From owner-freebsd-current Thu Apr 27 13: 9: 9 2000 Delivered-To: freebsd-current@freebsd.org Received: from morpheus.skynet.be (morpheus.skynet.be [195.238.2.39]) by hub.freebsd.org (Postfix) with ESMTP id 7516C37B993; Thu, 27 Apr 2000 13:09:03 -0700 (PDT) (envelope-from blk@skynet.be) Received: from [194.78.235.98] (dialup1890.brussels.skynet.be [194.78.235.98]) by morpheus.skynet.be (Postfix) with ESMTP id F33A6DB04; Thu, 27 Apr 2000 22:08:57 +0200 (MET DST) Mime-Version: 1.0 X-Sender: blk@pop.skynet.be Message-Id: In-Reply-To: <200004271716.KAA08417@mass.cdrom.com> References: <200004271716.KAA08417@mass.cdrom.com> Date: Thu, 27 Apr 2000 21:57:37 +0200 To: Mike Smith From: Brad Knowles Subject: Re: Support for large mfs Cc: Matthew Dillon , "John W. DeBoskey" , freebsd-current@FreeBSD.ORG Content-Type: text/plain; charset="us-ascii" ; format="flowed" Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG At 10:16 AM -0700 2000/4/27, Mike Smith wrote: > I would consider 4.0, several (three or four) strings of LVD disks and > either a Mylex eXtremeRAID 1100 (64MB or more) or an AMI MegaRAID > Enterprise 1500. (The 1600 should probably work too, but I haven't seen > one yet so I can't be sure.) And definitely softupdates. That would be for a spool server, but a news peering server shouldn't need that many disks. I was planning on doing four 10kRPM/18GB disks with a small RAID 0+1 partition for /usr/news/history (and a separate one for the /usr/news/spool), but four separate filesystems mounted under /usr/news/spool/news, and doing it all with vinum. I figure if I lose a single disk, 1/4 of the spool will be toast but /usr/news/history and /usr/news/spool will still be okay (albeit reduced in performance), and vinum should be quite fast enough for what will be asked of it. > Note that you can't put more than 8 disks into an array with the Mylex > controller (easily), so you'd still want to use ccd or vinum over the top. I'm doing that now on our news spool server, for similar reasons -- it can't make simultaneous use of more than five disks in a LUN, and can't do its own striping across LUNs. In fact, I'd be extremely interested to know if you can build a Mylex or AMI RAID configuration that is optimized for random read performance that can perform on the same sort of levels as the 1.8TB news spool server that Joe Greco built (and reported on in news.software.nntp), the solid-state disk that Terry Kennedy has on his news peering server (and reported on in news.software.nntp), or the news spool server I've built (and reported on in news.software.nntp ;-). -- These are my opinions -- not to be taken as official Skynet policy ====================================================================== Brad Knowles, || 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 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message