Re: Survey on backing up unlogged tables: help us with PostgreSQL development!

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: "Marc Mamin" <M(dot)Mamin(at)intershop(dot)de>
Cc: "PostgreSQL general" <pgsql-general(at)postgresql(dot)org>, "Josh Berkus" <josh(at)agliodbs(dot)com>
Subject: Re: Survey on backing up unlogged tables: help us with PostgreSQL development!
Date: 2010-11-17 22:39:56
Message-ID: 25717.1290033596@sss.pgh.pa.us
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"Marc Mamin" <M(dot)Mamin(at)intershop(dot)de> writes:
> Will it be possible to switch from unlogged to logged ?

Probably not, because it would completely confuse hot standby slaves
(or anything else looking at the WAL replay stream). You can't just
start issuing WAL records against an already-built table or index,
because the WAL entries are deltas.

regards, tom lane

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