99 lines
7.2 KiB
HTML
99 lines
7.2 KiB
HTML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html lang="en-us" xml:lang="en-us">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="security" content="public" />
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<meta name="Robots" content="index,follow" />
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<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
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<meta name="DC.Type" content="reference" />
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<meta name="DC.Title" content="Data integrity" />
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<meta name="abstract" content="Data integrity protects data from being destroyed or changed by unauthorized persons, system operation or hardware failures (such as physical damage to a disk), programming errors, interruptions before a job is completed (such as a power failure), or interference from running applications at the same time (such as serialization problems)." />
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<meta name="description" content="Data integrity protects data from being destroyed or changed by unauthorized persons, system operation or hardware failures (such as physical damage to a disk), programming errors, interruptions before a job is completed (such as a power failure), or interference from running applications at the same time (such as serialization problems)." />
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<meta name="DC.subject" content="data integrity, function, security" />
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<meta name="keywords" content="data integrity, function, security" />
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<meta name="DC.Relation" scheme="URI" content="rbafyprotect.htm" />
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<meta name="DC.Relation" scheme="URI" content="rbafycncr.htm" />
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<meta name="DC.Relation" scheme="URI" content="rbafyjourg.htm" />
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<meta name="DC.Relation" scheme="URI" content="rbafydicomm.htm" />
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<meta name="DC.Relation" scheme="URI" content="rbafysavepoint.htm" />
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<meta name="DC.Relation" scheme="URI" content="rbafyatomic.htm" />
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<meta name="DC.Relation" scheme="URI" content="rbafymovnow.htm" />
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<meta name="DC.Relation" scheme="URI" content="rbafysaverestore.htm" />
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<meta name="DC.Relation" scheme="URI" content="rbafydamagetolerance.htm" />
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<meta name="DC.Relation" scheme="URI" content="rbafyindexrecovery.htm" />
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<meta name="DC.Relation" scheme="URI" content="rbafycatalogintegrity.htm" />
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<meta name="DC.Relation" scheme="URI" content="rbafyuserasp.htm" />
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<meta name="DC.Relation" scheme="URI" content="rbafyiasp.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 1998, 2006" />
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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="rbafydataintex" />
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<meta name="DC.Language" content="en-us" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Data integrity</title>
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</head>
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<body id="rbafydataintex"><a name="rbafydataintex"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Data integrity</h1>
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<div><p>Data integrity protects data from being destroyed or changed by
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unauthorized persons, system operation or hardware failures (such as physical
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damage to a disk), programming errors, interruptions before a job is completed
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(such as a power failure), or interference from running applications at the
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same time (such as serialization problems).</p>
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</div>
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<div>
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<ul class="ullinks">
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<li class="ulchildlink"><strong><a href="rbafycncr.htm">Concurrency</a></strong><br />
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<dfn class="term">Concurrency</dfn> is the ability for multiple
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users to access and change data in the same table or view at the same time
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without risk of losing data integrity.</li>
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<li class="ulchildlink"><strong><a href="rbafyjourg.htm">Journaling</a></strong><br />
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The <span class="keyword">DB2<sup>®</sup> UDB for iSeries™</span> journal
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support supplies an audit trail and forward and backward recovery.</li>
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<li class="ulchildlink"><strong><a href="rbafydicomm.htm">Commitment control</a></strong><br />
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The <span class="keyword">DB2<sup>®</sup> UDB for iSeries™</span> commitment
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control support provides a means to process a group of database changes like
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update, insert, DDL, or delete operations as a single unit of work (transaction).</li>
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<li class="ulchildlink"><strong><a href="rbafysavepoint.htm">Savepoints</a></strong><br />
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<span>A <dfn class="term">savepoint</dfn> is a
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named entity that represents the state of data and schemas at a particular
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point in time within a unit of work. You can create savepoints within a transaction.
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If the transaction rolls back, changes are undone back to the specified savepoint,
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rather than to the beginning of the transaction.</span></li>
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<li class="ulchildlink"><strong><a href="rbafyatomic.htm">Atomic operations</a></strong><br />
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When running under COMMIT(*CHG), COMMIT(*CS), or COMMIT(*ALL), all operations are guaranteed to be atomic.</li>
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<li class="ulchildlink"><strong><a href="rbafymovnow.htm">Constraints</a></strong><br />
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<span class="keyword">DB2<sup>®</sup> UDB for iSeries™</span> supports
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unique, referential, and check constraints.</li>
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<li class="ulchildlink"><strong><a href="rbafysaverestore.htm">Save/restore</a></strong><br />
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The <span class="keyword">i5/OS™</span> save/restore
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functions are used to save tables, views, indexes, journals, journal receivers,
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sequences, SQL packages, SQL procedures, SQL triggers, user-defined functions,
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user-defined types, and schemas on disk (save file) or to some external media
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(tape or diskette).</li>
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<li class="ulchildlink"><strong><a href="rbafydamagetolerance.htm">Damage tolerance</a></strong><br />
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The server provides several mechanisms to reduce or eliminate damage caused by disk errors.</li>
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<li class="ulchildlink"><strong><a href="rbafyindexrecovery.htm">Index recovery</a></strong><br />
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<span class="keyword">DB2<sup>®</sup> UDB for iSeries™</span> supplies
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several functions to deal with index recovery. </li>
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<li class="ulchildlink"><strong><a href="rbafycatalogintegrity.htm">Catalog integrity</a></strong><br />
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Catalogs contain information about tables, views, SQL packages, sequences, indexes, procedures, functions, triggers, and parameters in a schema.</li>
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<li class="ulchildlink"><strong><a href="rbafyuserasp.htm">User auxiliary storage pool (ASP)</a></strong><br />
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A schema can be created in a user ASP by using the ASP clause on the CREATE COLLECTION and CREATE SCHEMA statements.</li>
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<li class="ulchildlink"><strong><a href="rbafyiasp.htm">Independent auxiliary storage pool (IASP)</a></strong><br />
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Independent disk pools are used to set up user databases on the iSeries™ server. </li>
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</ul>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rbafyprotect.htm" title="This topic describes the security plan for protecting SQL data from unauthorized users and the methods for ensuring data integrity.">Data protection</a></div>
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</div>
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</div>
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</body>
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</html>
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