From: | Lewis Kapell <lkapell(at)setonhome(dot)org> |
---|---|
To: | pgsql-admin(at)postgresql(dot)org |
Subject: | Migrating from 8.3 to 8.4 on the same server |
Date: | 2010-04-14 17:29:23 |
Message-ID: | 4BC5FB73.9@setonhome.org |
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Lists: | pgsql-admin |
In the documentation under the heading "Migration Between Releases" we
read:
<<It is also possible to use replication methods, such as Slony, to
create a slave server with the updated version of PostgreSQL. The slave
can be on the same computer or a different computer. [...] Such a
switch-over results in only several seconds of downtime for an upgrade. >>
In the section "Warm Standby Servers for High Availability" it says:
<< For testing purposes, it is possible to run both primary and standby
servers on the same system. >>
Although this section does not use the term Point-In-Time Recovery, I
understand this is what it refers to. Could the WAL/PITR method then be
used to upgrade from 8.3 to 8.4 on the same server and avoid having the
significant downtime of dump/restore?
If so, I understand the two servers would have to run on different
ports. Are there any other issues/traps to be aware of?
--
Thank you,
Lewis Kapell
Computer Operations
Seton Home Study School
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