jdbc/src/test/resources/META-INF/persistence.xml

<?xml version="1.0" encoding="UTF-8" ?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd"
             version="1.0">

  <persistence-unit name="jclouds-test-hsqldb" transaction-type="RESOURCE_LOCAL">
    <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>

    <class>org.jclouds.jdbc.entity.ContainerEntity</class>
    <class>org.jclouds.jdbc.entity.BlobEntity</class>
    <class>org.jclouds.jdbc.entity.ChunkEntity</class>
    <class>org.jclouds.jdbc.entity.PayloadEntity</class>
    <exclude-unlisted-classes>true</exclude-unlisted-classes>

    <properties>
      <property name="hibernate.dialect" value="org.hibernate.dialect.HSQLDialect" />
      <property name="hibernate.connection.driver_class" value="org.hsqldb.jdbcDriver" />
      <!-- Hsqldb must be set to multiversion concurrency control to run the tests correctly -->
      <property name="hibernate.connection.url" value="jdbc:hsqldb:file:target/testdb;shutdown=true;sql.enforce_strict_size=true;hsqldb.tx=mvcc" />
      <property name="hibernate.connection.user" value="sa" />
      <!-- Allow hibernate to generate our schema -->
      <property name="hibernate.hbm2ddl.auto" value="create" />
      <property name="hibernate.order_updates" value="true" />
      <property name="hibernate.order_inserts" value="true" />
    </properties>
  </persistence-unit>

  <persistence-unit name="jclouds-test-h2" transaction-type="RESOURCE_LOCAL">
    <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>

    <class>org.jclouds.jdbc.entity.ContainerEntity</class>
    <class>org.jclouds.jdbc.entity.BlobEntity</class>
    <class>org.jclouds.jdbc.entity.ChunkEntity</class>
    <class>org.jclouds.jdbc.entity.PayloadEntity</class>
    <exclude-unlisted-classes>true</exclude-unlisted-classes>

    <properties>
      <property name="javax.persistence.jdbc.driver" value="org.h2.Driver" />
      <property name="javax.persistence.jdbc.url" value="jdbc:h2:./target/h2-2" />
      <property name="javax.persistence.jdbc.user" value="sa" />
      <!-- Allow eclipselink to generate our schema -->
      <property name="eclipselink.ddl-generation" value="drop-and-create-tables" />
      <property name="eclipselink.ddl-generation.output-mode" value="database" />
    </properties>
  </persistence-unit>

</persistence>