From owner-freebsd-hackers@freebsd.org Wed Dec 23 11:41:14 2015 Return-Path: Delivered-To: freebsd-hackers@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 DD74AA4F41E for ; Wed, 23 Dec 2015 11:41:14 +0000 (UTC) (envelope-from stephen.hocking@gmail.com) Received: from mailman.ysv.freebsd.org (mailman.ysv.freebsd.org [IPv6:2001:1900:2254:206a::50:5]) by mx1.freebsd.org (Postfix) with ESMTP id C467E106D for ; Wed, 23 Dec 2015 11:41:14 +0000 (UTC) (envelope-from stephen.hocking@gmail.com) Received: by mailman.ysv.freebsd.org (Postfix) id C3B4BA4F41D; Wed, 23 Dec 2015 11:41:14 +0000 (UTC) Delivered-To: hackers@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 C33FAA4F41B for ; Wed, 23 Dec 2015 11:41:14 +0000 (UTC) (envelope-from stephen.hocking@gmail.com) Received: from mail-qg0-x22f.google.com (mail-qg0-x22f.google.com [IPv6:2607:f8b0:400d:c04::22f]) (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 85A6D106C for ; Wed, 23 Dec 2015 11:41:14 +0000 (UTC) (envelope-from stephen.hocking@gmail.com) Received: by mail-qg0-x22f.google.com with SMTP id o11so74703814qge.2 for ; Wed, 23 Dec 2015 03:41:14 -0800 (PST) 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=Cw8pe5BGITRcY+3tVgqtA6bwBFGowfquXpLQvZAVW+Q=; b=FK8ybgFiPZRlWzOzAMdPxf7SPNrE5tVil98k5Lmyh38V14ZTP3WYyWOeP89W8gk11e 6njOjCOGqm6SXNb8ApjTJpNBlk6qtnRZIz7yt/9QiD+/p/ZMid9sLPNtJKdwWDrnBo55 1pqHlkGpbLVLYvdk6UyoKQuJ6nBMA+xMl9EO3EGoXP+Nslt0/aM4O7Ur2rnLJLc+iqam l2k+AdQxt1iKM8WUIb8/xyY2m6SmkkBYxua0yeXL52Kwz8eratxHKArc/4TWHidY9o9s FhSmSrs68qJXhSkQywEyK4dfQZAgMOc1BD0+AEWjtNCD8AtunBUZiNLQmlfYZGXJ5940 Gpew== MIME-Version: 1.0 X-Received: by 10.140.220.136 with SMTP id q130mr41766546qhb.24.1450870873144; Wed, 23 Dec 2015 03:41:13 -0800 (PST) Received: by 10.140.35.177 with HTTP; Wed, 23 Dec 2015 03:41:13 -0800 (PST) In-Reply-To: <20151223113216.GA4535@zxy.spb.ru> References: <20151223113216.GA4535@zxy.spb.ru> Date: Wed, 23 Dec 2015 22:41:13 +1100 Message-ID: Subject: Re: The minimum amount of memory needed to use ZFS. From: Stephen Hocking To: Slawa Olhovchenkov Cc: hackers@freebsd.org Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.20 X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 23 Dec 2015 11:41:15 -0000 In my case, I want to use ZFS. I'm currently running FreeBSD on a number of systems, ranging from 16G (box with multiple ZFS pools and filesystems) to 256M (Early RPI), so I know it runs OK in relatively small amounts of memory (aeons ago I was running it one a box with 8MB). I was curious to know what people think it needs to run ZFS without problems. On Wed, Dec 23, 2015 at 10:32 PM, Slawa Olhovchenkov wrote: > On Wed, Dec 23, 2015 at 09:43:37PM +1100, Stephen Hocking wrote: > > > Hi all, > > > > Inspired by this article: > > > http://arstechnica.com/information-technology/2015/12/rsync-net-zfs-replication-to-the-cloud-is-finally-here-and-its-fast/ > > > > I am wondering about changing my offsite back strategy, which currently > is > > made up of a Raspberry Pi with an external 3TB drive sitting at my > > brother's house, with periodic manual rsyncs. I'd like to change that to > > doing zfs replications. > > > > I want to use some of my ARM based hardware as the target for the ZFS > > replication, owing to its low power usage. I have a few Cubiboxes > floating > > around with around 2G of RAM, and a RPI2 or a Banana Pi with 1G. It'd > have > > a UFS root on the SD card, and ZFS on the external drive. > > > > Any ideas? > > I am do install FreeBSD i386 10 on the VirtualBox VM with 384M RAM and > successful pass `make buildworld`. > > In the real world all depends on workload and minimal depends from FS > (UFS or ZFS). >