From owner-freebsd-fs@FreeBSD.ORG Wed Mar 8 23:55:22 2006 Return-Path: X-Original-To: freebsd-fs@freebsd.org Delivered-To: freebsd-fs@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 6E87616A420 for ; Wed, 8 Mar 2006 23:55:22 +0000 (GMT) (envelope-from john@kozubik.com) Received: from kozubik.com (kozubik.com [69.43.165.2]) by mx1.FreeBSD.org (Postfix) with ESMTP id 1889943D46 for ; Wed, 8 Mar 2006 23:55:22 +0000 (GMT) (envelope-from john@kozubik.com) Received: from kozubik.com (localhost [127.0.0.1]) by kozubik.com (8.12.11/8.12.11) with ESMTP id k28NtNq3037338 for ; Wed, 8 Mar 2006 15:55:23 -0800 (PST) (envelope-from john@kozubik.com) Received: from localhost (john@localhost) by kozubik.com (8.12.11/8.12.11/Submit) with ESMTP id k28NtNc8037335 for ; Wed, 8 Mar 2006 15:55:23 -0800 (PST) (envelope-from john@kozubik.com) Date: Wed, 8 Mar 2006 15:55:23 -0800 (PST) From: John Kozubik To: freebsd-fs@freebsd.org Message-ID: <20060308151738.L55438@kozubik.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Subject: UFS2 snapshots - comments requested X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 08 Mar 2006 23:55:22 -0000 I just hung up a completely idle 6.0-RELEASE system by deleting a large number of files on a snapshotted filesystem (it had seven snapshots running on it). I have never seen snapshots work reliably in FreeBSD. I suspect that if you are using snapshots and they seem reliable, it is because you aren't doing much with them, or running enough of them. Since the first of the year, I have submitted two PRs detailing erratic behavior with snapshots: kern/92272 kern/92292 and these PRs only represent the behavior that I could isolate and define - I am regularly seeing system hangs resulting from any number of seemingly innocuous activities. My questions: - is this instability (circa 6.0) acknowledged ? - is there a large, known problem that, when fixed, will cause all of these little problems to go away, or should I keep submitting PRs when I verify misc. problems ? - can any visibility be offered as to the possible future viability of UFS2 snapshots in 6.0 ? Many thanks. ----- John Kozubik - john@kozubik.com - http://www.kozubik.com