DIS Project – Blackjack  Membership and job distribution –R 陳冠宇  client, game process –R 凌宇  server, game UI –R 謝昇穎  DB communicate

Introduction  assign servers (primary and backup)  login system  group membership (create or join)  start poker game –leader election to decide a coordinator –a round game –one by one  logout system  exit

Fault tolerant  About architecture –DB  use primary and backup –Server  primary and backup for one node or group –scalable  the server can be assigned  About game process –allows pure player crash or disconnect, game continue –if coordinator crash, the game over

Key issue  Group consistency –card view –player state  Error detection –disconnect detect –how often  Our solution –Java RMI : event driven –Multithread