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DataStax Astra DB Classic Documentation

    • Overview
      • Release notes
      • Astra DB FAQs
      • Astra DB glossary
      • Get support
    • Getting Started
      • Grant a user access
      • Load and retrieve data
        • Use DSBulk to load data
        • Use Data Loader in Astra Portal
      • Connect a driver
      • Build sample apps
      • Use integrations
        • Connect with DataGrip
        • Connect with DBSchema
        • Connect with JanusGraph
        • Connect with Strapi
    • Planning
      • Plan options
      • Database regions
    • Securing
      • Security highlights
      • Security guidelines
      • Default user permissions
      • Change your password
      • Reset your password
      • Authentication and Authorization
      • Astra DB Plugin for HashiCorp Vault
    • Connecting
      • Connecting to a VPC
      • Connecting Change Data Capture (CDC)
      • Connecting CQL console
      • Connect the Spark Cassandra Connector to Astra
      • Drivers for Astra DB
        • Connecting C++ driver
        • Connecting C# driver
        • Connecting Java driver
        • Connecting Node.js driver
        • Connecting Python driver
        • Drivers retry policies
      • Connecting Legacy drivers
      • Get Secure Connect Bundle
    • Migrating
      • FAQs
      • Preliminary steps
        • Feasibility checks
        • Deployment and infrastructure considerations
        • Create target environment for migration
        • Understand rollback options
      • Phase 1: Deploy ZDM Proxy and connect client applications
        • Set up the ZDM Automation with ZDM Utility
        • Deploy the ZDM Proxy and monitoring
          • Configure Transport Layer Security
        • Connect client applications to ZDM Proxy
        • Manage your ZDM Proxy instances
      • Phase 2: Migrate and validate data
      • Phase 3: Enable asynchronous dual reads
      • Phase 4: Change read routing to Target
      • Phase 5: Connect client applications directly to Target
      • Troubleshooting
        • Troubleshooting tips
        • Troubleshooting scenarios
      • Additional resources
        • Glossary
        • Contribution guidelines
        • Release Notes
    • Managing
      • Managing your organization
        • User permissions
        • Pricing and billing
        • Audit Logs
        • Configuring SSO
          • Configure SSO for Microsoft Azure AD
          • Configure SSO for Okta
          • Configure SSO for OneLogin
      • Managing your database
        • Create your database
        • View your databases
        • Database statuses
        • Use DSBulk to load data
        • Use Data Loader in Astra Portal
        • Monitor your databases
        • Manage multiple keyspaces
        • Using multiple regions
        • Terminate your database
        • Resize your classic database
        • Park your classic database
        • Unpark your classic database
      • Managing with DevOps API
        • Managing database lifecycle
        • Managing roles
        • Managing users
        • Managing tokens
        • Managing multiple regions
        • Get private endpoints
        • AWS PrivateLink
        • Azure PrivateLink
        • GCP Private Service
    • Astra CLI
    • Developing with Stargate APIs
      • Develop with REST
      • Develop with Document
      • Develop with GraphQL
        • Develop with GraphQL (CQL-first)
        • Develop with GraphQL (Schema-first)
      • Develop with gRPC
        • gRPC Rust client
        • gRPC Go client
        • gRPC Node.js client
        • gRPC Java client
      • Develop with CQL
      • Tooling Resources
      • Node.js Document API client
      • Node.js REST API client
    • Stargate QuickStarts
      • Document API QuickStart
      • REST API QuickStart
      • GraphQL API CQL-first QuickStart
    • API References
      • DevOps REST API v2
      • Stargate Document API v2
      • Stargate REST API v2

Create or delete keyspace and table schema

In order to use the REST API, you must create schema that defines at least one keyspace and one table that will store the data. A keyspace is a container for which a replication factor defines the number of data replicas the database will store. Tables consist of columns that each have a name and a defined data type. Multiple tables are contained in a keyspace, but a table cannot be contained in multiple keyspaces. If you are connecting to a Cassandra database with existing schema, you can skip this step.

For keyspaces, an optional setting, replicas, defines the number of data replicas the database will store for the keyspace. If no replica is defined, then for a keyspace in a single datacenter cluster, the default is 1, and for a multiple-datacenter cluster, the default is 3 for each datacenter.

Create a keyspace

Simple keyspace

Send a POST request to /api/rest/v2/schemas/keyspaces. In this example we use users_keyspace for the name, and no replicas setting, to default to 1.

  • cURL command (/v2)

  • Result

curl -s --location --request POST 'https://$ASTRA_CLUSTER_ID-$ASTRA_REGION.apps.astra.datastax.com/api/rest/v2/schemas/keyspaces' \
--header "X-Cassandra-Token: $AUTH_TOKEN" \
--header 'Content-Type: application/json' \
--data '{
    "name": "users_keyspace"
}'
{"name":"users_keyspace"

The authorization token and the content type are passed with --header. The token must be identified as X-Cassandra-Token so that cluster recognizes the token and its value. The specified name for the keyspace is passed as JSON data using --data. For shorthand, cURL can use -L for --location, -X for --request, -H for --header, and -d for --data.

Set replicas in simple keyspace

Send a POST request to /api/rest/v2/schemas/keyspaces. In this example we use users_keyspace for the name, and 1 for the number of data replicas.

  • cURL command (/v2)

  • Result

curl -s -L -X POST https://$ASTRA_CLUSTER_ID-$ASTRA_REGION.apps.astra.datastax.com/api/rest/v2/schemas/keyspaces \
-H "X-Cassandra-Token: $ASTRA_DB_APPLICATION_TOKEN" \
-H "Content-Type: application/json" \
-d '{
    "name": "users_keyspace",
    "replicas": 1
}'
{"name":"users_keyspace"

Keyspace for multiple datacenters

For a multiple-datacenter cluster, a keyspace is defined datacenters. Send a POST request to /api/rest/v2/schemas/keyspaces. In this example we use users_keyspace-dcs for the name, the datacenters are dc1 and dc2, where dc1 defaults to 3 replicas and dc2 is set to 5 replicas.

  • cURL command (/v2)

  • Result

curl -s -L -X POST 'https://$ASTRA_CLUSTER_ID-$ASTRA_REGION.apps.astra.datastax.com/api/rest/v2/schemas/keyspaces' \
-H "X-Cassandra-Token: $AUTH_TOKEN" \
-H 'Content-Type: application/json' \
-d '{
    "name": "users_keyspace-dcs",
    "datacenters": [ {"name": "dc1"}, {"name": "dc2", "replicas": 5} ]
}'
{"name":"users_keyspace-dcs"}

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