sqlserver 读写分离

--由于这里有2个instance（包括了primary角色的）, 因此在primary上分别为这2个instance建立关系

ALTER AVAILABILITY GROUP AG01

MODIFY REPLICA ON

N'WIN-116' WITH

(SECONDARY_ROLE (READ_ONLY_ROUTING_URL = N'tcp://WIN-116.xtion.com:1433'))

ALTER AVAILABILITY GROUP AG01

MODIFY REPLICA ON

N'WIN-117' WITH

(SECONDARY_ROLE (READ_ONLY_ROUTING_URL = N'tcp://WIN-117.xtion.com:1433'))

ALTER AVAILABILITY GROUP AG01

MODIFY REPLICA ON

N'WIN-115' WITH

(SECONDARY_ROLE (READ_ONLY_ROUTING_URL = N'tcp://WIN-115.xtion.com:1433'))

--为每个可能成为primary角色的server，建立相应的只读列表，下面的代码由于互为readonly server

ALTER AVAILABILITY GROUP AG01

MODIFY REPLICA ON

N'WIN-117' WITH

(PRIMARY_ROLE (READ_ONLY_ROUTING_LIST=('WIN-116')));

ALTER AVAILABILITY GROUP AG01

MODIFY REPLICA ON

N'WIN-116' WITH

(PRIMARY_ROLE (READ_ONLY_ROUTING_LIST=('WIN-117')));

ALTER AVAILABILITY GROUP AG01

MODIFY REPLICA ON

N'WIN-115' WITH

(PRIMARY_ROLE (READ_ONLY_ROUTING_LIST=('WIN-116','WIN-117')));

--上述语句中的列表是有优先级关系的，排在前面的具有更高的优先级