From owner-svn-doc-all@FreeBSD.ORG Thu Dec 13 13:07:13 2012 Return-Path: Delivered-To: svn-doc-all@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 9F4EEBD2; Thu, 13 Dec 2012 13:07:13 +0000 (UTC) (envelope-from eadler@FreeBSD.org) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:1900:2254:2068::e6a:0]) by mx1.freebsd.org (Postfix) with ESMTP id 6B5B98FC14; Thu, 13 Dec 2012 13:07:13 +0000 (UTC) Received: from svn.freebsd.org (localhost [127.0.0.1]) by svn.freebsd.org (8.14.5/8.14.5) with ESMTP id qBDD7DDa038900; Thu, 13 Dec 2012 13:07:13 GMT (envelope-from eadler@svn.freebsd.org) Received: (from eadler@localhost) by svn.freebsd.org (8.14.5/8.14.5/Submit) id qBDD7D13038899; Thu, 13 Dec 2012 13:07:13 GMT (envelope-from eadler@svn.freebsd.org) Message-Id: <201212131307.qBDD7D13038899@svn.freebsd.org> From: Eitan Adler Date: Thu, 13 Dec 2012 13:07:13 +0000 (UTC) To: doc-committers@freebsd.org, svn-doc-all@freebsd.org, svn-doc-head@freebsd.org Subject: svn commit: r40378 - head/en_US.ISO8859-1/books/faq X-SVN-Group: doc-head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-doc-all@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: "SVN commit messages for the entire doc trees \(except for " user" , " projects" , and " translations" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 13 Dec 2012 13:07:13 -0000 Author: eadler Date: Thu Dec 13 13:07:12 2012 New Revision: 40378 URL: http://svnweb.freebsd.org/changeset/doc/40378 Log: Minor wording fixes for the recently committed ZFS section. Reviewed by: bjk Approved by: bcr (mentor) Modified: head/en_US.ISO8859-1/books/faq/book.xml Modified: head/en_US.ISO8859-1/books/faq/book.xml ============================================================================== --- head/en_US.ISO8859-1/books/faq/book.xml Thu Dec 13 12:04:49 2012 (r40377) +++ head/en_US.ISO8859-1/books/faq/book.xml Thu Dec 13 13:07:12 2012 (r40378) @@ -4833,7 +4833,8 @@ C:\="DOS" are bundled up into transaction groups and written to disk when filled (Transaction Group Commit). However syscalls like &man.fsync.2; - require a commitment to stable storage before returning. + require a commitment that the data is written to stable + storage before returning. The ZIL is needed for writes that have been acknowledged as written but which are not yet on disk as part of a transaction. The transaction groups are timestamped. @@ -4893,10 +4894,10 @@ C:\="DOS" very heavily duplicated (such as virtual machine images, or user backups) it is possible that deduplication will do more harm than good. Another consideration is the - inability to revert deduplication status. If - deduplication is enabled, data written, and then dedup - is disabled, those blocks which were deduplicated will - not be duplicated until they are next modified. + inability to revert deduplication status. If data is + written when deduplication is enabled, disabling dedup + will not cause those blocks which were deduplicated to + be replicated until they are next modified. Deduplication can also lead to some unexpected situations. In particular deleting files may become much