From owner-freebsd-fs@FreeBSD.ORG Mon Jul 8 20:06:33 2013 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) by hub.freebsd.org (Postfix) with ESMTP id 7D086FF0 for ; Mon, 8 Jul 2013 20:06:33 +0000 (UTC) (envelope-from berend@pobox.com) Received: from smtp.pobox.com (b-pb-sasl-quonix.pobox.com [208.72.237.35]) by mx1.freebsd.org (Postfix) with ESMTP id 44AB016FC for ; Mon, 8 Jul 2013 20:06:32 +0000 (UTC) Received: from smtp.pobox.com (unknown [127.0.0.1]) by b-sasl-quonix.pobox.com (Postfix) with ESMTP id 3834E2FFB3; Mon, 8 Jul 2013 20:06:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=pobox.com; h=date :message-id:from:to:cc:subject:in-reply-to:references :mime-version:content-type:content-transfer-encoding; s=sasl; bh=pC03HdW5XSxRW3TjPPhnOWTymdk=; b=sUiETYgGroc+jOX9+8Ehn8pJVtOT 7YNgCOhGuiOC5Y/omOrhJlberSpbJQafDOYovZEZg0qlZJtdkSNwn9tC8XkB9hGq 0FuC3AMclos/bWV1DvXF6J8vlzNXX7q3htqT0iINabg8zJnitCDsLMmISz0wOJdg VMJMEENR4vzsADM= DomainKey-Signature: a=rsa-sha1; c=nofws; d=pobox.com; h=date:message-id :from:to:cc:subject:in-reply-to:references:mime-version :content-type:content-transfer-encoding; q=dns; s=sasl; b=d6I++Z o2LYvyP+fT2tgz8GFeSCfCNN1QHCQvUnhsd4C82LeTQRu30Y/TO+JB36PJGXyoKX 36aaIbcAi7Gf8KGddX795TdZEdj71XqlQHXUa+p2Q8JeuOGFez23M1Wu4oYOOOe2 EEFxwqpYlt/UCxRmUKr9gZJdSbbTwq+7CSHhY= Received: from b-pb-sasl-quonix.pobox.com (unknown [127.0.0.1]) by b-sasl-quonix.pobox.com (Postfix) with ESMTP id 2BB492FFB2; Mon, 8 Jul 2013 20:06:29 +0000 (UTC) Received: from bmach.nederware.nl (unknown [27.252.169.66]) by b-sasl-quonix.pobox.com (Postfix) with ESMTPA id 0F9FA2FFA6; Mon, 8 Jul 2013 20:06:28 +0000 (UTC) Received: from quadrio.nederware.nl (quadrio.nederware.nl [192.168.33.13]) by bmach.nederware.nl (Postfix) with ESMTP id E32F45C55; Tue, 9 Jul 2013 08:06:20 +1200 (NZST) Received: from quadrio.nederware.nl (quadrio.nederware.nl [127.0.0.1]) by quadrio.nederware.nl (Postfix) with ESMTP id 38A7A49FB97A; Tue, 9 Jul 2013 08:06:25 +1200 (NZST) Date: Tue, 09 Jul 2013 08:06:25 +1200 Message-ID: <877gh024vy.wl%berend@pobox.com> From: Berend de Boer To: Markus Gebert Subject: Re: EBS snapshot backups from a FreeBSD zfs file system: zpool freeze? In-Reply-To: <41CC5720-B1EA-4841-8BA5-893F4A628EAD@hostpoint.ch> References: <87li5o5tz2.wl%berend@pobox.com> <87ehbg5raq.wl%berend@pobox.com> <20130703055047.GA54853@icarus.home.lan> <6488DECC-2455-4E92-B432-C39490D18484@dragondata.com> <14A2336A-969C-4A13-9EFA-C0C42A12039F@hostpoint.ch> <87zjty11gn.wl%berend@pobox.com> <41CC5720-B1EA-4841-8BA5-893F4A628EAD@hostpoint.ch> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL/10.8 EasyPG/1.0.0 Emacs/24.3 (i686-pc-linux-gnu) MULE/6.0 (HANACHIRUSATO) Organization: Xplain Technology Ltd MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: multipart/signed; boundary="pgp-sign-Multipart_Tue_Jul__9_08:06:24_2013-1"; micalg=pgp-sha256; protocol="application/pgp-signature" Content-Transfer-Encoding: 7bit X-Pobox-Relay-ID: DFC09486-E809-11E2-827F-E84251E3A03C-48001098!b-pb-sasl-quonix.pobox.com Cc: freebsd-fs X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 08 Jul 2013 20:06:33 -0000 --pgp-sign-Multipart_Tue_Jul__9_08:06:24_2013-1 Content-Type: text/plain; charset=US-ASCII >>>>> "Markus" == Markus Gebert writes: Markus> By 'mount' do you mean the import of the pool? Did you use Markus> -F on import? In any case, this sounds too long. Was the Markus> system doing IO? Yep, did -F as well, I believe I have seen the most disastrous imports in that case, i.e. empty disks. And it did continuous I/O, as best as I could determine at max disk performance. >> Another interesting thing I've seen was a completely empty >> drive after mount! Markus> That's a bit unspecific. What's empty? Disk full of zeros? Markus> Partition full of zeros? Pool without file system on it? Markus> Pool with empty filesystems? With empty file systems. Markus> What you really need in that case is the ability to Markus> snapshot all EBS disks as group. Which Linux offers. Markus> Anyway, with the tools at hand (no IO "freeze" like Linux, Markus> no EBS snapshots for groups of disks), I don't think you Markus> can acomplish what you originally intended. Indeed. I think my best strategy is doing frequent ZFS snapshots to a stand-by server, and take the backups from there. -- All the best, Berend de Boer ------------------------------------------------------ Awesome Drupal hosting: https://www.xplainhosting.com/ --pgp-sign-Multipart_Tue_Jul__9_08:06:24_2013-1 Content-Type: application/pgp-signature Content-Transfer-Encoding: 7bit Content-Description: OpenPGP Digital Signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.17 (GNU/Linux) iQIcBAABCAAGBQJR2xvAAAoJEKOfeD48G3g5Hg4P/2uEveGay27gtcSb5KEKg62q xy3aW6Hm5GH40WbXYxdRAGMcwQwnVwzYPTefE05KTd+KYl6fXHPA2prVLmOm2PVJ u82ff/E3SjEUq6eAqIl8pngztXfoTcoSosATV4bIk01a4zuSGf+KndMWSqt8LhuQ Rixpz/nakYEa7T1zcIYkNiH5BSoqSKdFuWqOhTCUeDC61tN1sno+uzhBi3+X0gFv uUdcrl5Aic3hfVmLzSL4jHznMuS9xEDgsossEmTNfKK6tgw+F0QVZK+5o4hMY3z6 1vMyAN1K5GuDxFyGusqsjf+B2rcFZYN68rRx+VjviV9yqTtKS6QO7P/HroWaRNtL bP7xacwWw3MCcwhbO9K6csVJSXSty5aHB+tbKBTtRo+0oNppZrItbOWfWZzZbpfa TiCDjMFXmkRrsw1k5cQlN5YHuovGnmc4RaS3owyi1nQKQLIt/1vGC7LsRI2ykIjs jNwbbKI09cWDsBtNjwu1aGxR4lpd7FUE2TOlMQ2+pp0HIL2JWD4L6EdZlD+uXFLd 1TnwLE4HPq8bLLJ8T22E85DQSp29Wygc/wFwEiLudGIXc9FF4LeSGZdlC8TE5B/3 hXDGfA7yB9DHEe0mVi1QF88iDIL7NWAR0pcme/jJd+Wj3lT+sWAAkug+fiCbzevK nEfproH4w+KiCGGs2Dp1 =tF0Q -----END PGP SIGNATURE----- --pgp-sign-Multipart_Tue_Jul__9_08:06:24_2013-1--