From: Bruno Wolff III <bruno@wolff.to>
To: Luke Lonergan <LLonergan@greenplum.com>
Cc: David Lang <dlang@invendra.net>
Cc: Frank Wiles <frank@wiles.org>
Cc: Juan Casero <caseroj@comcast.net>
Cc: pgsql-performance@postgresql.org
Subject: Re: What's the best hardver for PostgreSQL 8.1?
Date: Sun, 25 Dec 2005 09:15:43 -0600
Message-ID: <20051225151543.GB11637@wolff.to> (raw)
In-Reply-To: <3E37B936B592014B978C4415F90D662D01F47552@MI8NYCMAIL06.Mi8.com>
References: <3E37B936B592014B978C4415F90D662D01F1B59F@MI8NYCMAIL06.Mi8.com>
<Pine.LNX.4.62.0512241859190.2807@qnivq.ynat.uz>
<3E37B936B592014B978C4415F90D662D01F47552@MI8NYCMAIL06.Mi8.com>
On Sat, Dec 24, 2005 at 22:13:43 -0500,
Luke Lonergan <LLonergan@greenplum.com> wrote:
> David,
>
> > now hot-swap may not be supported on all interface types, that may be what
> > you have run into, but with SCSI or SATA you should be able to hot-swap
> > with the right controller.
>
> That's actually the problem - Linux hot swap is virtually non-functional for SCSI. You can write into the proper places in /proc, then remove and rescan to get a new drive up, but I've found that the resulting OS state is flaky. This is true of the latest 2.6 kernels and LSI and Adaptec SCSI controllers.
>
> The problems I've seen are with Linux, not the controllers.
The other option is to keep hot spares available so that you can have a failure
or two before you have to pull drives out. This might allow you to get to a
maintenance window to swap out the bad drives.
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To: pgsql-performance@postgresql.org
Cc: bruno@wolff.to, LLonergan@greenplum.com, dlang@invendra.net, frank@wiles.org, caseroj@comcast.net
Subject: Re: What's the best hardver for PostgreSQL 8.1?
In-Reply-To: <20051225151543.GB11637@wolff.to>
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