https://kevinwang930.github.io/categories/tidb/Recent content in Tidb on Kevin wang's blogHugoen-USThu, 06 Aug 2026 22:00:00 +0200https://kevinwang930.github.io/post/data/db/tidb/architecture/Thu, 06 Aug 2026 22:00:00 +0200https://kevinwang930.github.io/post/data/db/tidb/architecture/<p>TiDB is an open-source, MySQL-compatible distributed SQL database: the <strong>TiDB</strong> process handles SQL and transactions, <strong>PD</strong> places data and issues timestamps, and <strong>TiKV</strong> stores rows with Multi-Raft, MVCC, and RocksDB. This post covers architecture (planes and division of labor, Regions, TiKV store) then implementation of codecs, client-go, and <code>primaryKey</code> 2PC—illustrated with a small <code>orders</code> table. Grounded in <code>git/tidb</code> and <code>github.com/tikv/client-go/v2</code> (TiKV server raftstore/RocksDB at architecture level; in-tree <strong>unistore</strong> for MVCC behavior where the <code>tikv/tikv</code> tree is absent).</p>