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<h1>Using Your Application To Generate The IO Pattern</h1><p><font color="#990000">This topic applies to Java version only</font> </p>
When you execute IoBenchmark, it uses a simple CRUD (create, read,
update, delete) application as the target application. This application
is located in the com.db4o.bench.crud package.<br><br>If you want to use your own application for generating the I/O access patterns, here's what you have to do:
<ul><li>
Use a LoggingIoAdapter, delegating to your default IoAdapter:<br><br><code>RandomAccessFileAdapter rafAdapter = new RandomAccessFileAdapter();<br>IoAdapter ioAdapter = new LoggingIoAdapter(rafAdapter, "filename.log");<br>Configuration config = Db4o.cloneConfiguration();<br>config.io(ioAdapter);</code><br> <br>
You'll also find this code in <code>com.db4o.bench.crud.CrudApplication#prepare()</code>.</li><br><li>
Change IoBenchmark to call your application by modifying the <code>runTargetApplication()</code> method.<br>You also have to exchange the calls to <code>CrudApplication.logFileName(itemCount)</code> in <code>prepareDbFile()</code> and <code>runBenchmark</code><br>with the file name of the log containing the I/O access pattern of your application.<br>Using the code from above, this log file will be called "filename.log".
</li></ul>
If you want to generate your log by interacting with your application, rather than having IoBenchmark calling it, do as follows:<br><ul><li>Use a LoggingIoAdapter in your application</li><li>Interact with your application to create the log</li><li>Remove the stage 1 from IoBenchmark and make it start in stage 2 with your log.</li></ul>If you are using your own application to generate the I/O log file, check out the <a href="io_log_file_statistics.html" class="wikiLink">IO Log File Statistics</a> section further down.
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This revision (1) was last Modified 2008-02-03T14:12:38 by Tetyana.
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