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Why is the redis slot 16384?

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Apr 07, 2024 am 11:21 AM

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The number of Redis slots is 16384 for the following reasons: distribute data evenly to avoid data skew. To ensure high data availability, even if a node goes down, its slots will be transferred to other nodes. Easy to scale, dynamically add or remove nodes and reallocate slots based on data volume. Compatible with older Redis versions ensuring backward compatibility. Fast search, high memory efficiency, data key space consistency.

Why is the redis slot 16384?

The reason why the number of Redis slots is 16384

Redis stores data in slots called slots In the internal data structure, each slot contains a part of the key space. In order to ensure uniform distribution and high availability of data, Redis uses a sharding mechanism to allocate slots to different Redis nodes.

The selection of the number of slots takes into account the following factors:

Uniformity: 16384 slots can evenly distribute data to different nodes to avoid data skew.
Availability: If a node goes down, its slots will be automatically transferred to other nodes to ensure high availability of data.
Scalability: As the amount of data grows, nodes can be dynamically added or removed and slots reallocated to meet changing needs.
Compatibility: 16384 slot count is compatible with earlier Redis versions, ensuring backward compatibility.

Other Benefits:

In addition to the above reasons, 16384 slots also provide the following benefits:

Quick search: Each slot is a unique integer, which can quickly locate which node the key belongs to.
Memory efficiency: Slot information is stored in the memory of Redis and takes up little space.
Consistency: The slot allocation algorithm ensures that the key space of the data is consistent between nodes.

Therefore, the number of Redis slots is 16384, which is the best choice based on comprehensive considerations such as uniformity, availability, scalability, compatibility, and memory efficiency.

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