From owner-freebsd-net@FreeBSD.ORG Mon Apr 4 19:05:23 2011 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id AFB441065676 for ; Mon, 4 Apr 2011 19:05:23 +0000 (UTC) (envelope-from cswiger@mac.com) Received: from asmtpout019.mac.com (asmtpout019.mac.com [17.148.16.94]) by mx1.freebsd.org (Postfix) with ESMTP id 95C878FC12 for ; Mon, 4 Apr 2011 19:05:23 +0000 (UTC) MIME-version: 1.0 Content-transfer-encoding: 7BIT Content-type: text/plain; CHARSET=US-ASCII Received: from cswiger1.apple.com ([17.209.4.71]) by asmtp019.mac.com (Oracle Communications Messaging Exchange Server 7u4-20.01 64bit (built Nov 21 2010)) with ESMTPSA id <0LJ500A5O6CTAX30@asmtp019.mac.com> for freebsd-net@freebsd.org; Mon, 04 Apr 2011 12:05:17 -0700 (PDT) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:5.2.15,1.0.148,0.0.0000 definitions=2011-04-04_05:2011-04-04, 2011-04-04, 1970-01-01 signatures=0 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 ipscore=0 suspectscore=0 phishscore=0 bulkscore=1 adultscore=0 classifier=spam adjust=0 reason=mlx engine=6.0.2-1012030000 definitions=main-1104040098 From: Chuck Swiger In-reply-to: Date: Mon, 04 Apr 2011 12:05:17 -0700 Message-id: References: <0F56F33B-C492-4723-B7EC-713AD64E856C@mac.com> To: "Marc G. Fournier" X-Mailer: Apple Mail (2.1084) Cc: freebsd-net@freebsd.org Subject: Re: 7-STABLE NFS: fatal: "select lock: Permission denied" X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 04 Apr 2011 19:05:23 -0000 On Apr 4, 2011, at 11:58 AM, Marc G. Fournier wrote: >> Be careful; multiple access from different processes even on a single host can still run into locking issues against NFS filesystems, or data corruption if locking isn't available. You're most at risk with local delivery to an mbox-style INBOX; delivery to maildir-style INBOX is much safer even on NFS without locking. > > In my case, I have postfix+cyrus-imapd ... OK-- Cyrus IMAP uses a variant of maildir, so you're relatively safe even if locking is not available. Regards, -- -Chuck