From owner-freebsd-fs@FreeBSD.ORG  Wed Jul  3 13:03:06 2013
Return-Path: <owner-freebsd-fs@FreeBSD.ORG>
Delivered-To: freebsd-fs@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 by hub.freebsd.org (Postfix) with ESMTP id 69AA0A1C
 for <freebsd-fs@freebsd.org>; Wed,  3 Jul 2013 13:03:06 +0000 (UTC)
 (envelope-from daniel@digsys.bg)
Received: from smtp-sofia.digsys.bg (smtp-sofia.digsys.bg [193.68.21.123])
 by mx1.freebsd.org (Postfix) with ESMTP id CB7EA1B01
 for <freebsd-fs@freebsd.org>; Wed,  3 Jul 2013 13:03:05 +0000 (UTC)
Received: from dcave.digsys.bg (dcave.digsys.bg [193.68.6.1])
 (authenticated bits=0)
 by smtp-sofia.digsys.bg (8.14.6/8.14.6) with ESMTP id r63D33lY036715
 (version=TLSv1/SSLv3 cipher=DHE-RSA-CAMELLIA256-SHA bits=256 verify=NO)
 for <freebsd-fs@freebsd.org>; Wed, 3 Jul 2013 16:03:03 +0300 (EEST)
 (envelope-from daniel@digsys.bg)
Message-ID: <51D42107.1050107@digsys.bg>
Date: Wed, 03 Jul 2013 16:03:03 +0300
From: Daniel Kalchev <daniel@digsys.bg>
User-Agent: Mozilla/5.0 (X11; FreeBSD amd64;
 rv:17.0) Gecko/20130627 Thunderbird/17.0.7
MIME-Version: 1.0
To: freebsd-fs@freebsd.org
Subject: Re: Slow resilvering with mirrored ZIL
References: <CABBFC07-68C2-4F43-9AFC-920D8C34282E@unixconn.com>
In-Reply-To: <CABBFC07-68C2-4F43-9AFC-920D8C34282E@unixconn.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
X-BeenThere: freebsd-fs@freebsd.org
X-Mailman-Version: 2.1.14
Precedence: list
List-Id: Filesystems <freebsd-fs.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-fs>,
 <mailto:freebsd-fs-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-fs>
List-Post: <mailto:freebsd-fs@freebsd.org>
List-Help: <mailto:freebsd-fs-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-fs>,
 <mailto:freebsd-fs-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 03 Jul 2013 13:03:06 -0000


On 03.07.13 15:46, Maxim Bourmistrov wrote:
> Any ideas?
> Am I completely wrong in assuming that ZIL is involved in resilvering process?

Yes. :-)

Under some conditions, such as using dedup resilver can be really slow. 
Nothing to do with ZIL though. You can safely remove ZIL while 
resilvering.. it is used only during sync writes to the pool at file 
system level.

Daniel