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) server-digest SHA256) (No client certificate requested) by lists.proxmox.com (Postfix) with ESMTPS id 92B956C62D for ; Mon, 29 Mar 2021 16:26:51 +0200 (CEST) Received: from firstgate.proxmox.com (localhost [127.0.0.1]) by firstgate.proxmox.com (Proxmox) with ESMTP id 81D0316851 for ; Mon, 29 Mar 2021 16:26:51 +0200 (CEST) Received: from mail.ud08.udmedia.de (ud08.udmedia.de [194.117.254.48]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by firstgate.proxmox.com (Proxmox) with ESMTPS id C968516849 for ; Mon, 29 Mar 2021 16:26:50 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=simple; d=aeppelbroe.de; h=from :in-reply-to:references:list-id:to:subject:message-id:date :content-type:mime-version; s=k1; bh=PVTXzx3dF/ALtVbCunPAliRqNyk V8ETgbJjzFPlIMlU=; b=NVvT1hSUdbau5u1eKUfYCB+3ZlX9/hkH9My1eJS+4pt kAWJdMoe6pk4Ju0oWTe/Xa1ZPKv+HV9apPW2m7Svu+2W+l31YLqCrgJ+h+O06fF2 o3eO1Fmx1t9KeNQr/+TpLe0/bHWlyv0XX7OF1j+7wFc9BDI50Z0jqF33biEtEyGE = Received: (qmail 1526103 invoked from network); 29 Mar 2021 16:26:50 +0200 Received: by mail.ud08.udmedia.de with ESMTPSA (TLS_AES_256_GCM_SHA384 encrypted, authenticated); 29 Mar 2021 16:26:50 +0200 X-UD-Smtp-Session: ud08?166p2@UdkirK2+g51f3hT8 Received: from localhost (localhost [127.0.0.1]) by baikonur.fritz.box (Postfix) with ESMTP id 14FC0D27604 for ; Mon, 29 Mar 2021 16:26:50 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at baikonur.orbit.local Received: from baikonur.fritz.box ([127.0.0.1]) by localhost (baikonur.fritz.box [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id WqxMvHkO1_SM for ; Mon, 29 Mar 2021 16:26:49 +0200 (CEST) Received: from baikonur (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by baikonur.fritz.box (Postfix) with ESMTPS id C228DD27603 for ; Mon, 29 Mar 2021 16:26:49 +0200 (CEST) User-Agent: EGroupware API 17.1.007 From: Gregor Burck X-Priority: 3 X-Mailer: EGroupware-Mail In-Reply-To: <20210329152820.EGroupware._t1Sneg3e4BsuWUv_4EVNL7@heim.aeppelbroe.de> References: <20210329152820.EGroupware._t1Sneg3e4BsuWUv_4EVNL7@heim.aeppelbroe.de> To: Proxmox VE user list Message-ID: <20210329162649.EGroupware.4CrZ3F-LN8ASNYil4-Oqk6z@heim.aeppelbroe.de> Date: Mon, 29 Mar 2021 16:26:49 +0200 Content-Type: text/plain; charset=utf-8; format=flowed; DelSp=Yes MIME-Version: 1.0 X-SPAM-LEVEL: Spam detection results: 2 AWL -0.891 Adjusted score from AWL reputation of From: address DKIM_INVALID 0.1 DKIM or DK signature exists, but is not valid DKIM_SIGNED 0.1 Message has a DKIM or DK signature, not necessarily valid FORGED_SPF_HELO 2.999 - KAM_DMARC_STATUS 0.01 Test Rule for DKIM or SPF Failure with Strict Alignment 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_NONE 0.001 SPF: sender does not publish an SPF Record Subject: Re: [PVE-User] ZFZ questions - performance and caching 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, 29 Mar 2021 14:26:51 -0000 Hi, here: https://pbs.proxmox.com/docs/sysadmin.html#zfs-administration I read something about the log device: The maximum size of a log device should be about half the size of physical memory, so this is usually quite small. The rest of the SSD can be used as cache. So the main question is, how many RAM I should plan,... When I should plan 5GB RAM (without desuplication) for every TB HDD I think I need : minimum: 4 (hdds) x 6 (TB) x 5 (RAM) x 2 (PBS and PVE) = 120GB RAM maximum: 6 (hdds) x 8 (TB) x 5 (RAM) x 2 (PBS and PVE) = 240GB RAM only for the System without RAM for the VMs? That's quite a lot,.... Maybee it is better to forget ZFS and use a hardware raid controler? The planed controler is an HP P840, wich could RAID or HBA. Bye Gregor