Comparing Professional and Basic Editions

Huawei Cloud DCS professional edition is completely developed by Huawei Cloud, and compatible with open-source Redis software. This edition uses the multi-thread master-N*worker model instead of the conventional master-worker model. Each worker thread can listen on ports to monitor requests for establishing network connections, accept the requests and establish network connections, read and write data (in network connections, for example, sockets), and parse and process Redis commands. As a result, performance is improved by N times.

**Table 1** Comparing professional and basic editions
Item	Basic Edition	Professional Editions
Open-source compatibility	Open-source Redis 4.0/5.0/6.0, single-threaded	Compatible with open-source Redis 6.0, multi-threaded
Performance	100,000 QPS per shard, up to 1 ms latency	Professional (performance): 400,000 QPS per shard Professional (storage): 70,000 QPS per shard Up to 1 ms latency
Instance specifications	Instance types: single-node, master/standby, cluster, and read/write splitting Single-node and master/standby: 128 MB to 64 GB Read/write splitting: 8–32 GB Cluster: up to 2048 GB	Currently, only the master/standby instance type is available. There are two editions: Professional (performance): 8–64 GB Professional (storage): 8–32 GB memory, and up to 256 GB with SSD storage For details about the differences between professional (performance) and professional (storage) editions, see Table 2.
Data security	Fine-grained authorization and IP address whitelists Data persistence and backup (except for the single-node type) Cross-AZ DR Automatic failover Capacity expansion and instance type change with a few clicks	Fine-grained authorization and security groups Persistence and backup Cross-AZ DR Automatic failover Capacity expansion with a few clicks

**Table 2** Differences between professional (performance) and professional (storage) editions
Item	Professional (Performance) Edition	Professional (Storage) Edition
QPS	400,000 QPS per shard, higher than the storage edition	70,000 QPS per shard
Storage	SSD storage is not supported. Data is stored entirely in memory. Data is persisted using AOF files.	Memory + SSD Memory caches hot data and SSDs store all data.
Backup file format	AOF and RDB	RDB