# Amazon Keyspaces (for Apache Cassandra) endpoints and quotas
<a name="keyspaces"></a>

To connect programmatically to an AWS service, you use an endpoint. AWS services offer the following endpoint types in some or all of the AWS Regions that the service supports: IPv4 endpoints, dual-stack endpoints, and FIPS endpoints. Some services provide global endpoints. For more information, see [AWS service endpoints](rande.md).

Service quotas, also referred to as limits, are the maximum number of service resources or operations for your AWS account. For more information, see [AWS service quotas](aws_service_limits.md).

The following are the service endpoints and service quotas for this service.

## Service endpoints
<a name="keyspaces_region"></a>


| Region Name | Region | Endpoint | Protocol | 
| --- | --- | --- | --- | 
| US East (Ohio) | us-east-2 |  cassandra.us-east-2.amazonaws.com <br /> cassandra.us-east-2.api.aws  | HTTPS and TLS<br />HTTPS and TLS | 
| US East (N. Virginia) | us-east-1 |  cassandra.us-east-1.amazonaws.com <br /> cassandra-fips.us-east-1.api.aws <br /> cassandra-fips.us-east-1.amazonaws.com <br /> cassandra.us-east-1.api.aws  | HTTPS and TLS<br />HTTPS and TLS<br />HTTPS and TLS<br />HTTPS and TLS | 
| US West (N. California) | us-west-1 |  cassandra.us-west-1.amazonaws.com <br /> cassandra.us-west-1.api.aws  | HTTPS and TLS<br />HTTPS and TLS | 
| US West (Oregon) | us-west-2 |  cassandra.us-west-2.amazonaws.com <br /> cassandra-fips.us-west-2.api.aws <br /> cassandra-fips.us-west-2.amazonaws.com <br /> cassandra.us-west-2.api.aws  | HTTPS and TLS<br />HTTPS and TLS<br />HTTPS and TLS<br />HTTPS and TLS | 
| Africa (Cape Town) | af-south-1 |  cassandra.af-south-1.amazonaws.com <br /> cassandra.af-south-1.api.aws  | HTTPS and TLS<br />HTTPS and TLS | 
| Asia Pacific (Hong Kong) | ap-east-1 |  cassandra.ap-east-1.amazonaws.com <br /> cassandra.ap-east-1.api.aws  | HTTPS and TLS<br />HTTPS and TLS | 
| Asia Pacific (Mumbai) | ap-south-1 |  cassandra.ap-south-1.amazonaws.com <br /> cassandra.ap-south-1.api.aws  | HTTPS and TLS<br />HTTPS and TLS | 
| Asia Pacific (Seoul) | ap-northeast-2 |  cassandra.ap-northeast-2.amazonaws.com <br /> cassandra.ap-northeast-2.api.aws  | HTTPS and TLS<br />HTTPS and TLS | 
| Asia Pacific (Singapore) | ap-southeast-1 |  cassandra.ap-southeast-1.amazonaws.com <br /> cassandra.ap-southeast-1.api.aws  | HTTPS and TLS<br />HTTPS and TLS | 
| Asia Pacific (Sydney) | ap-southeast-2 |  cassandra.ap-southeast-2.amazonaws.com <br /> cassandra.ap-southeast-2.api.aws  | HTTPS and TLS<br />HTTPS and TLS | 
| Asia Pacific (Tokyo) | ap-northeast-1 |  cassandra.ap-northeast-1.amazonaws.com <br /> cassandra.ap-northeast-1.api.aws  | HTTPS and TLS<br />HTTPS and TLS | 
| Canada (Central) | ca-central-1 |  cassandra.ca-central-1.amazonaws.com <br /> cassandra.ca-central-1.api.aws  | HTTPS and TLS<br />HTTPS and TLS | 
| Europe (Frankfurt) | eu-central-1 |  cassandra.eu-central-1.amazonaws.com <br /> cassandra.eu-central-1.api.aws  | HTTPS and TLS<br />HTTPS and TLS | 
| Europe (Ireland) | eu-west-1 |  cassandra.eu-west-1.amazonaws.com <br /> cassandra.eu-west-1.api.aws  | HTTPS and TLS<br />HTTPS and TLS | 
| Europe (London) | eu-west-2 |  cassandra.eu-west-2.amazonaws.com <br /> cassandra.eu-west-2.api.aws  | HTTPS and TLS<br />HTTPS and TLS | 
| Europe (Paris) | eu-west-3 |  cassandra.eu-west-3.amazonaws.com <br /> cassandra.eu-west-3.api.aws  | HTTPS and TLS<br />HTTPS and TLS | 
| Europe (Stockholm) | eu-north-1 |  cassandra.eu-north-1.amazonaws.com <br /> cassandra.eu-north-1.api.aws  | HTTPS and TLS<br />HTTPS and TLS | 
| Middle East (Bahrain) | me-south-1 |  cassandra.me-south-1.amazonaws.com <br /> cassandra.me-south-1.api.aws  | HTTPS and TLS<br />HTTPS and TLS | 
| Middle East (UAE) | me-central-1 |  cassandra.me-central-1.amazonaws.com <br /> cassandra.me-central-1.api.aws  | HTTPS and TLS<br />HTTPS and TLS | 
| South America (São Paulo) | sa-east-1 |  cassandra.sa-east-1.amazonaws.com <br /> cassandra.sa-east-1.api.aws  | HTTPS and TLS<br />HTTPS and TLS | 
|  AWS GovCloud (US-East) | us-gov-east-1 |  cassandra.us-gov-east-1.amazonaws.com <br /> cassandra.us-gov-east-1.api.aws  | HTTPS and TLS<br />HTTPS and TLS | 
|  AWS GovCloud (US-West) | us-gov-west-1 |  cassandra.us-gov-west-1.amazonaws.com <br /> cassandra.us-gov-west-1.api.aws  | HTTPS and TLS<br />HTTPS and TLS | 

