| From: | Bruce Momjian <bruce(at)momjian(dot)us> |
|---|---|
| To: | Jeff Davis <pgsql(at)j-davis(dot)com> |
| Cc: | PostgreSQL-development <pgsql-hackers(at)postgreSQL(dot)org> |
| Subject: | Re: Using pg_upgrade on log-shipping standby servers |
| Date: | 2012-07-20 16:25:35 |
| Message-ID: | 20120720162535.GA22450@momjian.us |
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| Lists: | pgsql-hackers |
On Tue, Jul 17, 2012 at 06:02:40PM -0400, Bruce Momjian wrote:
> Second, the user files (large) are certainly identical, it is only the
> system tables (small) that _might_ be different, so rsync'ing just those
> would add the guarantee, but I know of no easy way to rsync just the
> system tables.
OK, new idea. I said above I didn't know how to copy just the non-user
table files (which are not modified by pg_upgrade), but actually, if you
use link mode, the user files are the only files with a hard link count
of 2. I could create a script that copied from the master to the slave
only those files with a link count of one.
--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com
+ It's impossible for everything to be true. +
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