The configuration file uses XML format. Let's look at a very basic configuration file, just to get an idea of its contents. You will learn the meaning of each line as you read the rest of this section.
Example Configuration File
<?xml version="1.0" encoding="ISO-8859-1"?>
<!-- A Configuration file may be used by several
persistence services specifying multiple
<persistence_service> entries
-->
<dds>
<!-- QoS LIBRARY SECTION -->
<qos_library name="QosLib1">
<qos_profile name="QosProfile1">
<datawriter_qos name="WriterQos1">
<history>
<kind>DDS_KEEP_ALL_HISTORY_QOS</kind>
</history>
</datawriter_qos>
<datareader_qos name="ReaderQos1">
<reliability>
<kind>DDS_RELIABLE_RELIABILITY_QOS</kind>
</reliability>
<history>
<kind>DDS_KEEP_ALL_HISTORY_QOS</kind>
</history>
</datareader_qos>
</qos_profile>
</qos_library>
<!-- PERSISTENCE SERVICE SECTION -->
<persistence_service name="Srv1">
<!-- REMOTE ADMINISTRATION SECTION -->
<administration>
<domain_id>72</domain_id>
<distributed_logger>
<enabled>true</enabled>
</distributed_logger>
</administration>
<!-- PERSISTENT STORAGE SECTION -->
<persistent_storage>
<filesystem>
<directory>/tmp</directory>
<file_prefix>PS</file_prefix>
</filesystem>
</persistent_storage>
<!-- DOMAINPARTICIPANT SECTION -->
<participant name="Part1">
<domain_id>71</domain_id>
<!-- PERSISTENCE GROUP SECTION -->
<persistence_group name="PerGroup1" filter="*">
<single_publisher>true</single_publisher>
<single_subscriber>true</single_subscriber>
<datawriter_qos base_name="QosLib1::QosProfile1"/>
<datareader_qos base_name="QosLib1::QosProfile1"/>
</persistence_group>
</participant>
</persistence_service>
</dds>
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