TAILIEUCHUNG - Oracle® Database Advanced Replication

Oracle also uses locks to control concurrent access to data. When updating information, the data server holds that information with a lock until the update is submitted or committed. Until that happens, no one else can make changes to the locked information. This ensures the data integrity of the system. Oracle provides unique non-escalating row-level locking. Unlike other data servers that “escalate” locks to cover entire groups of rows or even the entire table, Oracle always locks only the row of information being updated. Because Oracle includes the locking information with the actual rows themselves, Oracle can lock an unlimited number. | ORACLe Oracle Database Advanced Replication 10g Release 2 B14226-02 November 2007 Oracle Database Advanced Replication 10g Release 2 B14226-02 Copyright 1996 2007 Oracle. All rights reserved. Primary Author Randy Urbano Contributors Nimar Arora Sukanya Balaraman Yuen Chan Al Demers Alan Downing Curt Elsbernd Yong Feng Jairaj Galagali Lewis Kaplan Jonathan Klein Anand Lakshminath Jing Liu Edwina Lu Pat McElroy Maria Pratt Arvind Rajaram Neeraj Shodhan Wayne Smith Jim Stamos Janet Stern Mahesh Subramaniam Lik Wong David Zhang The Programs which include both the software and documentation contain proprietary information they are provided under a license agreement containing restrictions on use and disclosure and are also protected by copyright patent and other intellectual and industrial property laws. Reverse engineering disassembly or decompilation of the Programs except to the extent required to obtain interoperability with other independently created software or as specified by law is prohibited. The information contained in this document is subject to change without notice. If you find any problems in the documentation please report them to us in writing. This document is not warranted to be error-free. Except as may be expressly permitted in your license agreement for these Programs no part of these Programs may be reproduced or transmitted in any form or by any means electronic or mechanical for any purpose. If the Programs are delivered to the United States Government or anyone licensing or using the Programs on behalf of the United States Government the following notice is applicable . GOVERNMENT RIGHTS Programs software databases and related documentation and technical data delivered to . Government customers are commercial computer software or commercial technical data pursuant to the applicable Federal Acquisition Regulation and agency-specific supplemental regulations. As such use duplication disclosure modification and adaptation of the .

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