From owner-freebsd-fs@FreeBSD.ORG Fri May 1 22:44:21 2015 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 1C7F1CDB for ; Fri, 1 May 2015 22:44:21 +0000 (UTC) Received: from mail-pd0-x22f.google.com (mail-pd0-x22f.google.com [IPv6:2607:f8b0:400e:c02::22f]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id E06A71725 for ; Fri, 1 May 2015 22:44:20 +0000 (UTC) Received: by pdbqa5 with SMTP id qa5so104679031pdb.1 for ; Fri, 01 May 2015 15:44:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=message-id:date:from:user-agent:mime-version:to:subject:references :in-reply-to:content-type:content-transfer-encoding; bh=N9esgJjf3zHXiYbbrUQcC0SgXMT+8UCg8W9B8yjg5y8=; b=0Kj0HjuwgbK3hJg/j4OEtRXfAXCUQ97MDUlxpzRDJAoxJnjlaDIgDhuqT5zr5f7DZo xRPo1zYsGwRxZKxsQLYrcPN5iVyjW3zHY91m/Ei4HicGIrn17JbezL45Z8G3ZtLGKqpL Ly1LCaJDsHK2UqiPGd0W5EE7skcHv7144de4f3FPYDJ7yo8pavBM/64q5+eRtTOoetx8 trmy0Q9BSHx8RCtMS3MDNAmtQd8oTAqJh0AKTUaYYPr6zFxE5wlYNFLQxDTu75rQkYXZ HRq/elkymXAeYPvPS5WGEzor/BSL5nC96XJzgpoDQqFmprNv+W+71LEZvHIEJZL6ARyS ekOw== X-Received: by 10.66.249.168 with SMTP id yv8mr21914487pac.49.1430520260146; Fri, 01 May 2015 15:44:20 -0700 (PDT) Received: from [192.168.0.3] (c-50-186-4-10.hsd1.or.comcast.net. [50.186.4.10]) by mx.google.com with ESMTPSA id sm7sm5811320pac.45.2015.05.01.15.44.18 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 01 May 2015 15:44:18 -0700 (PDT) Message-ID: <554401C1.9020801@gmail.com> Date: Fri, 01 May 2015 15:44:17 -0700 From: Lacey Powers User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.6.0 MIME-Version: 1.0 To: freebsd-fs@freebsd.org Subject: Re: vfs.zfs.write_to_degraded missing in 10.1? References: In-Reply-To: Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 01 May 2015 22:44:21 -0000 Hello Gabor, It looks like this was an upstream behavior that was changed. Here's the bug from Illumos: https://www.illumos.org/issues/4976 And it was pulled in in r269010in FreeBSD https://svnweb.freebsd.org/base?view=revision&revision=269010 I'm not entirely sure about what the changes mean, but it seems like it will always try for the behavior of the vfs.zfs.write_to_degraded sysctl, except in instances where the vdev is non-redundant and top-level.It might help to ask for further clarification on an Illumos or OpenZFS mailing list, or in the IRC channels on freenode for each, #illumos or #openzfs. Hope that helps. =) Regards, Lacey On 04/29/2015 14:40, Gabor Radnai wrote: > Hi, > > I run 10.1-stable (r281854), is it possible I missed the announcement of > removing vfs.zfs.write_to_degraded sysctl variable? > > The Handbook's Advanced Topics 20.6 is mentioning this variable as "to > allow writing to degraded vdevs to prevent the amount of free space across > the vdevs from becoming unbalanced, which will reduce read and write > performance." > > How can this be achieved currently? > > Thanks. > _______________________________________________ > 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"