Replicate Cassandra Data to Multiple Databases

Ready to get started?

Learn more or sign up for a free trial:

CData Sync



Replicate Cassandra data to disparate databases with a single configuration.

Always-on applications rely on automatic failover capabilities and real-time access to data. CData Sync for Cassandra integrates live Cassandra data into your mirrored databases, always-on cloud databases, and other databases such as your reporting server: Automatically synchronize with remote Cassandra data from Windows or any machine running Java.

You can use Sync's command-line interface (CLI) to easily control almost all aspects of the replication. You can use the CLI to replicate Cassandra data to one or many databases without any need to change your configuration.

Connect to Cassandra Data

You can save connection strings and other settings like email notifications in XML configuration files.

The following example shows how to replicate to SQLite.

Windows

<?xml version="1.0" encoding="UTF-8" ?> <CDataSync><DatabaseType>SQLite</DatabaseType> <DatabaseProvider>System.Data.SQLite</DatabaseProvider> <ConnectionString>Database=MyCassandraDB;Port=7000;Server=127.0.0.1;</ConnectionString> <ReplicateAll>False</ReplicateAll> <NotificationUserName></NotificationUserName> <DatabaseConnectionString>Data Source=C:\my.db</DatabaseConnectionString> <TaskSchedulerStartTime>09:51</TaskSchedulerStartTime> <TaskSchedulerInterval>Never</TaskSchedulerInterval> </CDataSync>

Java

<?xml version="1.0" encoding="UTF-8" ?> <CDataSync><DatabaseType>SQLite</DatabaseType><DatabaseProvider>org.sqlite.JDBC</DatabaseProvider> <ConnectionString>Database=MyCassandraDB;Port=7000;Server=127.0.0.1;</ConnectionString> <ReplicateAll>False</ReplicateAll> <NotificationUserName></NotificationUserName> <DatabaseConnectionString>Data Source=C:\my.db</DatabaseConnectionString> </CDataSync>

Set the Server, Port, and Database connection properties to connect to Cassandra. Additionally, to use internal authentication set the User and Password connection properties.

Configure Replication Queries

Sync enables you to control replication with standard SQL. The REPLICATE statement is a high-level command that caches and maintains a table in your database. You can define any SELECT query supported by the Cassandra API. The statement below caches and incrementally updates a table of Cassandra data:

REPLICATE Customer;

You can specify a file containing the replication queries. This enables you to use the same replication queries to replicate to several databases.

Run Sync

After you have configured the connection strings and replication queries, you can run Sync with the following command-line options:

Windows

CassandraSync.exe -g MySQLiteConfig.xml -f CassandraSync.sql

Java

java -Xbootclasspath/p:c:\sqlitejdbc.jar -jar CassandraSync.jar -g MySQLiteConfig.xml -f CassandraSync.sql