Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Mon, 8 Oct 2001 17:17:18 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Mon, 8 Oct 2001 17:17:09 -0400 Received: from frank.gwc.org.uk ([212.240.16.7]:26127 "EHLO frank.gwc.org.uk") by vger.kernel.org with ESMTP id ; Mon, 8 Oct 2001 17:16:56 -0400 Date: Mon, 8 Oct 2001 22:17:21 +0100 (BST) From: Alistair Riddell To: raid@ddx.a2000.nu cc: linux-kernel@vger.kernel.org, linux-raid@vger.kernel.org Subject: Re: write/read cache raid5 In-Reply-To: Message-ID: X-foo: bar MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 8 Oct 2001 raid@ddx.a2000.nu wrote: > So there is no way i can Speedup write to the raid5 array ? > (memory will be ecc and the server will be on ups) Your disks go as fast as they go, that is a physical limitation. More RAM means your server can store up data blocks to be written when the disks are less busy. But the data still has to be written to disk sometime. More RAM will certainly help by caching reads though. 6 disks raided together means the bottleneck will likely be your network, unless your server is on gigabit ethernet and has a ton of clients and/or gigabit to the desktop. -- Alistair Riddell - BOFH IT Manager, George Watson's College, Edinburgh Tel: +44 131 447 7931 Ext 176 Fax: +44 131 452 8594 Microsoft - because god hates us - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/