Support for custom partitioning in Azure Synapse Link for Azure Cosmos DB was announced in preview at Microsoft Ignite. This capability improves query performance by enabling you to partition Azure Cosmos DB analytical store data using keys that are frequently used as query filters.
Learn about how you can use Azure Synapse Link for Azure Cosmos DB to analyze large volumes of operational data directly in near real-time with no ETL pipelines and no performance impact on transactional workloads