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Add section to Migration talking about typical areas that change between

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major releases.
This commit is contained in:
Bruce Momjian 2008-02-13 22:44:06 +00:00
parent 3a1bd025ba
commit 74de091473
1 changed files with 64 additions and 8 deletions
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doc/src/sgml/backup.sgml
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@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/backup.sgml,v 2.113 2008/01/23 20:21:37 tgl Exp $ -->
<!-- $PostgreSQL: pgsql/doc/src/sgml/backup.sgml,v 2.114 2008/02/13 22:44:06 momjian Exp $ -->
<chapter id="backup">
<title>Backup and Restore</title>
@ -1909,13 +1909,6 @@ pg_dumpall -p 5432 | psql -d postgres -p 6543
of downtime for an upgrade.
</para>
<para>
In practice you probably want to test your client
applications on the new setup before switching over completely.
This is another reason for setting up concurrent installations
of old and new versions.
</para>
<para>
If you cannot or do not want to run two servers in parallel, you can
do the backup step before installing the new version, bring down
@ -1955,5 +1948,68 @@ psql -f backup postgres
moving an installation like this will not work.)
</para>
</note>
<para>
In practice you probably want to test your client applications on the
new version before switching over completely. This is another reason
for setting up concurrent installations of old and new versions. When
testing a <productname>PostgreSQL</> major upgrade, consider the
following categories of possible changes:
</para>
<variablelist>
<varlistentry>
<term>Administration</term>
<listitem>
<para>
The capabilities available for administrators to monitor and control
the server often change and improve in each major release.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>SQL</term>
<listitem>
<para>
Typically this includes new SQL command capabilities and not changes
in behavior, unless specifically mentioned in the release notes.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>Library API</term>
<listitem>
<para>
Typically libraries like <application>libpq</> only add new
functionality, again unless mentioned in the release notes.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>System Catalogs</term>
<listitem>
<para>
System catalog changes usually only affect database management tools.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>Server C-language API</term>
<listitem>
<para>
This involved changes in the backend function API, which is written
in the C programming language. Such changes effect code that
references backend functions deep inside the server.
</para>
</listitem>
</varlistentry>
</variablelist>
</sect1>
</chapter>