Re: Some thoughts about multi-server sync rep configurations

From: Craig Ringer <craig(at)2ndquadrant(dot)com>
To: Thomas Munro <thomas(dot)munro(at)enterprisedb(dot)com>
Cc: Pg Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Some thoughts about multi-server sync rep configurations
Date: 2016-12-28 03:21:19
Message-ID: CAMsr+YG2u4FZC6QyYj5bz3Yq_jRWior_xcw1krhcKAAj5D5EGg@mail.gmail.com
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On 28 December 2016 at 08:14, Thomas Munro
<thomas(dot)munro(at)enterprisedb(dot)com> wrote:

> 3. No server must allow a transaction to be visible that hasn't been
> flushed on N standby servers. We already prevent that on the primary

Only if the primary doesn't restart. We don't persist the xact masking
used by sync rep at the moment.

I suspect that solving that is probably tied to solving it on standbys.

--
Craig Ringer http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services

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