This topic describes the specifications of standard hybrid-storage instances of ApsaraDB for Redis Enhanced Edition (Tair), such as the memory capacity, maximum number of concurrent connections to each instance, maximum bandwidth value, and queries per second (QPS) reference value.

Note Hybrid-storage instances are discontinued. For more information, see ApsaraDB for Redis hybrid-storage instances are discontinued. We recommend that you use Performance-enhanced instances that provide higher performance and more features.

Instance types

Instance type InstanceClass that is used in API operations Number of CPU cores Maximum number of new connections per second Maximum number of concurrent connections Maximum bandwidth value (MB/s) QPS reference value
Master-replica instance with 16 GB memory and 32 GB disk storage redis.amber.master.16g.2x.ext4.default 6 10,000 50,000 48 40,000
Master-replica instance with 16 GB memory and 64 GB disk storage redis.amber.master.16g.4x.ext4.default 6 10,000 50,000 48 40,000
Master-replica instance with 16 GB memory and 128 GB disk storage redis.amber.master.16g.8x.ext4.default 6 10,000 50,000 48 40,000
Master-replica instance with 32 GB memory and 64 GB disk storage redis.amber.master.32g.2x.ext4.default 6 10,000 50,000 48 40,000
Master-replica instance with 32 GB memory and 128 GB disk storage redis.amber.master.32g.4x.ext4.default 6 10,000 50,000 48 40,000
Master-replica instance with 32 GB memory and 256 GB disk storage redis.amber.master.32g.8x.ext4.default 6 10,000 50,000 48 40,000
Master-replica instance with 64 GB memory and 128 GB disk storage redis.amber.master.64g.2x.ext4.default 6 10,000 50,000 48 40,000
Master-replica instance with 64 GB memory and 256 GB disk storage redis.amber.master.64g.4x.ext4.default 6 10,000 50,000 48 40,000
Master-replica instance with 64 GB memory and 512 GB disk storage redis.amber.master.64g.8x.ext4.default 6 10,000 50,000 48 40,000

Calculation rules for bandwidth values

  • The bandwidth value in the preceding table is the bandwidth of the instance. The bandwidth value is the sum of the bandwidth of all shards or nodes on the instance.
  • The upper limit of the total bandwidth for a read/write splitting instance is 2,048 MB/s. The preceding table describes the upper limits. After the upper limit is reached, the bandwidth cannot be increased even if you add more shards or nodes.
  • The bandwidth value applies to the upstream and downstream bandwidths. For example, if the bandwidth of an instance is 10 MB/s, the upstream and downstream bandwidths of the instance are both 10 MB/s.
  • The bandwidth in the preceding table is the internal bandwidth of the ApsaraDB for Redis instance. The Internet bandwidth is determined by the internal bandwidth and is limited by the bandwidth of the connection between the instance and a client. We recommend that you use an internal network to maximize the performance of the instance.

Calculation rules for connections

The following example shows the maximum number of new connections that can be created per second: The maximum number of new connections per second of an instance is 10,000. The maximum number of connections of an instance is 50,000. The actual number of connections at the Nth second after the instance starts to run is 12,000. Then, at the (N+1)th second, the number of connections is 22,000, which is calculated by using the formula 12,000 + 10,000.