ApsaraDB for Redis provides multiple editions, series types, and architectures.

This topic describes the edition, series type, and architecture specifications of ApsaraDB for Redis instances. You can refer to the following table for more information about the required instance specifications.

Edition Series Type Architecture type Description
Community Edition None Standard master-replica instance A master-replica instance of ApsaraDB for Redis. The maximum memory capacity is 64 GB and the QPS reference value is approximately 80,000.
Master-replica cluster instances A cluster instance of ApsaraDB for Redis. Each data shard is deployed in a master-replica architecture. The instance with the highest capacity and performance contains 32 data shards and supports a memory capacity of 512 GB. The QPS reference value is approximately 2,560,000.
Read/Write Splitting An ApsaraDB for Redis instance that contains a master-replica architecture and one or more read replicas. The instance with the highest capacity and performance contains five read replicas and supports a memory capacity of 64 GB.
Read/write splitting cluster instances A read/write splitting instance of ApsaraDB for Redis that contains a cluster instance and one or more read replicas. Each shard in the cluster is attached to one read replica. The instance with the highest capacity and performance contains 32 shards and 32 read replicas, and supports a memory capacity of 512 GB.
ApsaraDB for Redis Enhanced Edition (Tair) Performance enhanced Standard master-replica instance A standard master-replica instance that uses multi-thread model provides the performance approximately three times that of an ApsaraDB for Redis Community Edition instance of the same specifications. The maximum memory capacity is 64 GB and the QPS reference value is approximately 240,000.
Cluster instances A cluster instance of ApsaraDB for Redis that uses multi-thread model supports several types of new data structures. Each data shard uses a master-replica architecture, and the performance is approximately three times that of an ApsaraDB for Redis Community Edition instance of the same specifications. The maximum memory capacity is 4,096 GB and the QPS reference value is approximately 61,440,000.
Read/Write Splitting A read/write splitting instance of ApsaraDB for Redis uses multi-thread model and contains a master-replica architecture and one or more read replicas. It provides the performance approximately three times that of an ApsaraDB for Redis Community Edition instance of the same specifications. The instance with the highest capacity and performance contains five read replicas and supports a memory capacity of 64 GB.
Hybrid storage Standard master-replica instances A hybrid-storage instance of ApsaraDB for Redis that is developed based on standard master-replica instances. The hybrid-storage instance supports storage in memory and disks. The instance with the highest capacity and performance supports a memory capacity of 64 GB and disk storage of up to 512 GB.
Cluster instances A cluster instance of ApsaraDB for Redis that supports storage in memory and disks. The instance with the highest capacity and performance supports a memory capacity of 1,024 GB and disk storage of up to 8,192 GB, and contains 16 shards.
Phased-out instance types N/A N/A This topic lists the ApsaraDB for Redis instances that are no longer available for purchase. If you have already purchased one or more of these instances, you can continue to use them. You can view the information about these specifications such as connection limit, bandwidth, and QPS reference value in Phased-out instance types.

FAQ

  • Q: Do I need to reserve snapshot memory resources as I do with AWS ElastiCache when I choose a specification?

    A: No. Alibaba Cloud provides the instances of ApsaraDB for Redis Community Edition and Enhanced Edition (Tair). Therefore, you do not need to reserve the memory required for snapshots. The memory capacity corresponding to the specifications is the maximum available memory under an account. The memory capacity includes the memory occupied by user data, the static memory consumed by the database, and the memory occupied by the network link. In the future, Alibaba Cloud may provide hosts to support your ApsaraDB for Redis service. You may need to follow the instructions in related documentation to reserve memory when you purchase the hosts.

  • Q: Why are some instance types not available?

    A: These instances may no longer be available to purchase. For more information, see Phased-out instance types.

  • Q: How can I check the specifications of an ApsaraDB for Redis instance by using InstanceClass?
    A: You can enter the value of InstanceClass in the search bar at the top of an Alibaba Cloud document.
  • Q: How do I test the performance of ApsaraDB for Redis instances?

    A: You can test the performance of ApsaraDB for Redis instances by using the methods described in Performance White Paper.