From owner-freebsd-stable@FreeBSD.ORG Thu Apr 28 17:04:12 2011 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 9EA91106564A for ; Thu, 28 Apr 2011 17:04:12 +0000 (UTC) (envelope-from mwaltz@PACIFIC.EDU) Received: from mx30.pacific.edu (mx30.pacific.edu [138.9.110.74]) by mx1.freebsd.org (Postfix) with ESMTP id 7B90D8FC0A for ; Thu, 28 Apr 2011 17:04:12 +0000 (UTC) Received: from mx30.pacific.edu (localhost [127.0.0.1]) by localhost (Postfix) with SMTP id 0EADC2C5D8D; Thu, 28 Apr 2011 09:46:32 -0700 (PDT) Received: from EXCASHUB2.stk.pacific.edu (excashub2.stk.pacific.edu [10.9.4.122]) by mx30.pacific.edu (Postfix) with ESMTP id 74EEC2C5D7B; Thu, 28 Apr 2011 09:46:31 -0700 (PDT) Received: from EXMB2.STK.PACIFIC.EDU ([10.9.4.102]) by excashub2.stk.pacific.edu ([10.9.4.122]) with mapi id 14.01.0289.001; Thu, 28 Apr 2011 09:46:30 -0700 From: Malcolm Waltz To: Daniel O'Connor Thread-Topic: ZFS vs OSX Time Machine Thread-Index: AQHMBa0X6h4oagP/h0u8OmOQbCHfSJRz8aKA Date: Thu, 28 Apr 2011 16:46:30 +0000 Message-ID: References: <537A8F4F-A302-40F9-92DF-403388D99B4B@gsoft.com.au> In-Reply-To: <537A8F4F-A302-40F9-92DF-403388D99B4B@gsoft.com.au> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.9.104.200] Content-Type: text/plain; charset="us-ascii" Content-ID: Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-PMX-Version: 5.6.0.2009776, Antispam-Engine: 2.7.2.376379, Antispam-Data: 2011.4.28.162420 X-PerlMx-Spam: Gauge=XIII, Probability=13%, Report=' URI_HOSTNAME_CONTAINS_EQUALS 1, BLOGSPOT_URI 0.05, KNOWN_FREEWEB_URI 0.05, SUPERLONG_LINE 0.05, BODYTEXTP_SIZE_3000_LESS 0, BODY_SIZE_2000_2999 0, BODY_SIZE_5000_LESS 0, BODY_SIZE_7000_LESS 0, ECARD_KNOWN_DOMAINS 0, FROM_EDU_TLD 0, WEBMAIL_SOURCE 0, WEBMAIL_XOIP 0, WEBMAIL_X_IP_HDR 0, __BOUNCE_CHALLENGE_SUBJ 0, __BOUNCE_NDR_SUBJ_EXEMPT 0, __CANPHARM_UNSUB_LINK 0, __CP_MEDIA_BODY 0, __CP_URI_IN_BODY 0, __CT 0, __CTE 0, __CT_TEXT_PLAIN 0, __HAS_MSGID 0, __HAS_XOIP 0, __INT_PROD_COMP 0, __KNOWN_FREEWEB_URI1 0, __MIME_TEXT_ONLY 0, __MIME_VERSION 0, __MSGID_APPLEMAIL 0, __PHISH_SPEAR_STRUCTURE_1 0, __SANE_MSGID 0, __TO_MALFORMED_2 0, __URI_NS ' Cc: freebsd-stable List Subject: Re: ZFS vs OSX Time Machine X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 28 Apr 2011 17:04:12 -0000 I doubt the issues you are encountering have much to do with ZFS. It sounds like you are using TimeMachine over NFS. Obviously, Apple does n= ot support that configuration: http://www.google.com/search?q=3Dtime+machine+nfs+site:apple.com In my opinion, TimeMachine should only be used with block storage. If you = use any kind of file-sharing protocol (AFP, SMB/CIFS or NFS), TimeMachine i= s implemented using a sparse disk image broken into hundreds or thousands o= f separate files. This is a hack at best. Time machine works very well with locally attached storage, but if you need= to use network storage, you might want to try iSCSI: http://thegreyblog.blogspot.com/2010/02/using-zfs-with-apple-time-machine.h= tml http://people.freebsd.org/~rse/iscsi/iscsi.txt On Apr 28, 2011, at 7:03 AM, Daniel O'Connor wrote: > Does anyone else use ZFS to store TM backups? >=20 > I find that whenever my laptop (over wifi!) starts a TM the ZFS machine i= t's backing up to grinds to a halt.. Other systems streaming stuff over NFS= from it also tend to stall.. >=20 > I presume that TM is doing something which causes ZFS some issues but I'm= not sure how to find out what the real problem is let alone how to fix it.= . >=20 > I am running FreeBSD midget.dons.net.au 8.2-PRERELEASE FreeBSD 8.2-PREREL= EASE #8 r217094M: Sat Jan 8 11:15:07 CST 2011 darius@midget.dons.net.a= u:/usr/obj/usr/src/sys/MIDGET amd64 >=20 > It is a 5 disk RAIDZ1 with 1.29Tb free using WD10EADS drives. >=20 > I don't see any SMART errors or ZFS warnings. >=20 > I have the following ZFS related tunables >=20 > vfs.zfs.arc_max=3D"3072M" > vfs.zfs.prefetch_disable=3D"1"=20 > vfs.zfs.txg.timeout=3D5 > vfs.zfs.cache_flush_disable=3D1 >=20 > Any help appreciated, thanks :) >=20 > -- > Daniel O'Connor software and network engineer > for Genesis Software - http://www.gsoft.com.au > "The nice thing about standards is that there > are so many of them to choose from." > -- Andrew Tanenbaum > GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C >=20 >=20 >=20 >=20 >=20 >=20 > _______________________________________________ > 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"