connect_info:
  DB_W:
    attrs:
      AutoCommit: 0
      PrintError: 0
      RaiseError: 1
      Warn: 0
    dsn: dbi:mysql:dbname=user;host=db_w
    password: ~
    user: hoge
  DB_R1:
    attrs:
      AutoCommit: 0
      PrintError: 0
      RaiseError: 1
      Warn: 0
    dsn: dbi:mysql:dbname=user;host=db_r1
    password: ~
    user: hoge
  DB_R2:
    attrs:
      AutoCommit: 0
      PrintError: 0
      RaiseError: 1
      Warn: 0
    dsn: dbi:mysql:dbname=user;host=db_r2
    password: ~
    user: hoge
clusters:
  DB_R:
    - DB_R1
    - DB_R2