From owner-svn-doc-projects@FreeBSD.ORG Thu Aug 15 02:39:22 2013 Return-Path: Delivered-To: svn-doc-projects@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTP id 69CF5FAE; Thu, 15 Aug 2013 02:39:22 +0000 (UTC) (envelope-from wblock@FreeBSD.org) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:1900:2254:2068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id 579622BDE; Thu, 15 Aug 2013 02:39:22 +0000 (UTC) Received: from svn.freebsd.org ([127.0.1.70]) by svn.freebsd.org (8.14.7/8.14.7) with ESMTP id r7F2dM4h091909; Thu, 15 Aug 2013 02:39:22 GMT (envelope-from wblock@svn.freebsd.org) Received: (from wblock@localhost) by svn.freebsd.org (8.14.7/8.14.5/Submit) id r7F2dMmC091908; Thu, 15 Aug 2013 02:39:22 GMT (envelope-from wblock@svn.freebsd.org) Message-Id: <201308150239.r7F2dMmC091908@svn.freebsd.org> From: Warren Block Date: Thu, 15 Aug 2013 02:39:22 +0000 (UTC) To: doc-committers@freebsd.org, svn-doc-projects@freebsd.org Subject: svn commit: r42549 - projects/zfsupdate-201307/en_US.ISO8859-1/books/handbook/zfs X-SVN-Group: doc-projects MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-doc-projects@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: SVN commit messages for doc projects trees List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 15 Aug 2013 02:39:22 -0000 Author: wblock Date: Thu Aug 15 02:39:21 2013 New Revision: 42549 URL: http://svnweb.freebsd.org/changeset/doc/42549 Log: Rewrite the introductory paragraph, fix miscellaneous errors. Modified: projects/zfsupdate-201307/en_US.ISO8859-1/books/handbook/zfs/chapter.xml Modified: projects/zfsupdate-201307/en_US.ISO8859-1/books/handbook/zfs/chapter.xml ============================================================================== --- projects/zfsupdate-201307/en_US.ISO8859-1/books/handbook/zfs/chapter.xml Thu Aug 15 02:28:43 2013 (r42548) +++ projects/zfsupdate-201307/en_US.ISO8859-1/books/handbook/zfs/chapter.xml Thu Aug 15 02:39:21 2013 (r42549) @@ -17,21 +17,33 @@ The Z File System (<acronym>ZFS</acronym>) - The Z file system, originally developed by &sun;, - is designed to future proof the file system by removing many of - the arbitrary limits imposed on previous file systems. ZFS - allows continuous growth of the pooled storage by adding - additional devices. ZFS allows you to create many file systems - (in addition to block devices) out of a single shared pool of - storage. Space is allocated as needed, so all remaining free - space is available to each file system in the pool. It is also - designed for maximum data integrity, supporting data snapshots, - multiple copies, and cryptographic checksums. It uses a - software data replication model, known as - RAID-Z. RAID-Z provides - redundancy similar to hardware RAID, but is - designed to prevent data write corruption and to overcome some - of the limitations of hardware RAID. + The Z File System + (ZFS) was developed at &sun; to address many of + the problems with current file systems. There were three major + design goals: + + + + Data integrity: checksums are created when data is written + and checked when data is read. If on-disk data corruption is + detected, the user is notified and recovery methods are + initiated. + + + + Pooled storage: physical storage devices are added to a + pool, and storage space is allocated from that shared pool. + Space is available to all file systems, and can be increased + by adding new storage devices to the pool. + + + + Performance: + + + + A complete list of ZFS features and + terminology is shown in . What Makes <acronym>ZFS</acronym> Different @@ -1168,7 +1180,7 @@ vfs.zfs.vdev.cache.size="5M"Snapshot The copy-on-write design of + linkend="zfs-term-cow">copy-on-write (COW) design of ZFS allows for nearly instantaneous consistent snapshots with arbitrary names. After taking a snapshot of a dataset (or a recursive snapshot of a @@ -1259,7 +1271,7 @@ vfs.zfs.vdev.cache.size="5M" @@ -1278,7 +1290,7 @@ vfs.zfs.vdev.cache.size="5M" LZ4 compression is only - available after &os; 9.2 + available after &os; 9.2.