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<h1 class="topictitle1">Commitment control concepts</h1>
<div><p>This topic provides information to help you understand how commitment
control works, how it interacts with your system, and how it interacts with
other systems in your network.</p>
</div>
<div>
<ul class="ullinks">
<li class="ulchildlink"><strong><a href="rzakjhowworks.htm">How commitment control works</a></strong><br />
Commitment control is a function that allows you to define and process a group of changes to resources, such as database files or tables, as a transaction.</li>
<li class="ulchildlink"><strong><a href="rzakjrollbacks.htm">How commit and rollback operations work</a></strong><br />
Commit and rollback operations affect changes that are made under commitment control.</li>
<li class="ulchildlink"><strong><a href="rzakjcommitdef.htm">Commitment definition</a></strong><br />
You create a commitment definition when you use the Start Commitment
Control (STRCMTCTL) command to start commitment control on your system. Also, DB2
Universal Database™ (UDB) for iSeries™ automatically creates a commitment
definition when the isolation level is other than No Commit.</li>
<li class="ulchildlink"><strong><a href="rzakjresources.htm">How commitment control works with objects</a></strong><br />
When you place an object under commitment control, it becomes a committable resource. It is registered with the commitment definition. It participates in each commit operation and rollback operation that occurs for that commitment definition.</li>
<li class="ulchildlink"><strong><a href="rzakjiasp.htm">Commitment control and independent disk pools</a></strong><br />
Independent disk pools and independent disk pool groups, can each
have a separate i5/OS™ SQL
database. You can use commitment control with these databases. </li>
<li class="ulchildlink"><strong><a href="rzakjmiscconsid.htm">Considerations and restrictions for commitment control</a></strong><br />
The topic talks about miscellaneous considerations and restrictions for commitment control.</li>
<li class="ulchildlink"><strong><a href="rzakjcommitbatch.htm">Commitment control for batch applications</a></strong><br />
Batch applications might or might not need commitment control. In some cases, a batch application can perform a single function of reading an input file and updating a master file. However, you can use commitment control for this type of application if it is important to start it again after an abnormal end.</li>
<li class="ulchildlink"><strong><a href="rzakjtwophase.htm">Two-phase commitment control</a></strong><br />
Two-phase commitment control ensures that committable resources on multiple systems remain synchronized.</li>
<li class="ulchildlink"><strong><a href="rzakjxatransaction.htm">XA transaction support for commitment control</a></strong><br />
DB2
Universal Database™ (UDB) for iSeries™ can participate in X/Open global
transactions. </li>
<li class="ulchildlink"><strong><a href="rzakjthreadscoped.htm">SQL server mode and thread-scoped transactions for commitment control</a></strong><br />
Commitment definitions with job-scoped locks are normally scoped to an activation group.</li>
</ul>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="rzakjcommitkickoff.htm" title="Commitment control is a function that ensures data integrity. It allows you to define and process a group of changes to resources, such as database files or tables, as a transaction.">Commitment control</a></div>
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