From: Bernd Eckenfels <ecki@lina.inka.de>
To: linux-kernel@vger.kernel.org
Subject: Re: [ANNOUNCE] Ramback: faster than a speeding bullet
Organization: Private Site running Debian GNU/Linux
In-Reply-To: <200803151417.13899.phillips@phunq.net>
User-Agent: tin/1.7.8-20050315 ("Scalpay") (UNIX) (Linux/2.6.13.4 (i686))
Message-Id: <E1JafeR-0007m1-00@calista.eckenfels.net>
Date: Sun, 16 Mar 2008 00:18:55 +0100
Sender: linux-kernel-owner@vger.kernel.org
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In article <200803151417.13899.phillips@phunq.net> you wrote:
>> RAID controllers do not have half a terabyte of RAM.
> 
> And?  Either you have battery backed ram with critical data in it or
> you do not.  Exactly how much makes little difference to the question.

Besides, some SAN Storage Devices do have that amount of Ram. However it is
better protected as in your typical PC. With Mirroring, it can be removed
(including the battery packs) - and there is a procedure to actually replay
the buffers once the new devices are in place.

But thats not an argument against or in favor of Ramback, its just two
different things. You would be suprised how many databases run on write back
mode disks without fdsync() any nobody cares :)

Greetings
Bernd
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