From owner-freebsd-fs@freebsd.org Tue Apr 26 16:34:35 2016 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 5AED4B1C1EC for ; Tue, 26 Apr 2016 16:34:35 +0000 (UTC) (envelope-from 000.fbsd@quip.cz) Received: from elsa.codelab.cz (elsa.codelab.cz [94.124.105.4]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 2062C1FC5 for ; Tue, 26 Apr 2016 16:34:34 +0000 (UTC) (envelope-from 000.fbsd@quip.cz) Received: from elsa.codelab.cz (localhost [127.0.0.1]) by elsa.codelab.cz (Postfix) with ESMTP id 098EB28423; Tue, 26 Apr 2016 18:34:33 +0200 (CEST) Received: from illbsd.quip.test (ip-86-49-16-209.net.upcbroadband.cz [86.49.16.209]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by elsa.codelab.cz (Postfix) with ESMTPSA id 0468F28431; Tue, 26 Apr 2016 18:34:32 +0200 (CEST) Message-ID: <571F9897.2070008@quip.cz> Date: Tue, 26 Apr 2016 18:34:31 +0200 From: Miroslav Lachman <000.fbsd@quip.cz> User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:35.0) Gecko/20100101 Firefox/35.0 SeaMonkey/2.32 MIME-Version: 1.0 To: DH , freebsd-fs@freebsd.org Subject: Re: How to speed up slow zpool scrub? References: <698816653.2698619.1461685653634.JavaMail.yahoo.ref@mail.yahoo.com> <698816653.2698619.1461685653634.JavaMail.yahoo@mail.yahoo.com> In-Reply-To: <698816653.2698619.1461685653634.JavaMail.yahoo@mail.yahoo.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 26 Apr 2016 16:34:35 -0000 DH wrote on 04/26/2016 17:47: >> 5GB of RAM > > That seems to be an insufficient amount of system ram when employing zfs. > > Take a look at this: > > http://doc.freenas.org/9.3/freenas_intro.html#ram I know 5GB is not much these days but is memory used for scrubbing a lot? Because I am satisfied with working performance. The only concern is slow scrubbing and I am not sure that more memory helps in this case. Miroslav Lachman