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Message-Id: <200803131202.48135.phillips@phunq.net>
Date: Thu, 13 Mar 2008 11:02:47 -0800
From: Daniel Phillips <phillips@...nq.net>
To: ric@....com
Cc: Lars Marowsky-Bree <lmb@...e.de>,
Alan Cox <alan@...rguk.ukuu.org.uk>,
Grzegorz Kulewski <kangur@...com.net>,
linux-kernel@...r.kernel.org
Subject: Re: [ANNOUNCE] Ramback: faster than a speeding bullet
On Thursday 13 March 2008 06:27, Ric Wheeler wrote:
> >>> So "perfectly reliable if UPS power does not fail" seems a bit over the
> >>> top.
> >> It works for EMC :-)
> >
> > Where they control the hardware and run a rather specialized OS as well,
> > not a general purpose system like Linux on "commodity" hardware ;-)
>
> Actually, in Centera we use generic hardware with a fairly normal kernel
> which has strategic backports from upstream (libata, nic drivers, etc).
>
> No UPS in the picture. Data integrity is protected by working with the
> application team to insure they understand when data is safely on the
> disk platter and working with IO & FS people to try and make sure we
> don't lie to them (too much ) about that promise.
>
> The centera boxes are tested with power failure & error injection and by
> all of our customers in all those ways customers do ;-)
Hi Ric,
Right, so Linux has gotten to the point where it competes with purpose-
built embedded software in reliability. Not quite there, but close
enough for mission-critical.
I was not thinking of Centera when I mentioned the UPS though...
Daniel
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