Data and storage

MariaDB, in the database named in the config (shared with Battlecore). Showdown owns:

Tables	Holds
match_history, player_elo, players	Ranked results, ratings, names
ranked_reward_players, ranked_reward_pairs, ranked_reward_matches, ranked_reward_jobs	Reward counters, pair heat, audit log, payouts waiting for the player
tournaments, tournament_participants, tournament_matches, tournament_reward_jobs	Tournaments, brackets and prize payouts
automated_tournaments	Automated tournament templates
draft_pools, draft_pool_entries	Draft pools and their Pokemon
draft_transfer_sessions, draft_transfer_participants, draft_transfer_rosters, draft_factory_transfers	Draft teams waiting to be played on the events server

rulesets, seasons and arenas belong to Battlecore. Do not edit transfer or reward-job rows by hand. The Draft Factory matchups are built into the jar.