Quotas, naming rules and data types

Read Request Unit (RRU): Measure of read throughput, where the number of RRUs per read request is equal to the ceiling of read record's size divided into 4KB chunks. The minimum RRU per request is 0.

Write Request Unit (WRU): Measure of write throughput, where the number of WRUs per write request is equal to the ceiling of the written record's size divided into 1KB chunks. The minimum WRU per request is 1 (including delete operations).

Maximum number of feature groups per Amazon account: Soft limit of 100.

Maximum number of feature definitions per feature group: 2500.

Maximum number of RRU per record identifier: 2400 RRU per second.

Maximum number of WRU per record identifier: 500 WRU per second.

Max Read Capacity Units (RCU) that can be provisioned on a single feature group: 40000 RCU.

Max Write Capacity Units (WCU) that can be provisioned on a single feature group: 40000 WCU.

Max Read Capacity Units that can be provisioned across all feature groups in a region: 80000 RCU.

Max Write Capacity Units that can be provisioned across all feature groups in a region: 80000 WCU.

Maximum Transactions per second (TPS) per API per Amazon Web Services account: Soft limit of 10000 TPS per API excluding the BatchGetRecord API call, which has a soft limit of 500 TPS.

Maximum size of a record: 350KB.

Maximum size of a record identifier: 2KB.

Maximum size of a feature value: 350KB.

Maximum number of concurrent feature group creation workflows: 4.

BatchGetRecord API: Can contain as many as 100 records and can query up to 100 feature groups.

Reserved Words: The following are reserved words and cannot be used as feature names in feature definitions: is_deleted, write_time, and api_invocation_time.

String Feature Type: Strings are Unicode with UTF-8 binary encoding. The minimum length of a string can be zero, the maximum length is constrained by the maximum size of a record.

Fractional Feature Type: Fractional feature values must conform to a double precision floating point number as defined by the IEEE 754 standard.

Integral Feature Type: Feature Store supports integral values in the range of a 64-bit signed integer. Minimum value of -2⁶³ and a maximum value: 2⁶³ - 1.

Event Time Features: All feature groups have an event time feature with nanosecond precision. Any event time with lower than nanosecond precision will lead to backwards incompatibility. The feature can have a feature type of either String or Fractional.