04:06:04 tgl Exp $
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$PostgreSQL: pgsql/doc/src/sgml/ref/postmaster.sgml,v 1.51 2004/07/11 00:18:41 momjian Exp $
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PostgreSQL documentation
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-->
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@@ -67,15 +67,28 @@ PostgreSQL documentation
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One <command>postmaster</command> always manages the data
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from exactly one database cluster. A database cluster is a
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collection of databases that is stored at a common file system
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location. When the <command>postmaster</command> starts it needs to know the location
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of the database cluster files (<quote>data area</quote>). This is
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done with the <option>-D</option> invocation option or the
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<envar>PGDATA</envar> environment variable; there is no default.
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More than one <command>postmaster</command> process can run on a system at one time,
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as long as they use different data areas and different
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location. When the <command>postmaster</command> starts it needs
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to know the location of the database cluster files (<quote>data
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area</quote>).
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More than one <command>postmaster</command> process can run on a system
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at one time as long as they use different data areas and different
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communication ports (see below). A data area is created with <xref
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linkend="app-initdb">.
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</para>
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<para>
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The <quote>data area</> is specified by the <option>-D</option> option
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or the <envar>PGDATA</envar> environment variable; there is no default.
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Typically, it points to a directory created by <application>
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initdb</>. However, for administrative flexibility, you can
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point to a directory containing only configuration files:
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<filename>postgresql.conf</>, <filename>pg_hba.conf</>, and
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<filename>pg_ident.conf</>. You can then set
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<filename>postgresql.conf</>'s <varname>pgdata</> to point to the
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data directory. You can also point just to the server configuration file
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like <filename>postgresql.conf</> and set its variables to point to the
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other configuration files and the data directory.
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</para>
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</refsect1>
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<refsect1 id="app-postmaster-options">
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