Date: Fri, 27 May 2005 00:00:42 -0400 (EDT) From: Andre Guibert de Bruet <andy@siliconlandmark.com> To: Scott Long <scottl@samsco.org> Cc: FreeBSD Current <freebsd-current@freebsd.org> Subject: Re: Disable read/write caching to disk? Message-ID: <20050526235852.M54386@lexi.siliconlandmark.com> In-Reply-To: <4296997C.9030700@samsco.org> References: <4295D51F.50106@centtech.com> <429606D9.6080602@cs.tu-berlin.de> <42960ACB.7090801@cs.tu-berlin.de> <42960CFE.4060307@centtech.com> <42960F8F.2050109@samsco.org> <42961195.30608@centtech.com> <429613FB.80100@samsco.org> <42968AD4.3020603@centtech.com> <A70C5E4F-D9F9-4756-8AC2-591462E338DE@shire.net> <4296997C.9030700@samsco.org>
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On Thu, 26 May 2005, Scott Long wrote: > Chad Leigh -- Shire.Net LLC wrote: >> On May 26, 2005, at 8:49 PM, Eric Anderson wrote: >>> So it sounds dangerous, but not disastrous.. Sounds like soft- updates >>> would help this alot, so I'll turn them back on for this filesystem (I >>> typically do use it). >>> >>> At a minimum, it would be awesome to even have a way to do one host rw >>> and several doing ro. Think of the case of a web server farm, where it's >>> nearly all reads. >> >> use NFS or something. Not ideal but it allows you to have lots of clients >> using the same space without the disasters. > > NFS and Coda/AFS require that you have an intelligent node, i.e. a > computer, in front of each disk. The whole idea of a Fibre Channel > or iSCSI SAN is that you have a network of disks connected to a network > of computers, all able to communicate with each other and not have to > be fronted by a computer. This is quite important for high-availability > storage networks that want the reliability and scalability of not having > a single computer be the choke point or single-point-of-failure for a > particular set of data. Granted it's still somewhat of a niche, but as > persistent storage and data mining become more part of the mainstream, > it'll start becoming very important. Right now FreeBSD simply isn't an > option, while Solaris, NT, and Linux are. Fair enough. So the question becomes: What are the Linux folks doing that we aren't and how? Andy /* Andre Guibert de Bruet * 6f43 6564 7020 656f 2e74 4220 7469 6a20 */ /* Code poet / Sysadmin * 636f 656b 2e79 5320 7379 6461 696d 2e6e */ /* GSM: +1 734 846 8758 * 5520 494e 2058 6c73 7565 6874 002e 0000 */ /* WWW: siliconlandmark.com * Tormenting bytes since 1980. */
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