Cassandra is an open source database that you can use to provide the backing store for a scalable, high-performance solution for collecting time series data like virtual machine metrics. Data sent to and stored in the Cassandra cluster can be sensitive and should be protected.
In addition to being placed on a dedicated management network, your Cassandra infrastructure should be secured with SSL.
Enable Cassandra Client-to-Node Encryotion
See the Cassandra Client-to-node encryption page for information about installing SSL certificates and enabling encryption.
We recommend using certificates that have been signed by a well-known CA. When you do this, no additional configuration is required in vCloud Director. If you are using self-signed certificates, you must import them manually into vCloud Director Director. Use the cell management tool's import-trusted-certificates command as shown in Importing SSL Certificates from External Services in the vCloud Director Administrator's Guide