AWS IoT Analytics now supports custom partitioning on AWS IoT Analytics data stores, enabling customers to partition their data stores based on both timestamp and non-timestamp attributes. You can use this feature to create partitioned data stores so that your queries can run more efficiently as they will scan less data and hence run faster. The option to define a custom partition scheme on an AWS IoT Analytics data store will be made available at the time of creation for both customer managed and service managed data stores. Partitions can be created either on top of channel message attributes or data store attributes resulting from pipeline activities.
Source:: Amazon AWS