From owner-freebsd-fs@freebsd.org Fri Nov 27 16:22:01 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 3FF90A3A0F3 for ; Fri, 27 Nov 2015 16:22:01 +0000 (UTC) (envelope-from jg@internetx.com) Received: from mx1.internetx.com (mx1.internetx.com [62.116.129.39]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 01C4111F4 for ; Fri, 27 Nov 2015 16:22:00 +0000 (UTC) (envelope-from jg@internetx.com) Received: from localhost (localhost [127.0.0.1]) by mx1.internetx.com (Postfix) with ESMTP id 93BC51472002; Fri, 27 Nov 2015 17:21:58 +0100 (CET) X-Virus-Scanned: InterNetX GmbH amavisd-new at ix-mailer.internetx.de Received: from mx1.internetx.com ([62.116.129.39]) by localhost (ix-mailer.internetx.de [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id A0f2w7RKW1Rs; Fri, 27 Nov 2015 17:21:56 +0100 (CET) Received: from [192.168.100.26] (pizza.internetx.de [62.116.129.3]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) by mx1.internetx.com (Postfix) with ESMTPSA id B2B651472004; Fri, 27 Nov 2015 17:21:56 +0100 (CET) Reply-To: jg@internetx.com Subject: Re: High fragmentation on zpool log References: <565875A7.6060004@free.de> <56587B83.9020506@internetx.com> <5658824D.6070800@free.de> To: Kai Gallasch , freebsd-fs@freebsd.org From: InterNetX - Juergen Gotteswinter Message-ID: <56588326.8050800@internetx.com> Date: Fri, 27 Nov 2015 17:21:58 +0100 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 MIME-Version: 1.0 In-Reply-To: <5658824D.6070800@free.de> Content-Type: text/plain; charset=utf-8 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, 27 Nov 2015 16:22:01 -0000 Am 27.11.2015 um 17:18 schrieb Kai Gallasch: > On 27.11.2015 16:49 InterNetX - Juergen Gotteswinter wrote: >> Your SSDS are not really attached as Zil ? > > Sorry. Due to copying&pasting a condensed version of zpool list -v, I > forgot to paste a line.. so this is the corrected version: > > Sorry, > Kai. > :) i think this is caused by the size of your Zil, dunno if its really something to care about ( i whould not worry about). More problematic (regarding SSD Lifetime) is the dual use of SSD for ZIL / L2. Your Flash Drives get hammered with writes from 2 Sides. Write Caching, and L2 Feed ing. > > (zpool list -v output, ommited columns: EXPANDSZ.,DEDUP, > HEALTH, ALTROOT) > > NAME SIZE ALLOC FREE FRAG CAP > rpool 7.25T 440G 6.82T 4% 5% > mirror 1.81T 110G 1.71T 4% 5% > gpt/rpool-WMC160D0SVZE - - - - - > gpt/rpool-WMC160D8MJPD - - - - - > mirror 1.81T 110G 1.70T 4% 5% > gpt/rpool-WMC160D9DLL2 - - - - - > gpt/rpool-WMC160D23CWA - - - - - > mirror 1.81T 110G 1.71T 4% 5% > gpt/rpool-WMC160D94930 - - - - - > gpt/rpool-WMC160D9V5LW - - - - - > mirror 1.81T 110G 1.71T 4% 5% > gpt/rpool-WMC160D9ZV0S - - - - - > gpt/rpool-WMC160D5HFT6 - - - - - > logs > mirror 7.94G 43.2M 7.90G 85% 0% > gpt/log-BTTV523401U4100FGN - - - - - > gpt/log-BTTV5234003K100FGN - - - - - > cache - - - - - > gpt/cache-BTTV5234003K100FGN 85.2G 142G 16.0E 0% 166% > gpt/cache-BTTV523401U4100FGN 85.2G 172G 16.0E 0% 202% > > > > >