Taking databases offline

From: "Mariusz Czuada" <manieq(at)idea(dot)net(dot)pl>
To: pgsql-hackers(at)postgresql(dot)org
Subject: Taking databases offline
Date: 2001-11-22 07:17:20
Message-ID: 9th99h$es4$1@news.tpi.pl
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Hi!

Is it possible (and safe) to move database files to other location while
server is working? I had to move one to another volume/path and 'sym-linked'
it to old dir. But had to shutdown server first. So my question (and
suggestion) is to consider:

ALTER DATABASE <dbname> { OFFLINE [ { WAIT | IMMEDIATE }] | ONLINE };

Taking db offline with IMMEDIATE disconnects all sessions, with WAIT
option... waits for all sessions to disonnect, with no options - fails if
anyone is connected to database; then file system actions are allowed (like
in my case). After ALTER... ONLINE normal use of database is restored.

Waitng for comments,

Mariusz Czulada

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