Redis 6.0 Instance Specifications

This section describes DCS Redis 6.0 instance specifications, including the total memory, available memory, maximum number of connections allowed, 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. 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. For details about QPS testing, see the Performance White Paper.

DCS for Redis 6.0 comes in basic, professional (performance), and professional (storage) editions. They are currently available only in some regions, including CN North-Beijing4 and CN South-Guangzhou. For details about the architecture of DCS Redis 6.0 instances, see DCS Instance Types.

DCS Redis 6.0 basic instances are available in single-node, master/standby, and Redis Cluster types.DCS Redis 6.0 professional instances are available only in the master/standby type. All of them are based on the x86 CPU.

The specifications available on the console vary by region.

Basic Edition, Master/Standby

**Table 1** Specifications of master/standby DCS Redis 6.0 basic edition 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

Basic Edition, Single-Node

**Table 2** Specifications of single-node DCS Redis 6.0 basic edition 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

Basic Edition, Redis Cluster

Specification code: Table 3 only lists 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).
IP addresses: Number of occupied IP addresses = Number of shards x Number of replicas. For example:
24 GB | Redis Cluster | 2 replicas: Number of occupied IP addresses = 3 x 2 = 6
Available memory per node = Instance available memory/Master node quantity. For example:
For example, a 24 GB instance has 24 GB available memory and 3 master nodes. The available memory per node is 24/3 = 8 GB.
Maximum connections limit per node = Maximum connections limit/Master node quantity. For example:
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 following table lists only the Redis Cluster instance specifications with default shards. If you customize shards, see the maximum number of connections, assured/maximum bandwidth, and product specification code (flavor) in the Instance Specification table the Buy DCS Instance page of the DCS console.
The maximum connections of a cluster is for the entire instance, and not for a single shard. Maximum connections of a single shard = Maximum connections of an instance/Number of shards.
The maximum bandwidth and assured bandwidth of a cluster 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 x Number of shards
- For a cluster instance, if the memory of a single shard is 1 GB, the bandwidth of a single shard is 384 Mbit/s. If the memory of a single shard is greater than 1 GB, the bandwidth of a single shard is 768 Mbit/s.

**Table 3** Specifications of Redis Cluster DCS Redis 6.0 basic edition 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	2304/2304	240,000	redis.cluster.xu1.large.r2.4
8	8	3	30,000/150,000	2304/2304	240,000	redis.cluster.xu1.large.r2.8
16	16	3	30,000/150,000	2304/2304	240,000	redis.cluster.xu1.large.r2.16
24	24	3	30,000/150,000	2304/2304	300,000	redis.cluster.xu1.large.r2.24
32	32	3	30,000/150,000	2304/2304	300,000	redis.cluster.xu1.large.r2.32
48	48	6	60,000/300,000	4608/4608	> 300,000	redis.cluster.xu1.large.r2.48
64	64	8	80,000/400,000	6144/6144	500,000	redis.cluster.xu1.large.r2.64
96	96	12	120,000/600,000	9216/9216	> 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
1024	1024	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

Professional (Performance) Edition

Currently, DCS for Redis 6.0 professional (performance) edition supports master/standby instances based on x86 CPUs.

**Table 4** Specifications of DCS Redis 6.0 professional (performance) edition 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)
8	8	10,000/50,000	1536/1536	400,000	redis.ha.xu1.large.enthp.8
16	16	10,000/50,000	1536/1536	400,000	redis.ha.xu1.large.enthp.16
32	32	10,000/50,000	1536/1536	400,000	redis.ha.xu1.large.enthp.32
64	64	10,000/50,000	1536/1536	400,000	redis.ha.xu1.large.enthp.64

Professional (Storage) Edition

Currently, DCS for Redis 6.0 professional (storage) edition supports master/standby instances based on x86 CPUs.

Professional (storage) instances use memory and SSDs. They use memory to cache hot data and SSDs to store all data. "Available Memory" in the following table is the disk capacity.

**Table 5** Specifications of DCS Redis 6.0 professional (storage) edition instances
Total Memory (GB)	Maximum Storage (GB)	Max. Connections (Default/Limit) (Count)	Assured/Maximum Bandwidth (Mbit/s)	Reference Performance (QPS)	Specification Code (spec_code in the API)
8	64	10,000/50,000	768/768	70,000	redis.ha.xu1.large.entst.8
16	128	10,000/50,000	768/768	70,000	redis.ha.xu1.large.entst.16
32	256	10,000/50,000	768/768	70,000	redis.ha.xu1.large.entst.32