From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dave Chinner Subject: Re: Thin provisioning & arrays Date: Wed, 12 Nov 2008 10:08:52 +1100 Message-ID: <20081111230852.GM2373@disturbed> References: <28572.1226369378@ocs10w> <49198FC3.7080301@redhat.com> <49199CFF.8080002@hp.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Ric Wheeler , Keith Owens , Black_David@emc.com, dwmw2@infradead.org, martin.petersen@oracle.com, chris.mason@oracle.com, jens.axboe@oracle.com, James.Bottomley@hansenpartnership.com, linux-scsi@vger.kernel.org, linux-fsdevel@vger.kernel.org, coughlan@redhat.com, matthew@wil.cx To: jim owens Return-path: Content-Disposition: inline In-Reply-To: <49199CFF.8080002@hp.com> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-fsdevel.vger.kernel.org On Tue, Nov 11, 2008 at 09:55:59AM -0500, jim owens wrote: > Ric Wheeler wrote: >> Thing is being pitched to answer a very specific customer use case - >> shared storage (mid to high end almost exclusively) with several >> different users and applications.... ... > It is up to the customer to manage their storage so it never > reaches the unable-to-write state. Sure, but putting the entire management burden of obtaining and running defrag tools in every one of their large set of OS's is the wrong approach. We can and should be designing new functionality for the data center in such a manner that does not require large scale manual intervention to maintain the systems. Your customers won't thank you for solving the thin provisioning management problem by requiring them to do extra hand-holding.... Cheers, Dave. -- Dave Chinner david@fromorbit.com