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Server configuration - database technology

The Genesis low-code platform supports the following database technology:

  • FoundationDB
  • Postgres (PostgreSQL)
  • MSSQL
  • Aerospike

Because we abstract from the underlying technology, you can easily toggle between any of these four.

There are also tools that enable you to stream real-time data reliably to and from any classic Oracle/SQL database.

By default, FoundationDB is installed on the platform. You can easily change this if you want to use another supported database. Follow the steps below.

warning

If you do not set the database correctly, this will cause fundamental errors. You will not be able to run genesisInstall or remap correctly.

Changing the database technology​

1. Edit the system configuration file​

Edit the system definition file: ~/run/site-specific/cfg/genesis-system-definition.kts. Before you start, make sure you know the JDBC connection string for the database, which specifies the host, the username and password.

You need to make two changes.

First, go to the line item for DbLayer and change the value from FDB to SQL (for Postgres and MSSQL) or AEROSPIKE.

systemDefinition {
    global {
        item(name = "MqLayer", value = "ZeroMQ")
        item(name = "DbLayer", value = "SQL")
        item(name = "DictionarySource", value = "DB")

Then, insert a line in the hosts block to identify the JDBC connection string for the database. This points the system to the local Postgres, MSSQL or Aerospike server. For example:

item(name = "DbHost", value = "jdbc:postgresql://localhost:5432/postgres?user=postgres&password=Password5432")

Here is the example in place:

systems {
        system(name = "DEV") {
            hosts {
                host(name = "genesis-serv")
            }

            item(name = "DbHost", value = "jdbc:postgresql://localhost:5432/postgres?user=postgres&password=Password5432")
            item(name = "DbNamespace", value = "genesis")
            item(name = "ClusterPort", value = "6000")
            item(name = "Location", value = "LO")
            item(name = "LogFramework", value = "LOG4J2")
            item(name = "LogFrameworkConfig", value = "log4j2-default.xml")
        }
    }

For Aerospike, you might also want to update the DbNamespace and DbMode properties in the system definition file.

If you are using Postgres and you want to use a reserved keyword as a column name, then you need to add the setting below to your system definition file. This enables Quoted Identifiers to be used:

item(name = "DbQuotedIdentifiers", value = "true")

2. Activate the new configuration​

Run genesisInstall.

3. Create new default table structures​

Run remap --commit. This populates the database server with table structures.

4. Start the server and check​

When those three steps have been completed, run startServer to start all the processes.

On completion, run mon, and you can see the processes running. You have successfully completed the change.