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Re: DRDB?

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: "Magnus Hagander" <mha(at)sollentuna(dot)net>
Cc: "Bruce Momjian" <pgman(at)candle(dot)pha(dot)pa(dot)us>,"Martin Fandel" <martin(dot)fandel(at)alphyra-evs(dot)de>,pgsql-admin(at)postgresql(dot)org
Subject: Re: DRDB?
Date: 2005-06-27 14:51:22
Message-ID: 7211.1119883882@sss.pgh.pa.us (view raw or flat)
Thread:
Lists: pgsql-admin
"Magnus Hagander" <mha(at)sollentuna(dot)net> writes:
>> I have not probed further than the site's top page, but 
>> unless DRBD offers some pretty strong guarantees about 
>> physical write order on the master being duplicated on the 
>> slave, it won't work reliably for Postgres.

> From what I've heard, it does guarantee this. I think it requires you to
> put all your stuff on the same DRBD device (no special device for WAL).

That would seem pretty likely --- I don't see how a block-level driver
could synchronize operations occuring on different devices.

			regards, tom lane

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  • Re: DRDB? at 2005-06-27 14:39:33 from Magnus Hagander

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