greenplum激活standby和恢复master原有角色

定义：server1=(master) server2=(standby) Active standby server when master down. gpactivatestandby -d /data/master/gpseg-1 -f (on server2) Change server1 as standby . gpinitstandby -s server1 (on server2) gpactivatestandby -d /data/master/g

Active standby server when master down.
gpactivatestandby -d /data/master/gpseg-1 -f (on server2)
1. Change server1 as standby .
   gpinitstandby -s server1 (on server2)
   gpactivatestandby -d /data/master/gpseg-1 -f (on server1)
2. restore server1 as master
   gpstop -m (on server2)
   gpactivatestandby -d /data/master/gpseg-1 -f (on server1)
3. restore server2 as standby
   gpinitstandby -s server2 (on server1)
   
   
   MARK: pay attention to store or remove /data/master/gpseg-1 when do gpactivatestandby operation.