From: Achilleas Mantzios <achill@matrix.gatewaynet.com>
To: pgsql-performance@postgresql.org
Subject: Re: Background fsck
Date: Fri, 8 Apr 2011 08:19:42 +0200
Message-ID: <201104080919.43152.achill@matrix.gatewaynet.com> (raw)
In-Reply-To: <4D9EA367.7060102@wp.pl>
References: <4D9CEA3F.5050603@wp.pl>
<201104071701.02647.achill@matrix.gatewaynet.com>
<4D9EA367.7060102@wp.pl>
Στις Friday 08 April 2011 08:55:51 ο/η Ireneusz Pluta έγραψε:
> Achilleas Mantzios wrote:
> >
> > In anyway, having FreeBSD to fsck, (background or not) should not happen. And the problem
> > becomes bigger when cheap SATA drives will cheat about their write cache being flushed to the disk.
> > So in the common case with cheap hardware, it is wise to have a UPS connected and being monitored
> > by the system.
> >
>
> It's not lack of UPS. Power issues are taken care of here. It's a buggy 3ware controller which hangs
> the machine ocassionally and the only way to have it come back is to power cycle, hard reset is not
> enough.
What has happened to me (as Greg mentioned) is that repeatedly interrupted background fscks (having the system
crash while background fsck was executing) might result in a seriously damaged fs.
Add to this, the possible overhead by rebuilding software raid (gmirror) at the same time,
and the situation becomes more complicated.
So its better to replace/fix/remove this buggy controller, before anything else.
>
>
--
Achilleas Mantzios
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To: pgsql-performance@postgresql.org
Cc: achill@matrix.gatewaynet.com
Subject: Re: Background fsck
In-Reply-To: <201104080919.43152.achill@matrix.gatewaynet.com>
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