From owner-freebsd-fs@FreeBSD.ORG Wed Jun 20 17:02:27 2007 Return-Path: X-Original-To: freebsd-fs@freebsd.org Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 6139F16A469 for ; Wed, 20 Jun 2007 17:02:27 +0000 (UTC) (envelope-from kostikbel@gmail.com) Received: from relay01.kiev.sovam.com (relay01.kiev.sovam.com [62.64.120.200]) by mx1.freebsd.org (Postfix) with ESMTP id D312713C46C for ; Wed, 20 Jun 2007 17:02:26 +0000 (UTC) (envelope-from kostikbel@gmail.com) Received: from [89.162.146.170] (helo=skuns.kiev.zoral.com.ua) by relay01.kiev.sovam.com with esmtps (TLSv1:AES256-SHA:256) (Exim 4.67) (envelope-from ) id 1I13ZW-000LaP-T8 for freebsd-fs@freebsd.org; Wed, 20 Jun 2007 20:02:26 +0300 Received: from deviant.kiev.zoral.com.ua (root@deviant.kiev.zoral.com.ua [10.1.1.148]) by skuns.kiev.zoral.com.ua (8.14.1/8.14.1) with ESMTP id l5KH26Hr041992 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Wed, 20 Jun 2007 20:02:06 +0300 (EEST) (envelope-from kostikbel@gmail.com) Received: from deviant.kiev.zoral.com.ua (kostik@localhost [127.0.0.1]) by deviant.kiev.zoral.com.ua (8.14.1/8.14.1) with ESMTP id l5KH2CBM081687; Wed, 20 Jun 2007 20:02:12 +0300 (EEST) (envelope-from kostikbel@gmail.com) Received: (from kostik@localhost) by deviant.kiev.zoral.com.ua (8.14.1/8.14.1/Submit) id l5KH29Vf081686; Wed, 20 Jun 2007 20:02:09 +0300 (EEST) (envelope-from kostikbel@gmail.com) X-Authentication-Warning: deviant.kiev.zoral.com.ua: kostik set sender to kostikbel@gmail.com using -f Date: Wed, 20 Jun 2007 20:02:09 +0300 From: Kostik Belousov To: Espen Skoglund Message-ID: <20070620170209.GY2268@deviant.kiev.zoral.com.ua> References: <18041.21810.297355.202403@gargle.gargle.HOWL> <20070620165746.GX2268@deviant.kiev.zoral.com.ua> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="QfPW8fNxh+WKMpMU" Content-Disposition: inline In-Reply-To: <20070620165746.GX2268@deviant.kiev.zoral.com.ua> User-Agent: Mutt/1.4.2.2i X-Virus-Scanned: ClamAV version 0.90.2, clamav-milter version 0.90.2 on skuns.kiev.zoral.com.ua X-Virus-Status: Clean X-Spam-Status: No, score=-1.4 required=5.0 tests=ALL_TRUSTED autolearn=failed version=3.1.8 X-Spam-Checker-Version: SpamAssassin 3.1.8 (2007-02-13) on skuns.kiev.zoral.com.ua X-Scanner-Signature: 5e2df25549de819b25d1bfd51e9f52eb X-DrWeb-checked: yes X-SpamTest-Envelope-From: kostikbel@gmail.com X-SpamTest-Group-ID: 00000000 X-SpamTest-Header: Not Detected X-SpamTest-Info: Profiles 1162 [June 20 2007] X-SpamTest-Info: helo_type=3 X-SpamTest-Method: none X-SpamTest-Rate: 0 X-SpamTest-Status: Not detected X-SpamTest-Status-Extended: not_detected X-SpamTest-Version: SMTP-Filter Version 3.0.0 [0255], KAS30/Release Cc: freebsd-fs@freebsd.org Subject: Re: Snapshot usage guidelines (to avoid stability issues) 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, 20 Jun 2007 17:02:27 -0000 --QfPW8fNxh+WKMpMU Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Jun 20, 2007 at 07:57:46PM +0300, Kostik Belousov wrote: > On Wed, Jun 20, 2007 at 06:26:26PM +0200, Espen Skoglund wrote: > > Hi, > >=20 > > A couple of days ago I decided to start using snapshots on my system. > > Knowing that the functionality has been available for quite some time > > now I (apparently wrongly) assumed that it was ready for production > > use. My bad. > >=20 > > My system, a 6-STABLE from week and a half ago, uses two 250GB > > gstriped disks and has about 4-5 snapshots on one 215GB UFS partiton. > > This morning I learned that things had gone terribly wrong during some > > nightly cronjobs, hanging the whole system. Suspecting that snapshots > > were the culprit I soon learned after some investigation that the > > snapshot functionality wasn't nearly as stable as I had hoped for. > >=20 > > Looking at PRs and mailing lists there seems to be mainly two > > outstanding stability issues with snapshots: a) snapshotted fs running > > full, and b) deleting large amount of files on an fs with multiple > > snapshots. The former issue, while certainly annoying, one could be > > able to work around. The latter issue, on the other hand, seems more > > like a definite show stopper. > >=20 > > Am I right in inferring that the two above cases are main issues with > > snaphots at this time, or are there other known gotchas that I have to > > look out for. > About the issue b). Are you system sources before or after 2007-06-11 > 10:53:48 UTC ? Or simply show me the version of sys/ufs/ffs/ffs_snapshot.= c. >=20 > If it is less then 1.103.2.24, see developers handbook for instruction on shall be "equal to 1.103.2.24" > reporting deadlocks. >=20 --QfPW8fNxh+WKMpMU Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (FreeBSD) iD8DBQFGeV2QC3+MBN1Mb4gRAqlQAJ0ZYgIE+XLOWMzQrsfgDhphwXBQiACgjebD SV3Ga92+mDnqApRLi5vYLRw= =TnPy -----END PGP SIGNATURE----- --QfPW8fNxh+WKMpMU--