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The following sections describe how to set up a remote H2 database to replace the default H2 database in your WSO2 product:

When to use the H2 database?

You can use the embedded H2 database as the local registry in a registry mount.

However, the embedded H2 database is NOT recommended in enterprise testing and production environments. It has lower performance, clustering limitations, and can cause file corruption failures. Please use an industry-standard RDBMS such as Oracle, PostgreSQL, MySQL, or MS SQL instead.

Setting up the remote H2 database

Follow the steps below to set up a Remote H2 database.

  1. Download and install the H2 database engine on your computer as follows:

    For instructions on installing, see the H2 installation guide.

  2. Go to the <H2_HOME>/bin directory and run the H2 network server starting script as follows, where <H2_HOME> is the H2 installation directory:

  3. Run the H2 database server with the following commands:
    • For Linux:
      $ ./h2.sh
    • For Windows:
      $ h2.bat

    The script starts the database engine and opens a pop-up window.

  4. Click Start Browser to open a web browser containing a client application, which you use to connect to a database. If a database does not already exist by the name you provided in the JDBC URL text box, H2 will automatically create a database.

Setting up the drivers

WSO2 currently ships H2 database engine version h2-1.2.140.* and its related H2 database driver. If you want to use a different H2 database driver, take the following steps:

  1. Delete the following H2 database-related JAR file, which is shipped with WSO2 products:
    <PRODUCT_HOME>/repository/components/plugins/h2-database-engine_1.2.140.wso2v3.jar

  2. Find the JAR file of the new H2 database driver (<H2_HOME>/bin/h2-*.jar, where <H2_HOME> is the H2 installation directory) and copy it to your WSO2 product's <PRODUCT_HOME>/repository/components/lib directory.

What's next

Next, you need to configure your product with Embedded H2 database. For more information, see Changing to Remote H2.

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