Shard (database architecture)

A database shard is a horizontal partition of data in a database or search engine. Each individual partition is referred to as a shard or database shard. Each shard is held on a separate database server instance, to spread load.

Some data within a database remains present in all shards, but some only appears in a single shard. Each shard (or server) acts as the single source for this subset of data.

单词	Database sharding
释义	Database sharding 英语百科 Shard (database architecture) A database shard is a horizontal partition of data in a database or search engine. Each individual partition is referred to as a shard or database shard. Each shard is held on a separate database server instance, to spread load. Some data within a database remains present in all shards, but some only appears in a single shard. Each shard (or server) acts as the single source for this subset of data.
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Database sharding

Shard (database architecture)