From owner-freebsd-scsi Tue Jul 31 10: 6:56 2001 Delivered-To: freebsd-scsi@freebsd.org Received: from aslan.scsiguy.com (aslan.scsiguy.com [63.229.232.106]) by hub.freebsd.org (Postfix) with ESMTP id C84AC37B405 for ; Tue, 31 Jul 2001 10:06:53 -0700 (PDT) (envelope-from gibbs@scsiguy.com) Received: from scsiguy.com (localhost [127.0.0.1]) by aslan.scsiguy.com (8.11.4/8.9.3) with ESMTP id f6VH6kI34994; Tue, 31 Jul 2001 11:06:46 -0600 (MDT) (envelope-from gibbs@scsiguy.com) Message-Id: <200107311706.f6VH6kI34994@aslan.scsiguy.com> To: mjacob@feral.com Cc: "Jose M. Alcaide" , scsi@FreeBSD.ORG Subject: Re: DLT 4000 throughput and cstream In-Reply-To: Your message of "Sun, 29 Jul 2001 17:36:15 PDT." <20010729173112.C44279-100000@wonky.feral.com> Date: Tue, 31 Jul 2001 11:06:46 -0600 From: "Justin T. Gibbs" Sender: owner-freebsd-scsi@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org >It does indeed look like this *might* be a dump issue- but it also could >simply be that any single threaded action for dump(8) is going to make for >lousy performance. Dump has lots of issues. I once talked with John Polstra about fixing it. The scheme we talked about would have increased dumps performance by ~10X. Unfortunately the funding for that project (at my former employer) dried up. -- Justin To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message