From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeremy Higdon Subject: Re: [RFC] Make the SCSI mempool allocations variable Date: Wed, 10 Mar 2004 22:38:05 -0800 Sender: linux-scsi-owner@vger.kernel.org Message-ID: <20040311063805.GM618504@sgi.com> References: <1078858977.1756.40.camel@mulgrave> <20040310100740.GA619810@sgi.com> <1078932577.10834.44.camel@mulgrave> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from mtvcafw.SGI.COM ([192.48.171.6]:32063 "EHLO zok.sgi.com") by vger.kernel.org with ESMTP id S261603AbUCKGiq (ORCPT ); Thu, 11 Mar 2004 01:38:46 -0500 Content-Disposition: inline In-Reply-To: <1078932577.10834.44.camel@mulgrave> List-Id: linux-scsi@vger.kernel.org To: James Bottomley Cc: mpm@waste.org, SCSI Mailing List On Wed, Mar 10, 2004 at 10:29:36AM -0500, James Bottomley wrote: > > The best course of action is probably to put the patch in (since it has > its current default at 128, it will change nothing) so that people who > wish to play with increasing the allocation can. > > To address the question of how you set this, I'd like more information > about which filesystems and workloads find this useful, perhaps with a > view to tying it to an indirect config option (CONFIG_ENTERPRISE or > something). > > James Most of our users that would benefit from this would fall into the "HPC" segment. HPC meaning High Performance Computing. That's probably not very descriptive. There is typically a lot of floating point and large data sets. There may be a database involved, but it's not traditional commercial transaction processing, which typically has very small I/O requests. Other users would be Broadcast, where they stream A/V streams to/from a RAID device. There are also sites that store large amounts of data keeping track of things (people/places/etc.), looking for things, etc. Maybe CONFIG_HPC or CONFIG_HIGH_BANDWIDTH_IO. The longer and clumsier the name, the more descriptive. :-) Filesystems? Is there anything other than XFS? :-) :-) jeremy