HP Reliable Transaction Router - Manual (Page 80)

The RTR System Management Environment
Figure 5–1 RTR System Management Environment
VM-0841A-AI
Management Station
Running Browser Software
FE
RTRACP
RTRD
RTR COMSERV
RTR CLI
TR
RTRACP
RTRD
RTR COMSERV
BE
RTRACP
RTRD
RTR COMSERV
RTR CLI
Transaction
Management
The RTR transaction is the heart of an RTR application,
and transaction state characterizes the current condition of a
transaction. As a transaction passes from one state to another, it
undergoes a state transition. Transaction states are maintained
in memory, and some states are stored in the RTR journal for
use in recovery.
RTR uses three transaction states to track transaction status:
• Transaction runtime state
• Transaction journal state
• Transaction server state
Transaction runtime state describes how a transaction progresses
from the point of view of RTR roles (FE, TR, BE). A transaction,
for example, can be in one state as seen from the frontend, and
in another as seen from the router.
5–4 The RTR Environment