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Thomas Trepl (Moody) 2021-12-04 13:20:27 +01:00
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server/databases/upgradedb.xml
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@ -12,7 +12,12 @@
<date>$Date$</date>
</sect1info>
<title>Notes on Database Server Software</title>
<title>Important notes about upgrading Database Server Software</title>
<para>Lets start this chapter a bit dramatic with a screenshot
of an issue that really happened. Don't be scared if you read
this the first time, this issue will not occur if you are going
to install the software the first time:</para>
<screen>$ sudo systemctl status postgresql
-- postgresql.service - PostgreSQL database server
@ -38,8 +43,14 @@ Oct 26 17:11:53 SRVNAME systemd[1]: Failed to start PostgreSQL database server.<
upgrade.
</para>
<para>
Even if you are installing a DBMS the initial time, read it
anyway, it might give you a guideline on how to set up backup
The root cause of the issue shown above was an upgrade
of the server software to a newer major version but letting the
data files untouched. The admin was able to recover without any
loss of data.
</para>
<para>
Even if you are installing a DBMS the initial time, read this
section too, it might give you a guideline on how to set up backup
and restore procedures (at least the strategy for building
them) which are sufficient for your needs and for the safety
of your data.
@ -170,7 +181,7 @@ Oct 26 17:11:53 SRVNAME systemd[1]: Failed to start PostgreSQL database server.<
</sect3>
<sect3>
<title>Upgrade by system tools</title>
<title>Upgrade data file by using system tools</title>
<para>
Some database systems (for instance Postgresql) provides