HCD runs on premises and in the cloud, and uses Mission Control for provisioning and management. HCD is intended for companies that must manage their database resources on non-commercial cloud providers, such as AWS, Google Cloud, and Microsoft Azure.

Astra DB allows you to create databases in minutes, with reduced complexity, fewer operational concerns, and an approachable entry point for developing your applications. Astra DB is a true database-as-a-service (DBaaS) offering that provides simplified database management with flexible pricing.

HCD runs on premises and in the cloud, and uses Mission Control for provisioning and management. HCD is intended for companies that must manage their database resources on non-commercial cloud providers, such as AWS, Google Cloud, and Microsoft Azure.

While you can run DSE on premises and in the cloud, HCD allows you to manage your database resources with modern architecture and a cloud-native approach.

DSE includes Advanced Workloads (DSE Search, Analytics, and Graph), which are not currently available in HCD. HCD will add more features and capabilities over time.

The following DataStax drivers are compatible with HCD:

There is no practical limit to the number of bytes an HCD database can store.

If you need to make firewall exceptions, HCD uses the following ports:

Yes, you can alter the namespace or keyspace name. You can also create a new namespace or keyspace with a different name.

This is the common error:

Invalid Request: Error from server: code=2200
[Invalid query] message="table TABLE_NAME does not exist"

When you create a table, the table name, keyspace name, or column name is case-sensitive. You can access case-sensitive characters using double quotes.

For example, see the SELECT statement below:

The NoSQL term originally referred to a new generation of databases that shunned SQL for other interfaces. The term NoSQL has recently become a catch-all term for post-relational "not-only SQL" databases that use a method of storage different from a relational, or SQL, database.

HCD is a distributed and highly available database that uses peer-to-peer communication. Data modeling in HCD is similar to relational databases while differing in key areas to provide blazing fast interaction. Relational databases use joins between tables for relationships. HCD uses denormalization to achieve more robust querying.

The Capacity Planning Guide provides recommendations for choosing hardware including number of CPUs, amount of RAM and type of disks appropriate for the workload and environment.

Mission Control is the next generation operations platform for deploying, managing, and maintaining HCD, DataStax Enterprise (DSE), and Apache Cassandra® clusters. It provides a web-based interface that simplifies management and operation of HCD clusters.

The Docker image can be deployed as a standalone container for development environments.

The recommended installation method is to deploy HCD using Mission Control. See Installing HCD.

HCD architecture allows any authorized user to connect to any node in any datacenter and access data using the Cassandra Query Language (CQL 3.4.5 protocol v5). For ease of use, CQL uses a similar syntax to SQL. The most basic way to interact with HCD is using the CQL shell, cqlsh. Using cqlsh, you can create keyspaces and tables, insert records and query tables, and much more. Other ways to interact with HCD are:

HCD provides several solutions for migrating data from other databases: DataStax Bulk Loader (DSBulk) is an open-source utility for loading or unloading data in CSV or JSON format into and out of HCD databases.

Storage Attached Indexing (SAI) is a highly-scalable, globally-distributed index for Apache Cassandra® that is available for HCD databases.

Explore this deep dive on Storage Attached Indexing.

DataStax is committed to data privacy and security. This commitment includes robust security measures and compliance standards, such as HIPAA, SOC2 Type 2, and ISO 27001.

For more information, see the DataStax Trust Center.