This topic describes the specifications of read/write splitting instances of ApsaraDB for Redis Enterprise Edition. The specifications include the number of read-only replicas, memory capacity, maximum number of concurrent connections to each instance, maximum bandwidth, and queries per second (QPS) reference value.

Instance types

Instance type InstanceClass that is used in API operations Number of CPU cores Number of I/O threads Number of read replicas Bandwidth (MB/s) Maximum number of new connections per second Maximum number of concurrent connections QPS reference value
1 GB performance-enhanced read/write splitting instance (1 shard, 1 read-only replica) redis.amber.logic.splitrw.small.1db.1rodb.6proxy.multithread 12 4 1 192 20,000 480,000 480,000
2 GB performance-enhanced read/write splitting instance (1 shard, 1 read-only replica) redis.amber.logic.splitrw.mid.1db.1rodb.6proxy.multithread 12 4 1 192 20,000 480,000 480,000
4 GB performance-enhanced read/write splitting instance (1 shard, 1 read-only replica) redis.amber.logic.splitrw.stand.1db.1rodb.6proxy.multithread 12 4 1 192 20,000 480,000 480,000
8 GB performance-enhanced read/write splitting instance (1 shard, 1 read-only replica) redis.amber.logic.splitrw.large.1db.1rodb.6proxy.multithread 12 4 1 192 20,000 480,000 480,000
16 GB performance-enhanced read/write splitting instance (1 shard, 1 read-only replica) redis.amber.logic.splitrw.2xlarge.1db.1rodb.6proxy.multithread 12 4 1 192 20,000 480,000 480,000
32 GB performance-enhanced read/write splitting instance (1 shard, 1 read-only replica) redis.amber.logic.splitrw.4xlarge.1db.1rodb.6proxy.multithread 12 4 1 192 20,000 480,000 480,000
64 GB performance-enhanced read/write splitting instance (1 shard, 1 read-only replica) redis.amber.logic.splitrw.8xlarge.1db.1rodb.6proxy.multithread 12 4 1 192 20,000 480,000 480,000
1 GB performance-enhanced read/write splitting instance (1 shard, 3 read-only replicas) redis.amber.logic.splitrw.small.1db.3rodb.12proxy.multithread 24 4 3 384 40,000 480,000 960,000
2 GB performance-enhanced read/write splitting instance (1 shard, 3 read-only replicas) redis.amber.logic.splitrw.mid.1db.3rodb.12proxy.multithread 24 4 3 384 40,000 480,000 960,000
4 GB performance-enhanced read/write splitting instance (1 shard, 3 read-only replicas) redis.amber.logic.splitrw.stand.1db.3rodb.12proxy.multithread 24 4 3 384 40,000 480,000 960,000
8 GB performance-enhanced read/write splitting instance (1 shard, 3 read-only replicas) redis.amber.logic.splitrw.large.1db.3rodb.12proxy.multithread 24 4 3 384 40,000 480,000 960,000
16 GB performance-enhanced read/write splitting instance (1 shard, 3 read-only replicas) redis.amber.logic.splitrw.2xlarge.1db.3rodb.12proxy.multithread 24 4 3 384 40,000 480,000 960,000
32 GB performance-enhanced read/write splitting instance (1 shard, 3 read-only replicas) redis.amber.logic.splitrw.4xlarge.1db.3rodb.12proxy.multithread 24 4 3 384 40,000 480,000 960,000
64 GB performance-enhanced read/write splitting instance (1 shard, 3 read-only replicas) redis.amber.logic.splitrw.8xlarge.1db.3rodb.12proxy.multithread 1242 4 3 384 40000 480,000 960,000
1 GB performance-enhanced read/write splitting instance (1 shard, 5 read-only replicas) redis.amber.logic.splitrw.small.1db.5rodb.18proxy.multithread 36 4 5 576 50,000 480,000 1,440,000
2 GB performance-enhanced read/write splitting instance (1 shard, 5 read-only replicas) redis.amber.logic.splitrw.mid.1db.5rodb.18proxy.multithread 36 4 5 576 50,000 480,000 1,440,000
4 GB performance-enhanced read/write splitting instance (1 shard, 5 read-only replicas) redis.amber.logic.splitrw.stand.1db.5rodb.18proxy.multithread 36 4 5 576 50,000 480,000 1,440,000
8 GB performance-enhanced read/write splitting instance (1 shard, 5 read-only replicas) redis.amber.logic.splitrw.large.1db.5rodb.18proxy.multithread 36 4 5 576 50,000 480,000 1,440,000
16 GB performance-enhanced read/write splitting instance (1 shard, 5 read-only replicas) redis.amber.logic.splitrw.2xlarge.1db.5rodb.18proxy.multithread 36 4 5 576 50,000 480,000 1,440,000
32 GB performance-enhanced read/write splitting instance (1 shard, 5 read-only replicas) redis.amber.logic.splitrw.4xlarge.1db.5rodb.18proxy.multithread 36 4 5 576 50,000 480,000 1,440,000
64 GB performance-enhanced read/write splitting instance (1 shard, 5 read-only replicas) redis.amber.logic.splitrw.8xlarge.1db.5rodb.18proxy.multithread 36 4 5 576 50,000 480,000 1,440,000

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.