From: | Colin Smith <colin(at)yelm(dot)freeserve(dot)co(dot)uk> |
---|---|
To: | Colin(dot)Smith(at)yelm(dot)freeserve(dot)co(dot)uk |
Cc: | pgsql-general(at)postgresql(dot)org |
Subject: | Re: Parallel databases? |
Date: | 2000-04-15 13:09:16 |
Message-ID: | Pine.LNX.4.10.10004151350400.1791-100000@Orlanth.homenetwork |
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Thread: | |
Lists: | pgsql-general |
On Sat, 15 Apr 2000, Colin Smith wrote:
> On Fri, 14 Apr 2000, A James Lewis wrote:
>
> >
> > Does anyone have any suggestions for a way to keep 2 databases in sync?
> >
> > Ideally updates need to be made to both... this can't be too uncommon a
> > requirement..... any kind of HA would need it....
I've had a closer look at drbd. The home site is:
http://www.complang.tuwien.ac.at/reisner/drbd/
It will replicate the blocks on a device out to backup servers. If the
primary system fails the backup can take over. It doesn't do any
distributed locking so it's strictly a failover service at the moment.
It also looks like a real performance killer which is pretty much what
you'd expect with each block being sent over the LAN as well as to disk.
Definitely a case for a very high bandwidth low latency network (SCI, SP
switch) 100Mbit/1Gbit dedicated might be acceptable though.
--
|Colin Smith: Colin(dot)Smith(at)yelm(dot)freeserve(dot)co(dot)uk | Windows 2000 |
|Linux: Delivers on the promises Microsoft make. | AKA |
| http://www.linux.org/ | The W2K Bug |
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