From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261301AbTDKRqP (for ); Fri, 11 Apr 2003 13:46:15 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261300AbTDKRqP (for ); Fri, 11 Apr 2003 13:46:15 -0400 Received: from inet-mail4.oracle.com ([148.87.2.204]:62889 "EHLO inet-mail4.oracle.com") by vger.kernel.org with ESMTP id S261246AbTDKRqN (for ); Fri, 11 Apr 2003 13:46:13 -0400 Date: Fri, 11 Apr 2003 10:57:37 -0700 From: Joel Becker To: Badari Pulavarty Cc: Giuliano Pochini , linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [patch for playing] Patch to support 4000 disks and maintain Message-ID: <20030411175736.GY31739@ca-server1.us.oracle.com> References: <200304101339.49895.pbadari@us.ibm.com> <20030411154450.GW31739@ca-server1.us.oracle.com> <200304110928.32978.pbadari@us.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200304110928.32978.pbadari@us.ibm.com> X-Burt-Line: Trees are cool. User-Agent: Mutt/1.5.4i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Apr 11, 2003 at 08:28:32AM -0800, Badari Pulavarty wrote: > Well !! My patch does not have anything hardcoded to 4000. > Depends on how many minor bits. But we have to put a hardlimit > somewhere .. Yes, but that hardlimit has to expect the number to be Very Large in the very near future. 16K disks on a big compute farm is not too far off. > Fortunately, the multipath solution Mike Anderson & Patrick Mansfield > working on, colapses all the disks you see thro multiple paths into > number of realdisks (4000). So you don't really need extra devices > to support multipathing. Yes, but what if I want to see the multiple paths? Does their solution allow you to specify the path behind the 'realdisk'? Does it allow querying of the paths? Joel -- Life's Little Instruction Book #451 "Don't be afraid to say, 'I'm sorry.'" Joel Becker Senior Member of Technical Staff Oracle Corporation E-mail: joel.becker@oracle.com Phone: (650) 506-8127