Tag

sharding

2 cards

Cards

A 2TB table moving onto four shards with no downtime through dual write, backfill, verify, gradual read shift and finish, set against the naive stop-and-copy plan

DatabasesDay 46Sep 17, 2026

Splitting a Table While People Are Using It

system-design databases sharding

Partitioning by range against partitioning by hash, and the real question underneath both — what a single query has to touch, and whether the key keeps related rows on one shard

Distributed DataDay 33Sep 2, 2026

The Decision You Can't Undo

system-design distributed-data partitioning