From owner-freebsd-questions@FreeBSD.ORG Mon Jun 15 11:37:46 2015 Return-Path: Delivered-To: freebsd-questions@hub.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 863618FC for ; Mon, 15 Jun 2015 11:37:46 +0000 (UTC) (envelope-from kraduk@gmail.com) Received: from mail-wi0-x22d.google.com (mail-wi0-x22d.google.com [IPv6:2a00:1450:400c:c05::22d]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 2565F374 for ; Mon, 15 Jun 2015 11:37:46 +0000 (UTC) (envelope-from kraduk@gmail.com) Received: by wigg3 with SMTP id g3so74359324wig.1 for ; Mon, 15 Jun 2015 04:37:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=2Wj7sHalavCKPU1c+WBAWXYF398rnOAEUk3DcF/emxA=; b=FMF/ORKX3p6rnbJ10sy6M+mo17M7zQd7KGxaAXQSbGBMmZ1hCvG5ZFdUweLzohFBuj 76udZXHghRLI1CawGHW/tVRGR+mcm+Idkik6jhZOnTSA9wss4t6unEMXf+ZjNmIgvjGt fu13cakdLz1EbepT/xZ6B0G9HoakA7eIRfRxj7g3INF50V5m63SfVLhD23ok7pcylHOZ OY/eaeNid1mx4O1UrrQo0ixixXz1fhp5CKtE/8E1iwkrDEgELCoduqdyhvxVQLTt99CG bHI9cQwDpaiLhrqeEsYHVwkBtQF6IKXL9G356TBTynKQ7uQMmoJX5O9USY4PVD8FRo4L 6PKA== MIME-Version: 1.0 X-Received: by 10.194.62.132 with SMTP id y4mr51340820wjr.91.1434368264480; Mon, 15 Jun 2015 04:37:44 -0700 (PDT) Received: by 10.28.210.149 with HTTP; Mon, 15 Jun 2015 04:37:44 -0700 (PDT) In-Reply-To: <378461483.10441535.1434361136704.JavaMail.zimbra@logitravel.com> References: <9C96EB4B-A230-4A26-BDC3-067367A61E34@shire.net> <378461483.10441535.1434361136704.JavaMail.zimbra@logitravel.com> Date: Mon, 15 Jun 2015 12:37:44 +0100 Message-ID: Subject: Re: ZFS in a VM? From: krad To: Raimund Sacherer Cc: "Chad Leigh Shire.Net LLC" , FreeBSD Questions Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.20 X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 15 Jun 2015 11:37:46 -0000 >From what i have read, and seen in the wild there is not many times you do need to tune zfs, and when you do the main one is limiting arc size, as its better to say let the DB do the caching internally rather than having the fs layer guess what to cache. In fact start tweaking bits here and there without good understanding of the internals is more likely to lead to an unstable solution. I am talking about sysctl values obviously not dataset tunables On 15 June 2015 at 10:38, Raimund Sacherer wrote: > > > I do. I do it not so much for any performance benefits, if any, ZFS > offers, > > but more for data integrity. You need to tune it since the VM based dis= ks > > are not the same as physical disks. I run into performance issues when > the > > =E2=80=9Cdisk=E2=80=9D gets to a certain usage level (in terms of used = capacity). > > Hi, > > would you mind sharing what you tune because I am in the process of using > more and more FreeBSD in our company and we have a couple of VMWare > virtualizations. > > I would love to use ZFS with beadm to be able to make working snapshots > before modifying the system and use snapshots in general. > > It would be great to be able to learn from someone who really use it and > has experience > > Thanks > Best > Ray > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to " > freebsd-questions-unsubscribe@freebsd.org"