By default in {product}:

* The maximum number of SAI indexes per table is 10.
The limit is set by `sai_indexes_per_table_failure_threshold` in cassandra.yaml.
* The maximum number of SAI indexes in the entire cluster is 100, as set by `sai_indexes_total_failure_threshold` in cassandra.yaml.
// See the https://docs.datastax.com/en/dse/6.8/dse-admin/datastax_enterprise/config/configCassandra_yaml.html#configCassandra_yaml__guardrailsYaml[guardrails] section of the cassandra.yaml reference topic.
