With CQLReplicator
To reduce the number of writes to the destination, CQLReplicator automatically removes duplicate replication events. With CQLReplicator, you can tune the replication of changes from the source database to the destination database, allowing for a near real time migration of data from Apache Cassandra to Amazon Keyspaces.
The following diagram shows the typical architecture of a CQLReplicator job using AWS Glue.
To allow access to Apache Cassandra running in a private VPC, configure an AWS Glue connection with the connection type Network.
To remove duplicates and enable key caching with the CQLReplicator job, configure Amazon Simple Storage Service (Amazon S3).
The CQLReplicator job streams verified source database changes directly to Amazon Keyspaces.

For more information about the migration process using CQLReplicator, see the
following post on the AWS Database blog Migrate Cassandra workloads to Amazon Keyspaces using CQLReplicator