Automated Continuous AlloyDB Replication to Apache Cassandra

Always-on applications rely on automatic failover capabilities and real-time data access. CData Sync integrates live AlloyDB data into your Apache Cassandra instance, allowing you to consolidate all of your data into a single location for archiving, reporting, analytics, machine learning, artificial intelligence and more.

Configure Apache Cassandra as a Replication Destination

Using CData Sync, you can replicate AlloyDB data to Apache Cassandra. To add a replication destination, navigate to the Connections tab.

1. Click Add Connection.
2. Select the Destinations tab and locate the Cassandra connector.
3. Click the Configure Connection icon at the end of that row to open the New Connection page. If the Configure Connection icon is not available, click the Download Connector icon to install the Cassandra connector. For more information about installing new connectors, see Connections in the Help documentation.
4. To connect to Apache Cassandra, set the following connection properties:
   • Connection Name: Enter a connection name of your choice for the Cassandra connection.
   • Server: Enter the host name or the IP address of the server that hosts the Cassandra database. The default host name is localhost.
   • Port: Enter the port number of the server that hosts the Cassandra database. The default port value is 9042.
   • Database: Enter the name of the Cassandra keyspace that contains your tables.
   • Auth Scheme: Select the authentication scheme. The default setting is Basic.
   • User: Enter the username that you use to authenticate to the Cassandra database.
   • Password: Enter the password that you use to authenticate to the Cassandra database.
   • Use SSL: Specify whether you want to use the Secure Sockets Layer (SSL) protocol. The default value is False.
   • Consistency Level: Select the number of the replicas from which you want to enforce a response before queries are considered a success.

5. Once connected, click Create & Test to create, test and save the connection.

You are now connected to Apache Cassandra and can use it as both a source and a destination.

NOTE: You can use the Label feature to add a label for a source or a destination.

In this article, we will demonstrate how to load AlloyDB data into Apache Cassandra and utilize it as a destination.

Configure the AlloyDB Connection

You can configure a connection to AlloyDB from the Connections tab. To add a connection to your AlloyDB account, navigate to the Connections tab.

1. Click Add Connection.
2. Select a source (AlloyDB).
3. Configure the connection properties.
   
   

   The following connection properties are usually required in order to connect to AlloyDB.

   • Server: The host name or IP of the server hosting the AlloyDB database.
   • User: The user which will be used to authenticate with the AlloyDB server.
   • Password: The password which will be used to authenticate with the AlloyDB server.

   You can also optionally set the following:

   • Database: The database to connect to when connecting to the AlloyDB Server. If this is not set, the user's default database will be used.
   • Port: The port of the server hosting the AlloyDB database. This property is set to 5432 by default.

   Authenticating with Standard Authentication

   Standard authentication (using the user/password combination supplied earlier) is the default form of authentication.

   No further action is required to leverage Standard Authentication to connect.

   Authenticating with pg_hba.conf Auth Schemes

   There are additional methods of authentication available which must be enabled in the pg_hba.conf file on the AlloyDB server.

   Find instructions about authentication setup on the AlloyDB Server here.

   Authenticating with MD5 Authentication

   This authentication method must be enabled by setting the auth-method in the pg_hba.conf file to md5.

   Authenticating with SASL Authentication

   This authentication method must be enabled by setting the auth-method in the pg_hba.conf file to scram-sha-256.

   Authenticating with Kerberos

   The authentication with Kerberos is initiated by AlloyDB Server when the ∏ is trying to connect to it. You should set up Kerberos on the AlloyDB Server to activate this authentication method. Once you have Kerberos authentication set up on the AlloyDB Server, see the Kerberos section of the help documentation for details on how to authenticate with Kerberos.

4. Click Connect to AlloyDB to ensure that the connection is configured properly.
5. Click Save & Test to save the changes.

Configure Replication Queries

CData Sync enables you to control replication with a point-and-click interface and with SQL queries. For each replication you wish to configure, navigate to the Jobs tab and click Add Job. Select the Source and Destination for your replication.

Replicate Entire Tables

To replicate an entire table, navigate to the Task tab in the Job, click Add Tasks, choose the table(s) from the list of AlloyDB tables you wish to replicate into Apache Cassandra, and click Add Tasks again.

Customize Your Replication

Schedule Your Replication

Select the Overview tab in the Job, and click Configure under Schedule. You can schedule a job to run automatically by configuring it to run at specified intervals, ranging from once every 10 minutes to once every month.

Once you have configured the replication job, click Save Changes. You can configure any number of jobs to manage the replication of your AlloyDB data to Apache Cassandra.

Run the Replication Job

Once all the required configurations are made for the job, select the AlloyDB table you wish to replicate and click Run. After the replication completes successfully, a notification appears, showing the time taken to run the job and the number of rows replicated.

Free Trial & More Information

Now that you have seen how to replicate AlloyDB data into Apache Cassandra, visit our CData Sync page to explore more about CData Sync and download a free 30-day trial. Start consolidating your enterprise data today!

As always, our world-class Support Team is ready to answer any questions you may have.