Redis 6.0/7.0 Instance Specifications

This section describes DCS Redis 6.0/7.0 instance specifications, including the total memory, available memory, maximum number of connections, maximum/assured bandwidth, and reference performance.

The following metrics are related to the instance specifications:

Used memory: You can check the memory usage of an instance by viewing the Memory Usage and Used Memory metrics.
Maximum connections: The maximum number of connections allowed is the maximum number of clients that can be connected to an instance. This metric is implemented by the maxclients parameter. To modify this parameter, go to the Instance Configuration > Parameters page on the console. To check the number of connections to an instance, view the Connected Clients metric.
QPS represents queries per second, which is the number of commands processed per second.
Bandwidth: You can view the Flow Control Times metric to check whether the bandwidth has exceeded the limit.

Currently, DCS for Redis 6.0 supports single-node, master/standby, and Redis Cluster instances based on x86 CPUs.

Single-Node

**Table 1** Specifications of single-node DCS Redis 6.0/7.0 instances
Total Memory (GB)	Available Memory (GB)	Max. Connections (Default/Limit) (Count)	Assured/Maximum Bandwidth (Mbit/s)	Reference Performance (QPS)	Specification Code (spec_code in the API)
0.125	0.125	10,000/10,000	40/40	80,000	redis.single.xu1.tiny.128
0.25	0.25	10,000/10,000	80/80	80,000	redis.single.xu1.tiny.256
0.5	0.5	10,000/10,000	80/80	80,000	redis.single.xu1.tiny.512
1	1	10,000/50,000	80/80	80,000	redis.single.xu1.large.1
2	2	10,000/50,000	128/128	80,000	redis.single.xu1.large.2
4	4	10,000/50,000	192/192	80,000	redis.single.xu1.large.4
8	8	10,000/50,000	192/192	100,000	redis.single.xu1.large.8
16	16	10,000/50,000	256/256	100,000	redis.single.xu1.large.16
24	24	10,000/50,000	256/256	100,000	redis.single.xu1.large.24
32	32	10,000/50,000	256/256	100,000	redis.single.xu1.large.32
48	48	10,000/50,000	256/256	100,000	redis.single.xu1.large.48
64	64	10,000/50,000	384/384	100,000	redis.single.xu1.large.64

Master/Standby

**Table 2** Specifications of master/standby DCS Redis 6.0/7.0 instances
Total Memory (GB)	Available Memory (GB)	Max. Connections (Default/Limit) (Count)	Assured/Maximum Bandwidth (Mbit/s)	Reference Performance (QPS)	Specification Code (spec_code in the API)
0.125	0.125	10,000/10,000	40/40	80,000	redis.ha.xu1.tiny.r2.128
0.25	0.25	10,000/10,000	80/80	80,000	redis.ha.xu1.tiny.r2.256
0.5	0.5	10,000/10,000	80/80	80,000	redis.ha.xu1.tiny.r2.512
1	1	10,000/50,000	80/80	80,000	redis.ha.xu1.large.r2.1
2	2	10,000/50,000	128/128	80,000	redis.ha.xu1.large.r2.2
4	4	10,000/50,000	192/192	80,000	redis.ha.xu1.large.r2.4
8	8	10,000/50,000	192/192	100,000	redis.ha.xu1.large.r2.8
16	16	10,000/50,000	256/256	100,000	redis.ha.xu1.large.r2.16
24	24	10,000/50,000	256/256	100,000	redis.ha.xu1.large.r2.24
32	32	10,000/50,000	256/256	100,000	redis.ha.xu1.large.r2.32
48	48	10,000/50,000	256/256	100,000	redis.ha.xu1.large.r2.48
64	64	10,000/50,000	384/384	100,000	redis.ha.xu1.large.r2.64

Redis Cluster

Specification code: Table 3 only list the specification codes of instances with 2 replicas (default). The specification names reflect the number of replicas, for example, redis.cluster.xu1.large.r2.4 (2 replicas | 4 GB) and redis.cluster.xu1.large.r1.4 (1 replica | 4 GB).
Number of used IP addresses: Number of shards × Number of replicas. For example:
8 GB | Redis Cluster | 2 replicas | 3 shards: Number of occupied IP addresses = 3 × 2 = 6
Available memory per node: Instance available memory/Master node quantity. For example:
A 64 GB instance has 64 GB available memory and 8 master nodes. The available memory per node is 64/8 = 8 GB.
Max. connections per node: Number of instance max. connections/Master node quantity. For example:
A 24 GB instance has 3 master nodes and the maximum connections limit is 150,000. The maximum connections limit per node = 150,000/3 = 50,000.

The maximum bandwidth and assured bandwidth as shown in the table below is for the entire instance, and not for a single shard. The relationship between the instance bandwidth and the bandwidth of a single shard is as follows:

Instance bandwidth = Bandwidth of a single shard × Number of shards
For a cluster instance, if the memory per shard is 1 GB, the bandwidth per shard is 384 Mbit/s. If the memory per shard is greater than 1 GB, the bandwidth per shard is 768 Mbit/s.
For example, if a 24 GB Redis Cluster instance has three shards and the memory per shard is 24/3 = 8 GB (greater than 1 GB), the bandwidth per shard is 768 Mbit/s.

**Table 3** Specifications of Redis Cluster DCS Redis 6.0/7.0 instances
Total Memory (GB)	Available Memory (GB)	Shards (Master Nodes)	Max. Connections (Default/Limit) (Count)	Assured/Maximum Bandwidth (Mbit/s)	Reference Performance (QPS)	Specification Code (spec_code in the API)
4	4	3	30,000/150,000	2,304/2,304	240,000	redis.cluster.xu1.large.r2.4
8	8	3	30,000/150,000	2,304/2,304	240,000	redis.cluster.xu1.large.r2.8
16	16	3	30,000/150,000	2,304/2,304	240,000	redis.cluster.xu1.large.r2.16
24	24	3	30,000/150,000	2,304/2,304	300,000	redis.cluster.xu1.large.r2.24
32	32	3	30,000/150,000	2,304/2,304	300,000	redis.cluster.xu1.large.r2.32
48	48	6	60,000/300,000	4,608/4,608	> 300,000	redis.cluster.xu1.large.r2.48
64	64	8	80,000/400,000	6,144/6,144	500,000	redis.cluster.xu1.large.r2.64
96	96	12	120,000/600,000	9,216/9,216	> 500,000	redis.cluster.xu1.large.r2.96
128	128	16	160,000/800,000	12,288/12,288	1,000,000	redis.cluster.xu1.large.r2.128
192	192	24	240,000/1,200,000	18,432/18,432	> 1,000,000	redis.cluster.xu1.large.r2.192
256	256	32	320,000/1,600,000	24,576/24,576	> 2,000,000	redis.cluster.xu1.large.r2.256
384	384	48	480,000/2,400,000	36,864/36,864	> 2,000,000	redis.cluster.xu1.large.r2.384
512	512	64	640,000/3,200,000	49,152/49,152	> 2,000,000	redis.cluster.xu1.large.r2.512
768	768	96	960,000/4,800,000	73,728/73,728	> 2,000,000	redis.cluster.xu1.large.r2.768
1,024	1,024	128	1,280,000/6,400,000	98,304/98,304	> 2,000,000	redis.cluster.xu1.large.r2.1024
2048	2048	128	2,560,000/12,800,000	98,304/98,304	> 2,000,000	redis.cluster.xu1.large.r2.2048