For the following AWS Regions, FIPS endpoints are available.


| Region Name | Region | FIPS Endpoint | Protocol | 
| --- | --- | --- | --- | 
| US East (N. Virginia) | us-east-1 | cassandra-fips.us-east-1.amazonaws.com | TLS | 
| US West (Oregon) | us-west-2 | cassandra-fips.us-west-2.amazonaws.com | TLS | 

## Service quotas
<a name="quotas_keyspaces"></a>


| Name | Default | Adjustable | Description | 
| --- | --- | --- | --- | 
| Account-level read throughput quota (Provisioned mode) | Each supported Region: 80,000 |  [Yes](https://console.aws.amazon.com/servicequotas/home/services/cassandra/quotas/L-E7DB0CFF)  | The maximum number of aggregate read capacity units (RCUs) allocated for the account per region; applicable only for tables in provisioned read/write capacity mode. For more information, see https://docs.aws.amazon.com/keyspaces/latest/devguide/quotas.html | 
| Account-level write throughput quota (Provisioned mode) | Each supported Region: 80,000 |  [Yes](https://console.aws.amazon.com/servicequotas/home/services/cassandra/quotas/L-2C5B14BD)  | The maximum number of aggregate write capacity units (WCUs) allocated for the account per region; applicable only for tables in provisioned read/write capacity mode. For more information, see https://docs.aws.amazon.com/keyspaces/latest/devguide/quotas.html | 
| Concurrent DDL operations | Each supported Region: 50 | No | The maximum number of concurrent DDL operations allowed per region. For more information, see https://docs.aws.amazon.com/keyspaces/latest/devguide/quotas.html | 
| Keyspaces per region | Each supported Region: 256 |  [Yes](https://console.aws.amazon.com/servicequotas/home/services/cassandra/quotas/L-677FFD22)  | The maximum number of keyspaces that can be created per region. | 
| Max Schema size | Each supported Region: 358,400 Bytes | No | The maximum size for a table schema. For more information, see https://docs.aws.amazon.com/keyspaces/latest/devguide/quotas.html | 
| Max UDT name length | Each supported Region: 48 |  [Yes](https://console.aws.amazon.com/servicequotas/home/services/cassandra/quotas/L-964C49BD)  | The maximum number of characters in the UDT name. | 
| Max amount of data restored using Point-in-time Recovery (PITR) | Each supported Region: 5 Terabytes |  [Yes](https://console.aws.amazon.com/servicequotas/home/services/cassandra/quotas/L-4C49F3DB)  | The maximum size of data that can be restored using PITR within 24 hours. | 
| Max amount of data restored using add Region operations | Each supported Region: 10 Terabytes |  [Yes](https://console.aws.amazon.com/servicequotas/home/services/cassandra/quotas/L-7F2EAE05)  | The maximum size of data that can be concurrently restored by add Region operations. | 
| Max amount of direct child UDTs per UDT | Each supported Region: 10 |  [Yes](https://console.aws.amazon.com/servicequotas/home/services/cassandra/quotas/L-F90953AC)  | The maximum number of child UDTs supported for a UDT. | 
| Max amount of direct parent UDTs per UDT | Each supported Region: 10 |  [Yes](https://console.aws.amazon.com/servicequotas/home/services/cassandra/quotas/L-C63C913D)  | The maximum number of parent UDTs supported for a UDT. | 
| Max clustering key size | Each supported Region: 850 Bytes | No | The maximum combined size of all clustering columns. Up to 4 bytes of additional storage are added to the raw size of each clustering column for metadata. For more information, see https://docs.aws.amazon.com/keyspaces/latest/devguide/quotas.html | 
