| 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 |
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| 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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