Скачать или смотреть What is the difference between Partitioning and Sharding db tables?

Partitioning is a generic term used for dividing a large database table into multiple smaller parts. Sharding is a specific type of partitioning in which data is partitioned horizontally and divided on the basis of a shared key also known as Shard key.

In sharding, schema is replicated across multiple servers. Data is stored on multiple nodes on the basis of a Shard key. Most popular sharding key techniques are by alphabets or digits. Eg. Data from 0-4 in one shard and 5-9 in another shard. Or data from a-m in one shard and n-z in another shard.

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