From owner-freebsd-fs@freebsd.org Wed Oct 21 01:29:00 2015 Return-Path: Delivered-To: freebsd-fs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 7FB25A195AB for ; Wed, 21 Oct 2015 01:29:00 +0000 (UTC) (envelope-from jason@broken.net) Received: from broken.net (broken.net [198.134.7.18]) by mx1.freebsd.org (Postfix) with ESMTP id 6B61A1A8 for ; Wed, 21 Oct 2015 01:29:00 +0000 (UTC) (envelope-from jason@broken.net) Received: from [192.168.253.69] (c-73-158-46-10.hsd1.ca.comcast.net [73.158.46.10]) by broken.net (Postfix) with ESMTPSA id 9C2D3D798; Tue, 20 Oct 2015 18:04:54 -0700 (PDT) Subject: Re: [zfs] RE: granularity of performance penalty from resilvering To: zfs@lists.illumos.org, Fred Liu , "zfs-discuss@list.zfsonlinux.org" , developer , freebsd-fs , zfs-discuss References: From: Jason Matthews Message-ID: <5626E4B3.2020904@broken.net> Date: Tue, 20 Oct 2015 18:04:51 -0700 User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit X-Content-Filtered-By: Mailman/MimeDel 2.1.20 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: Wed, 21 Oct 2015 01:29:00 -0000 you could look at these tunables (not the settings themselves)... these settings actually make resilvers have a higher priority. You obviously would want to go the other way. j. |* Prioritize resilvering by setting the delay to zero set zfs:zfs_resilver_delay = 0|| * Prioritize scrubs by setting the delay to zero set zfs:zfs_scrub_delay = 0 ||* resilver for five seconds per TXG set zfs:zfs_resilver_min_time_ms = 5000 | |echo zfs_resilver_delay/w0 | mdb -kw echo zfs_scrub_delay/w0 |mdb -kw echo zfs_top_maxinflight/w7f |mdb -kw echo zfs_resilver_min_time_ms/w1388 |mdb -kw | On 10/19/2015 11:49 PM, Fred Liu wrote: > > Yes, “zpool scrub –s” can stop the resilvering. > > *From:*Fred Liu > *Sent:* 星 期二, 十月20, 2015 12:15 > *To:* 'zfs-discuss@list.zfsonlinux.org'; developer; illumos-zfs; > freebsd-fs; zfs-discuss > *Subject:* granularity of performance penalty from resilvering > > Sorry if is a duplicate thread. > > The last suffering has been lasted for two weeks for we replaced a 6TB > HDD. > > There should be some IO throttle measure from ZFS software stack. At > least, we can try to stop resilvering like scrubbing > > if the realization is quiet complicated. > > Besides that, will nice zil/cache be relief? > > Thanks. > > Fred > > *illumos-zfs* | Archives > > > | Modify > > Your Subscription [Powered by Listbox] >