Comparing Versions

When creating a DCS Redis instance, you can select the cache engine version and the instance type.

DCS for Redis 3.0 is no longer provided. You can use DCS for Redis 4.0, 5.0, or 6.0 instead.

• Version

  DCS supports Redis 6.0, 5.0, 4.0, and 3.0. Table 1 describes the differences between these versions. For details about the new features of Redis 4.0 and 5.0, see New Features of DCS for Redis 4.0 and New Features of DCS for Redis 5.0 .

  Table 1 Differences between Redis versions

  Feature	Redis 3.0	Redis 4.0 & Redis 5.0	Redis 6.0
  Open-source compatibility	Redis 3.0.7	Redis 4.0.14 and 5.0.14, respectively NOTE: DCS Redis 5.0 instances created before February 2022 are compatible with open-source Redis 5.0.9. For details about how to query the open-source version, see How Do I View the Version of a DCS Redis Instance? To use Redis 5.0.14, create another instance. Currently, the Redis version cannot be upgraded.	Basic edition: Redis 6.2.7 Professional edition: KeyDB 6.0.16
  Instance deployment mode	Based on VMs	Containerized based on physical servers	Containerized based on physical servers
  CPU architecture	x86	x86	x86
  Time required for creating an instance	3–15 minutes, or 10–30 minutes for cluster instances.	8 seconds	8 seconds
  QPS	100,000 QPS per node	100,000 QPS per node	Basic edition: 150,000 QPS per node Professional edition: 400,000 QPS per node
  Public network access	Supported	Not supported	Not supported
  Domain name connection	Supported in VPC	Supported in VPC	Supported in VPC
  Visualized data management	Not supported	Web CLI for Redis access and data management.	Web CLI for Redis access and data management.
  Instance type	Single-node, master/standby, and Proxy Cluster	Single-node, master/standby, Proxy Cluster, and Redis Cluster	Basic edition: single-node, master/standby, and Redis Cluster Professional edition: master/standby
  Instance total memory	Ranges from 2 GB to 1024 GB.	Regular specifications range from 2 GB to 1024 GB. Small specifications of 128 MB, 256 MB, 512 MB, and 1 GB are also available for single-node and master/standby instances.	4 GB, 8 GB, 16 GB, 32 GB, and 64 GB (128 MB, 256 MB, 512 MB, and 1 GB are additionally supported for single-node and master/standby instances)
  Capacity expansion/reduction	Online capacity expansion and reduction	Online capacity expansion and reduction	Online capacity expansion and reduction
  Backup and restoration	Supported for master/standby and Proxy Cluster instances	Supported for master/standby, Proxy Cluster, and Redis Cluster instances	Supported for master/standby instances

  

  The underlying architectures vary by Redis version. Once a Redis version is chosen, it cannot be changed. For example, you cannot upgrade a DCS Redis 3.0 instance to Redis 4.0 or 5.0. If you require a higher Redis version, buy a new instance that meets your requirements and then migrate data from the old instance to the new one.

• Instance type

  DCS provides single-node, master/standby, Proxy Cluster, and Redis Cluster instance types. For details about their architectures and application scenarios, see DCS Instance Types.