12c Real-Time cascade Standby Transport mode
edited Apr 15, 2015 10:03AM in High Availability Data Guard, Sharding and Global Data Services (MOSC) 2 commentsAnswered
Hello Friends,
I've tested Real-Time cascade standby database several times and even with Broker.
I have reviewed oracle documentation http://docs.oracle.com/database/121/SBYDB/log_transport.htm#SBYDB5122
and also MOS document Cascaded Standby Databases in Oracle 12c Doc ID 1542969.1
In order to have Real-Time cascade standby database the transport mode from cascading to cascade should be ASYNC, if we use SYNC then it falls under Non Real-Time apply... But there is no clear explanation why SYNC won't work with Real-Time Cascade standby?
Of course i have tested what happens if we use SYNC mode and Real-Time apply was not working... If someone explains why ASYNC supports and why not SYNC? Or The architecture designed like that?
0