From owner-freebsd-jail@freebsd.org Sun Feb 19 14:27:42 2017 Return-Path: Delivered-To: freebsd-jail@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 8FCF4CE5EBF for ; Sun, 19 Feb 2017 14:27:42 +0000 (UTC) (envelope-from nvass@gmx.com) Received: from mout.gmx.net (mout.gmx.net [212.227.15.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "mout.gmx.net", Issuer "TeleSec ServerPass DE-2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id E4AA9AF8 for ; Sun, 19 Feb 2017 14:27:41 +0000 (UTC) (envelope-from nvass@gmx.com) Received: from iris.berlin.strato.de ([192.166.200.216]) by mail.gmx.com (mrgmx002 [212.227.17.184]) with ESMTPSA (Nemesis) id 0MKIEQ-1ch7332UAo-001gnG; Sun, 19 Feb 2017 15:20:55 +0100 Subject: Re: unionfs and nullfs combination To: Kurt Jaeger References: <72a56f7e-8e71-2b98-0978-6de863013ce5@gmx.com> <20170219115633.GW13006@home.opsec.eu> Cc: freebsd-jail@freebsd.org From: Nikos Vassiliadis Message-ID: <6a3bc22c-b203-2bda-c822-cb80b9368037@gmx.com> Date: Sun, 19 Feb 2017 15:20:49 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.6.0 MIME-Version: 1.0 In-Reply-To: <20170219115633.GW13006@home.opsec.eu> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit X-Provags-ID: V03:K0:RWvhmQS/1H60WYwOPostUhF71EC55SswmDPy9S5IFeWV6zKmm4E Z/w+/tAZsNI7ndjsEKagEFMKKEm5/YhkYAz/SZQpb2jGGeFDTaddvwDAgJW4isz9n1u5rH2 H1Ej8I8wkcvoHYYRmgINDaAQ+zpP+YYqVOCHnlDVyrvaHQ0b3cYyUkKo9fkxDSpn5iXptKI xnFH3uMpVZ9e/KXeirXBg== X-UI-Out-Filterresults: notjunk:1;V01:K0:XXtJ6l1U/Vo=:DDRa6D+jWjBW2Hv6Ctz1ez +Ix3fF0bYlqPALPmnUN6pUpG3DGHdNCNYrLSGt3uBSItD/yKscJFVTBL3fazcxEao3iPLxwr2 bQr+aGPfmfG5q35qa0Mem1sIDsXVrDRmiQgG5GxxzFcZtbxwu+0keWUujH1HaDgsjofO5YnUw TZ+fgatSBsIZ2BBMRSxECvx8yGc2Xkts7FAsr4kkOfPXyC2FMrIO4neNS/Fk4RqeSr0OGhfWY e+UgJMvluJ4UBVB/SHDsrNWnmgiSc52tTjybnJ21mtl78NfXFPgGVrr4HE6vFLudExdEp24tb 0Coab8PsWRJuY8DMkjh1gjJVTx6zjI4TxZTsJWUk/VYuduFzKo/21LuVwBZ83vZULOoI+CTPE 9FSDXnmNmAGFBTmEgp1jgRkKBqbkI9eTP0t9S7yG3DiFGjYCAvnR4y9QTkdZRPCHk2CBux1OQ WagOFQx375kQeWW3XTVFIdJpXiUABSKHcOIgH1S2EsZ8kaNcPjjZrG9QVrrxSVhK3fg5Bh6RJ LjYlqHlMHtpY9Sgd8SFwDhufFZdxY0MzncyzphQ3Sdtw5vkuJTFCkW7iR/UXafiRzVfC3eER5 XDuVN7cXaKM9Lz69n8lK7w548ysNjLX/GrfT5psuWbNUkmnmjXz03WVHkbVcA/rCynhuic9zX /9dwz51tonAqSz5L1erryoODGFdYkpZlN6zKsP2hz8e95v3etKnuapHjUJvSzSg0cT3fvj33l TGDTWqKPwEjgbfUHTuYOma8MG8Lr8TCXQoJATt8V0W/GEQXk2qk2QF1rZ3IwFD1SQBYiEIoGe zqJcCMB X-BeenThere: freebsd-jail@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: "Discussion about FreeBSD jail\(8\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 19 Feb 2017 14:27:42 -0000 Hi Kurt, On 02/19/2017 12:56 PM, Kurt Jaeger wrote: > We had this running with FreeBSD 6.x, but unionfs had issues, > among them the whiteout problem. I am not sure exactly when unionfs was re-written... Sometime during 7-CURRENT but I am not sure if everything was backported to 6. >> It seems like a very relevant feature nowadays, when people >> use all these cloud-based systems, which oftentimes have little >> resources to run ZFS and UFS is most likely a better choice... > > Funny, I have the impression that disk space, RAM and CPU are > plenty compared to the past, so I would prefer ZFS anytime now. > Our next jail box will probably use ZFS dedup with lots of RAM. > Very true. And I love ZFS. I am talking about cloud installations where VM are created and destroyed in a fast pace and are mostly small like 1GB of RAM. UFS is very relevant for such installations. And being able to be cloud-friendly is a good thing:) Nikos