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Date:      Thu, 4 May 2000 22:11:59 +0200
From:      Brad Knowles <blk@skynet.be>
To:        vallo@matti.ee, Mike Smith <msmith@FreeBSD.ORG>
Cc:        Parag Patel <parag@cgt.com>, freebsd-stable@FreeBSD.ORG
Subject:   Re: How good is AMI MegaRAID support?
Message-ID:  <v0422081db537899d3de7@[195.238.1.121]>
In-Reply-To: <20000504214714.A10267@myhakas.matti.ee>
References:  <20000504210635.A8681@myhakas.matti.ee> <200005041922.MAA01426@mass.cdrom.com> <20000504214714.A10267@myhakas.matti.ee>

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At 9:47 PM +0200 2000/5/4, Vallo Kallaste wrote:

>  Exactly, but I always think that big systems are for big work and are
>  always near to saturation on peak hours and the likelyhood of disk
>  failures and degraded mode is in the same timeslot.

	It's been my experience that the one thing I've always got on any 
of the servers I run is plenty of spare CPU time, even if everything 
else is maxxed-out.

	Thus, the very minimal overhead of vinum would not be an issue 
(even on my most heavily used systems, I haven't been able to measure 
the amount of additional workload it adds), although the greater I/O 
bandwidth and latency involved in directly writing parity 
information, etc... would be.

--
   These are my opinions -- not to be taken as official Skynet policy
======================================================================
Brad Knowles, <blk@skynet.be>                || Belgacom Skynet SA/NV
Systems Architect, Mail/News/FTP/Proxy Admin || Rue Colonel Bourg, 124
Phone/Fax: +32-2-706.13.11/12.49             || B-1140 Brussels
http://www.skynet.be                         || Belgium


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