Redis 4.0 and 5.0 Instance Specifications

This section describes DCS Redis 4.0 and 5.0 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. After an instance is created, you can change the maximum number of connections of the instance by modifying the maxclients parameter on the Instance Configuration > Parameters page on the console. This parameter cannot be modified for Proxy Cluster instances.
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.

Single-node, master/standby, and Redis Cluster types are available.
Only the x86 architecture is supported. The Arm architecture is not supported.

Single-Node Instances

**Table 1** Specifications of single-node DCS Redis 4.0 or 5.0 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 Instances

By default, a master/standby instance has two replicas (including the master). There is one master node.

Number of IP addresses occupied by a master/standby instance = Number of master nodes x Number of replicas. For example:

2 replicas: Number of occupied IP addresses = 1 x 2 = 2

3 replicas: Number of occupied IP addresses = 1 x 3 = 3

The following table lists the specification codes (spec_code) when there are two default replicas. Change the replica quantity in the specification codes based on the actual number of replicas. For example, if an 8 GB master/standby x86-based instance has two replicas, its specification code is redis.ha.xu1.large. r2.8. If it has three replicas, its specification code is redis.ha.xu1.large. r3.8.

**Table 2** Specifications of master/standby DCS Redis 4.0 or 5.0 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 Instances

In addition to larger memory, Redis Cluster instances feature more connections allowed, higher bandwidth allowed, and more QPS than single-node and master/standby instances.

Specification name: The following table only lists the specification names of 2-replica x86-based instances. The specification names reflect the number of replicas, for example, redis.cluster.xu1.large.r2.8 (x86 | 2 replicas | 8 GB) and redis.cluster.xu1.large.r3.8 (x86 | 3 replicas | 8 GB).
IP addresses: Number of occupied IP addresses = Number of shards x Number of replicas. For example:
4 GB | Redis Cluster | 3 replicas: Number of occupied IP addresses = 3 x 3 = 9
Available memory per node = Instance available memory/Master node quantity. 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 per node = Instance maximum connections/Master node quantity. For example:
A 4 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.

**Table 3** Specifications of Redis Cluster DCS Redis 4.0 or 5.0 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	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