From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from firstgate.proxmox.com (firstgate.proxmox.com [212.224.123.68]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by lists.proxmox.com (Postfix) with ESMTPS id 9EFF069470 for ; Mon, 26 Jul 2021 11:37:54 +0200 (CEST) Received: from firstgate.proxmox.com (localhost [127.0.0.1]) by firstgate.proxmox.com (Proxmox) with ESMTP id 94EB8AF3F for ; Mon, 26 Jul 2021 11:37:54 +0200 (CEST) Received: from smtp1.ngi.it (smtp1.ngi.it [88.149.128.112]) by firstgate.proxmox.com (Proxmox) with ESMTP id C1F85AF34 for ; Mon, 26 Jul 2021 11:37:53 +0200 (CEST) Received: from tank.sv.lnf.it (88-147-114-200.static.eolo.it [88.147.114.200]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp1.ngi.it (Postfix) with ESMTPS id 72A7B612CA for ; Mon, 26 Jul 2021 11:37:47 +0200 (CEST) Authentication-Results: smtp1.ngi.it; dkim=pass (1024-bit key; unprotected) header.d=sv.lnf.it header.i=@sv.lnf.it header.b="hbqLtCt6"; dkim-atps=neutral DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sv.lnf.it; s=2017; h=Content-Transfer-Encoding:Content-Type:MIME-Version:Message-ID: Subject:To:From:Date:Sender:Reply-To:Cc:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: In-Reply-To:References:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=cUE453QAP3++FP/02fJcoF1hVLiYVp4/dKFmc+2rsYM=; b=hbqLtCt6d73IlBqIWwBeXTClQ7 JVUuSCaxR7xgzLkw/ZE4bixV9t2AxwxX4je6umt0ljyJZ+bDIgAl2AX9Lh7hFXN60oJsqUYajMpkh 4WMf2Na41EfJ4HDy3NfauoAx7KiIUoUdj5YYfTql9svWC6P/vaHTq7NStJ0SS1Ttzxi4=; Received: from [10.5.1.3] (helo=vdmsv1.ad.fvg.lnf.it) by tank.sv.lnf.it with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1m7x3S-000B3P-Nh for pve-user@lists.proxmox.com; Mon, 26 Jul 2021 11:37:46 +0200 Received: from [10.5.1.44] (helo=hermione.sv.lnf.it) by vdmsv1.ad.fvg.lnf.it with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1m7x3S-0002Sq-7w for pve-user@lists.proxmox.com; Mon, 26 Jul 2021 11:37:46 +0200 Received: by hermione.sv.lnf.it (Postfix, from userid 1000) id 1A43EA00080; Mon, 26 Jul 2021 11:37:46 +0200 (CEST) Date: Mon, 26 Jul 2021 11:37:46 +0200 From: Marco Gaiarin To: pve-user@lists.proxmox.com Message-ID: <20210726093746.GB3289@sv.lnf.it> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit 'Organization: Associazione La Nostra Famiglia - Polo FVG' 'From: Marco Gaiarin ' X-SPAM-LEVEL: Spam detection results: 0 AWL 0.233 Adjusted score from AWL reputation of From: address BAYES_00 -1.9 Bayes spam probability is 0 to 1% DKIM_SIGNED 0.1 Message has a DKIM or DK signature, not necessarily valid DKIM_VALID -0.1 Message has at least one valid DKIM or DK signature DKIM_VALID_AU -0.1 Message has a valid DKIM or DK signature from author's domain JMQ_SPF_NEUTRAL 0.5 SPF set to ?all RCVD_IN_DNSWL_NONE -0.0001 Sender listed at https://www.dnswl.org/, no trust SPF_HELO_PASS -0.001 SPF: HELO matches SPF record SPF_NEUTRAL 0.779 SPF: sender does not match SPF record (neutral) Subject: [PVE-User] ZFS configurations, performance and optimization... X-BeenThere: pve-user@lists.proxmox.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: Proxmox VE user list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 26 Jul 2021 09:37:54 -0000 Consider two rather equal servers, both with equal disks (2TB rotational drives); one server have a ZFS mirror (two disk), the other have a ZFS RAIDZ1, with 3 disks. Both server are unload, we are moving data in, via single Gigabit connection. Moving data into the ZFS mirror lead to a impressive 120 Mbyte/s writing speed, with little or no iodelay (1-2 %). Moving data into ZRAID1 lead to an 60-70 Mbyte/s writing speed, no more, and a decent iodelay on the system (8-10 %). Both seems to me configured equally (eg, for example, no compression). I've read: https://pve.proxmox.com/wiki/ZFS_on_Linux#sysadmin_zfs_raid_considerations but really i'm got a bit lost... there's somewhere a more clear explanation of the 'effect', and i hope some parameters to tackle with? Thanks. PS: it is not a problem 'per se', the RAIDZ1 pool could be 'slow', but i've the doubt to have done somthing wrong... -- dott. Marco Gaiarin GNUPG Key ID: 240A3D66 Associazione ``La Nostra Famiglia'' http://www.lanostrafamiglia.it/ Polo FVG - Via della Bontà, 7 - 33078 - San Vito al Tagliamento (PN) marco.gaiarin(at)lanostrafamiglia.it t +39-0434-842711 f +39-0434-842797 Dona il 5 PER MILLE a LA NOSTRA FAMIGLIA! http://www.lanostrafamiglia.it/index.php/it/sostienici/5x1000 (cf 00307430132, categoria ONLUS oppure RICERCA SANITARIA)