ApsaraDB for Redis hybrid-storage instances are no longer available for purchase. We recommend that you purchase persistent memory-optimized instances for better user experience.

Effective date

May 28, 2021


Yes, you have purchased hybrid-storage instances.You can continue to use existing hybrid-storage instances.
No, but you plan to purchase hybrid-storage instances.You cannot select ApsaraDB for Redis hybrid-storage instances when you create ApsaraDB for Redis instances.


ApsaraDB for Redis Enhanced Edition (Tair) is a distributed NoSQL database service that features high availability and high performance. ApsaraDB for Redis Enhanced Edition (Tair) provides various series of instances based on storage media such as DRAM, NVM, and enhanced SSDs (ESSDs) to meet your requirements for low-latency access, persistence, and reduced overall costs. ApsaraDB for Redis Enhanced Edition (Tair) provides you with higher performance, more data structures, and more flexible storage methods to meet business requirements in different scenarios. For more information, see Overview.

  • DRAM-based instances: DRAM-based instances use the multi-threading model and provide read and write performance approximately three times that of ApsaraDB for Redis Community Edition instances with the same specifications. DRAM-based instances also provide multiple enhanced data structure modules to eliminate your concerns about storage structures and timeliness and allow you to focus on application development.
  • Persistent memory-optimized instances: Persistent memory-optimized instances adopt persistent memory to provide large-capacity in-memory databases that are compatible with open source Redis. A persistent memory-optimized instance does not use disks to implement data persistence. Compared with an ApsaraDB for Redis Community Edition instance, it reduces costs by up to 30% and provides performance similar to an ApsaraDB for Redis Community Edition instance in terms of throughput and latency while maintaining the persistence of each operation. This helps improve the reliability of business data.
  • ESSD-based instances: ESSD-based instances were developed based on ESSDs and are compatible with core data structures and APIs of open source Redis. These instances can provide large-capacity, low-cost, and persistent database services. ESSD-based instances reduce costs and improve data reliability. Additionally, ESSD-based instances reduce the amount of reserved memory that is required for the forks of open source Redis.