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Provide a concrete example of parameter expansion in archive_command.

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Per discussion of bug #3877.  Simon Riggs, some fixes by moi.
This commit is contained in:
Tom Lane 2008-01-23 20:21:37 +00:00
parent 216e63bbce
commit 1570d0467a
1 changed files with 10 additions and 4 deletions
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14
doc/src/sgml/backup.sgml
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@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/backup.sgml,v 2.112 2007/12/17 09:03:52 momjian Exp $ -->
<!-- $PostgreSQL: pgsql/doc/src/sgml/backup.sgml,v 2.113 2008/01/23 20:21:37 tgl Exp $ -->
<chapter id="backup">
<title>Backup and Restore</title>
@ -64,7 +64,7 @@ pg_dump <replaceable class="parameter">dbname</replaceable> &gt; <replaceable cl
</para>
<para>
As any other <productname>PostgreSQL</> client application,
Like any other <productname>PostgreSQL</> client application,
<application>pg_dump</> will by default connect with the database
user name that is equal to the current operating system user name. To override
this, either specify the <option>-U</option> option or set the
@ -407,7 +407,7 @@ tar -cf backup.tar /usr/local/pgsql/data
smaller than an SQL dump. On the contrary, it will most likely be
larger. (<application>pg_dump</application> does not need to dump
the contents of indexes for example, just the commands to recreate
them.)
them.) However, taking a file system backup might be faster.
</para>
</sect1>
@ -556,7 +556,13 @@ archive_command = 'cp -i %p /mnt/server/archivedir/%f &lt;/dev/null'
</programlisting>
which will copy archivable WAL segments to the directory
<filename>/mnt/server/archivedir</>. (This is an example, not a
recommendation, and might not work on all platforms.)
recommendation, and might not work on all platforms.) After the
<literal>%p</> and <literal>%f</> parameters have been replaced,
the actual command executed might look like this:
<programlisting>
cp -i pg_xlog/00000001000000A900000065 /mnt/server/archivedir/00000001000000A900000065 &lt;/dev/null
</programlisting>
A similar command will be generated for each new file to be archived.
</para>
<para>