Concurrency scaling for write workloads is now generally available for Amazon Redshift
Amazon Redshift concurrency scaling is leveraged by thousands of customers to support virtually unlimited concurrent users and queries, and meet their SLAs for BI reports, dashboards and other analytics workloads. In addition to the read queries, Amazon Redshift concurrency scaling is now extended to support scaling of most common write operations performed as part of workloads such as data ingestion and processing. The write workloads support with concurrency scaling is available on Amazon Redshift RA3 instance types.