From owner-freebsd-fs@FreeBSD.ORG Wed Jul 3 13:36:27 2013 Return-Path: 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 DDD07429 for ; Wed, 3 Jul 2013 13:36:27 +0000 (UTC) (envelope-from mxb@alumni.chalmers.se) Received: from mail-la0-f42.google.com (mail-la0-f42.google.com [209.85.215.42]) by mx1.freebsd.org (Postfix) with ESMTP id 63E641CDA for ; Wed, 3 Jul 2013 13:36:26 +0000 (UTC) Received: by mail-la0-f42.google.com with SMTP id eb20so142233lab.15 for ; Wed, 03 Jul 2013 06:36:20 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=content-type:mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to:x-mailer :x-gm-message-state; bh=n7Ilz8wd5SDFuNOLZkNjL6YSm2H4mmLFi79WSqkOBGo=; b=duE41FUVVVOF1zAn9rZiv5gE7l6u0PzwEe3J/va/xxGlc36Gse+P0BPFfm6EAot9Td HOrC+kjSxaLzahWjxnAaC4jx6XB8CqKmPuDqc0txfwJwvtweF0b1vJPX5oex5yuhm3r7 v6qUV2fmbxYUPeepMjb3AlV9KGbKkLv+vERRz4UbhIPfXO/9pfJpM0Q5PG5WcIzRFeZn SFtBHUYn4lXhDF/Il4SfHZfGcczDJPcqXsWxwM1BeYRgQrFwKYv4Hz0kPxxTOY7Q0RqF j+2ZcbLHL641P0kLOvbuRb9uPJZ/d8MMukD+kVsfzVSD+Trk9scpIFkzH+O6/GVOL0R9 JN8w== X-Received: by 10.112.168.132 with SMTP id zw4mr1271492lbb.79.1372858579988; Wed, 03 Jul 2013 06:36:19 -0700 (PDT) Received: from grey.home.unixconn.com (h-74-23.a183.priv.bahnhof.se. [46.59.74.23]) by mx.google.com with ESMTPSA id m1sm10885043lag.3.2013.07.03.06.36.18 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Wed, 03 Jul 2013 06:36:19 -0700 (PDT) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 6.5 \(1508\)) Subject: Re: Slow resilvering with mirrored ZIL From: mxb In-Reply-To: <51D42107.1050107@digsys.bg> Date: Wed, 3 Jul 2013 15:36:17 +0200 Content-Transfer-Encoding: quoted-printable Message-Id: <2EF46A8C-6908-4160-BF99-EC610B3EA771@alumni.chalmers.se> References: <51D42107.1050107@digsys.bg> To: Daniel Kalchev X-Mailer: Apple Mail (2.1508) X-Gm-Message-State: ALoCoQm+OORnKeyGYVI3uVBzvuSvDFCqSqnM/dGl0GIBnEgnF7wQabX0d2wJHVCufKUkRHeiQUFR Cc: freebsd-fs@freebsd.org 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: Wed, 03 Jul 2013 13:36:27 -0000 Well, then my question persists - why I get so significant drop of speed = while resilvering second drive. The only changes to the system are: 1. Second partition for ZIL to create a mirror 2. New disks are 7200rpm. old ones are 5400rpm. On 3 jul 2013, at 15:03, Daniel Kalchev wrote: >=20 > On 03.07.13 15:46, Maxim Bourmistrov wrote: >> Any ideas? >> Am I completely wrong in assuming that ZIL is involved in resilvering = process? >=20 > Yes. :-) >=20 > 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. >=20 > Daniel > _______________________________________________ > freebsd-fs@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-fs > To unsubscribe, send any mail to "freebsd-fs-unsubscribe@freebsd.org"