Help Center/ Distributed Cache Service/ Drawer/ Buying a DCS Instance/ Sharding
Updated on 2025-07-24 GMT+08:00
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Sharding

Parameter Explanation

If the instance type is Proxy Cluster or Redis Cluster, there are two ways to configure the instance shards:

  • Use default

    Select a flavor from the Instance Specifications table. For example, a 4 GB Proxy Cluster instance has three shards, and each shard has a size of 4 GB/3.

  • Customize

    Customize the capacity of each shard. For example, if you set the shard size to 2 GB, the Instance Specification table displays flavors in which each shard is 2 GB.

FAQs

What Is a Shard?

A shard is a management unit in Redis clusters. Each shard corresponds to a redis-server process. A cluster consists of multiple shards. Each shard has multiple slots. Data is distributedly stored in the slots. Shards increase cache capacity and concurrent connections.

Each cluster instance consists of multiple shards. By default, each shard is a master/standby instance with two replicas. The number of shards is equal to the number of master nodes in a cluster instance.

Parent Topic: Buying a DCS Instance