Please reply to the mailing list, not directly to me.
Reply follows below.
On 10/17/2012 10:46 PM, GMAIL wrote:
i want that the main pc save two identical databases, the first
database will be saved on local hard drive and the second database
will be saved on a nas.
if the main pc has a failover, a second pc will be turned up with the
same ip and access to the database on the nas
How do you intend to get the main pc to save two identical databases?
I wouldn't recommend running Pg off a NAS file system like NFS or CIFS.
This plan is fragile and failure prone. I very strongly recommend that
you use replication instead. See
http://www.postgresql.org/docs/current/static/high-availability.html
<http://www.postgresql.org/docs/8.3/static/high-availability.html>
http://wiki.postgresql.org/wiki/Shared_Storage
--
Craig Ringer