A. Kretschmer, 11.02.2010 09:42:
In response to Thomas Kellerer :
Marc Lustig, 08.02.2010 11:36:
Hi, can we safely put the data from /var/lib/postgresql/8.4/main/ of
server x to /var/lib/postgresql/8.3/main/ of server y, considering
that the new target machine is running 8.3 whereas the old one ran
8.4 ?
No, a dump& restore is required (as stated in the release notes)
You can also try pg_migrator. It was introduced with 8.4 and will upgrade
the data "in-place" (i.e. without a dump and restore)
I don't believe that pg_migrator can do a downgrade ...
Ooops!
I read it the wrong way round (I thought the OP wanted to migrate from 8.3 to 8.4...)
Regards
Thomas
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