Branch2
Storage
RM
3.2 branch2 commit async
DB
Branch3
Business
2.2.1 branch2.register2.2.2 branch2 local transaction commit2.2.3 report branch2 status
2.3.1 branch3.register2.3.2 branch3 local transaction commit2.3.3 report branch3 status
RPC
3.1 branch1 commit async
TC
2.1.1 branch1.register2.1.2 branch1 local transaction commit2.1.3 report branch1 status
1.tx.begin2.tx.do.business3.tx.commit
Branch1
TM
3.3 branch3 commit async
