From owner-freebsd-stable@FreeBSD.ORG Fri Sep 12 08:19:00 2014 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 9E586D9C for ; Fri, 12 Sep 2014 08:19:00 +0000 (UTC) Received: from smtp1.multiplay.co.uk (smtp1.multiplay.co.uk [85.236.96.35]) by mx1.freebsd.org (Postfix) with ESMTP id 52A3BB8E for ; Fri, 12 Sep 2014 08:18:57 +0000 (UTC) Received: by smtp1.multiplay.co.uk (Postfix, from userid 65534) id 7EB2220E70890; Fri, 12 Sep 2014 08:18:56 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on smtp1.multiplay.co.uk X-Spam-Level: ** X-Spam-Status: No, score=2.2 required=8.0 tests=AWL,BAYES_00,DOS_OE_TO_MX, FSL_HELO_NON_FQDN_1,RDNS_DYNAMIC,STOX_REPLY_TYPE autolearn=no version=3.3.1 Received: from r2d2 (82-69-141-170.dsl.in-addr.zen.co.uk [82.69.141.170]) by smtp1.multiplay.co.uk (Postfix) with ESMTPS id BF96920E7088D; Fri, 12 Sep 2014 08:18:54 +0000 (UTC) Message-ID: From: "Steven Hartland" To: "Shane Ambler" , References: <7F008C560B48412AB66A1EBD9382DDAE@multiplay.co.uk> <9315C209-701A-49EF-85D3-ACCCD1513EC3@icloud.com> <959C54D2C8EB4AC8983DC1DA3CE042E3@multiplay.co.uk> <9F24DD48FBEA46C39F98DF600D46DA1A@multiplay.co.uk> <4450778127F4407EB6566A0FE11CD651@multiplay.co.uk> <090135D4-8B1F-42B4-82FC-6FD2F1DBDDA8@icloud.com> <20140911071233.GA50585@anubis.morrow.me.uk> <541280D8.9090500@ShaneWare.Biz> Subject: Re: Snapshots that won't delete [was: Re: ZFS on root booting...] Date: Fri, 12 Sep 2014 09:19:03 +0100 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5931 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.6157 X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 12 Sep 2014 08:19:00 -0000 Is there a hold on the snapshot? ----- Original Message ----- From: "Shane Ambler" > On 11/09/2014 16:42, Ben Morrow wrote: >> Quoth Adam McDougall : >>> >>> Were you running a newer kernel with an older format zpool? I heard >>> ixsystems had customers doing that and ran into corruption when they >>> tried to modify the zpool in some way (expand? I don't remember). >>> http://www.bsdnow.tv/episodes/2014_07_09-zfs_war_stories >> >> Oh! Might this be what's causing a problem I've been meaning to ask >> about? >> >> My desktop at home is running (a patched, but not anywhere to do with >> ZFS) 10-STABLE from a while ago, with a zpool that was created under >> 8.2-R and is still at version 15. I have been deliberately not upgrading >> it, because I saw no reason to and it seemed safer to leave things as >> they were. >> >> Recently, though, my dump script has started having occasional problems >> with snapshots that won't delete. Pending further investigation I have >> been renaming them to allow the recursive delete to succeed, and (so >> far) rebooting has always made it possible to get rid of them. > > I have seen that issue with 9.2 and at least one other person mentioned > it as well. I currently have a snapshot that I accessed at least 3 weeks > ago and renamed to keep rotations working and have not accessed since, > it still won't delete as it is busy. I can only delete these snapshots > after a reboot. > > The only cause I know is accessing the snapshot. > I can simply ls .zfs/snapshot/daily.01/somefolder to prevent it being > deleted. With a manual zfs destroy I get "dataset is busy" and have not > found a way to find any process that has hold of it. > > It seems that some aging of the snapshot needs to happen. Testing a > rotate, access, rotate keeps working ok, but access last nights > snapshot and then rotate and it blocks. > > I'm fairly sure that I was running 9.1 when I created this zpool and > then later upgraded to 9.2. zpool upgrade says "This system supports > ZFS pool feature flags" and "Pool 'zrpleader' already has all supported > features enabled". > > -- > FreeBSD - the place to B...Serving Data > > Shane Ambler > > _______________________________________________ > freebsd-stable@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org" >