| Max concurrent table restores using Point-in-time Recovery (PITR) | Each supported Region: 4 |  [Yes](https://console.aws.amazon.com/servicequotas/home/services/cassandra/quotas/L-F41E662B)  | The maximum number of concurrent table restores using PITR per subscriber is 4 | 
| Max number of UDTs per AWS Region | Each supported Region: 256 |  [Yes](https://console.aws.amazon.com/servicequotas/home/services/cassandra/quotas/L-7A88D508)  | The maximum number of UDTs that can be created per region across all keyspaces. | 
| Max number of UDTs per table | Each supported Region: 50 |  [Yes](https://console.aws.amazon.com/servicequotas/home/services/cassandra/quotas/L-96FEFC6D)  | The maximum number of UDTs that a table can reference. | 
| Max number of tables per UDT | Each supported Region: 100 |  [Yes](https://console.aws.amazon.com/servicequotas/home/services/cassandra/quotas/L-089904FB)  | The Maximum number of tables that can refer to a particular UDT. | 
| Max partition key size | Each supported Region: 2,048 Bytes | No | The maximum size of the compound partition key. Up to 3 bytes of additional storage are added to the raw size of each column included in the partition key for metadata. For more information, see https://docs.aws.amazon.com/keyspaces/latest/devguide/quotas.html | 
| Max row size | Each supported Region: 1 Megabytes | No | The maximum size of a row, excluding static column data. For details see https://docs.aws.amazon.com/keyspaces/latest/devguide/quotas.html | 
| Max static data per logical partition | Each supported Region: 1 Megabytes | No | The maximum aggregate size of static data in a logical partition. For details see https://docs.aws.amazon.com/keyspaces/latest/devguide/quotas.html | 
| Max subqueries per IN SELECT statement | Each supported Region: 100 |  [Yes](https://console.aws.amazon.com/servicequotas/home/services/cassandra/quotas/L-2FC1B9A1)  | The maximum number of subqueries you can use for the IN keyword in a SELECT statement. | 
| Max write capacity for a table using change-data-capture (CDC) | Each supported Region: 40,000 |  [Yes](https://console.aws.amazon.com/servicequotas/home/services/cassandra/quotas/L-6632AD49)  | The maximum write capacity for Amazon Keyspaces tables with CDC enabled. This default quota only applies to tables in provisioned read/write capacity mode. | 
| Table-level read throughput quota | Each supported Region: 40,000 |  [Yes](https://console.aws.amazon.com/servicequotas/home/services/cassandra/quotas/L-17766544)  | The maximum read throughput (RCUs & RRUs per second) that can be allocated to a table in the region. For more information, see https://docs.aws.amazon.com/keyspaces/latest/devguide/quotas.html | 
| Table-level write throughput quota | Each supported Region: 40,000 |  [Yes](https://console.aws.amazon.com/servicequotas/home/services/cassandra/quotas/L-3D8ED127)  | The maximum write throughput (WCUs & WRUs per second) that can be allocated to a table per region. For more information, see https://docs.aws.amazon.com/keyspaces/latest/devguide/quotas.html | 
| Tables per region | Each supported Region: 256 |  [Yes](https://console.aws.amazon.com/servicequotas/home/services/cassandra/quotas/L-BF48748A)  | The maximum number of tables that can be created per region across all keyspaces. | 

For more information, see [Quotas for Amazon Keyspaces (for Apache Cassandra)](https://docs.aws.amazon.com/keyspaces/latest/devguide/quotas.html) in the *Amazon Keyspaces (for Apache Cassandra) Developer Guide*.