From owner-freebsd-fs@FreeBSD.ORG Tue Mar 3 04:21:27 2015 Return-Path: Delivered-To: freebsd-fs@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 7DBB38C8; Tue, 3 Mar 2015 04:21:27 +0000 (UTC) Received: from mail-ig0-x22e.google.com (mail-ig0-x22e.google.com [IPv6:2607:f8b0:4001:c05::22e]) (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 47BB419B1; Tue, 3 Mar 2015 04:21:27 +0000 (UTC) Received: by igbhn18 with SMTP id hn18so23437899igb.2; Mon, 02 Mar 2015 20:21:26 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:cc:content-type; bh=IXSXecv9KtXcKX9M74BEx/DYMDcyVLtWAPnkj3e/Coc=; b=QvSBnhD5UqL81u39pth1z+nCALwl/tAE+qW2fXjp+k2DYUDWcm1BGb2RGnJMe+4uZ3 W6I8vS9QBwvFtJswet39uVIDIoPeGEB73YGleiuZ4yp4vwSP+GQ6INLyd0iIB4dDZI0c vzumGf0WwcWLVwFte1ewISenTMj2U2d5/W5WxiitUYc5S4A19HWZs6LU1oVxuzjt7cAa mvCZP2mzOZSISOAeorwndl5dzOvIpj/iMjZCeKAFb7QADmTqfnv8VRCSMf3UmUwIcEC7 fZiWFHU0KGmswFcegot9BVKsNamIHeIFgPKHej5NyS4nRS0oczjCmXwKDgLsNzUzzly+ GxYg== MIME-Version: 1.0 X-Received: by 10.42.28.199 with SMTP id o7mr34846394icc.23.1425356486708; Mon, 02 Mar 2015 20:21:26 -0800 (PST) Received: by 10.36.111.202 with HTTP; Mon, 2 Mar 2015 20:21:26 -0800 (PST) Date: Mon, 2 Mar 2015 23:21:26 -0500 Message-ID: Subject: Zoned Commands ZBC/ZAC, Shingled SMR drives, ZFS From: grarpamp To: freebsd-fs@freebsd.org Content-Type: text/plain; charset=UTF-8 Cc: developer@open-zfs.org, zfs-devel@freebsd.org X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 03 Mar 2015 04:21:27 -0000 Performance, internals, and alternatives with SMR drives. https://www.usenix.org/conference/fast15/technical-sessions/presentation/aghayev http://sssl.ccs.neu.edu/skylight/ Note that "drive managed" is first gen. "Host aware" seems the ideal future state for filesystems. Also the specialization / adaptation of marketed tech to fitting roles... SMR (archive), standard HDD (middle ground), SSD (db/oltp), and RAM (extreme).