Kaia has released version 2.1.0, introducing support for MEV Auction (KIP-249) and a series of optimizations aimed at enhancing API and storage performance. This update, which does not require a hard fork, enables the reception of BidTxs and allows external auctioneers to communicate winners via a websocket connection. Users are advised to enable websockets and restrict access using a firewall or allowlist. The update also includes default snappy compression for LevelDB, allowing full nodes to reclaim disk space through chain database compression, albeit with increased I/O load. For archive nodes, an experimental FlatTrie feature has been added, requiring resynchronization and temporarily disabling some features. Additionally, v2.1.0 introduces RocksDB support, new RPC block parameters, and various performance and stability enhancements.