Il database open source più famoso al mondo. MongoDB. Project Voldemort vs. MongoDB. Shard (database architecture) Some data within a database remains present in all shards,[notes 1] but some only appears in a single shard.
Each shard (or server) acts as the single source for this subset of data.[1] A heavier reliance on the interconnect between servers[citation needed]Increased latency when querying, especially where more than one shard must be searched. [citation needed]Data or indexes are often only sharded one way, so that some searches are optimal, and others are slow or impossible. Project Voldemort.