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RTR Server Types
Figure 1–18 Bank Partitioning Example
VM-0837A-AI
TR
BE
Server
application
BE
Server
application
BE
Server
application
BE
Server
application
BE
Server
application
Accounts
1-19,999
Accounts
20,000-
39,999
Accounts
40,000-
69,999
Accounts
70,000-
89,999
Accounts
90,000-
99,999
You can assign a partition name in your application program
or have it set by the system manager. Note that sometimes the
terms key range and partition are used as synonyms in code
examples and samples with RTR, but strictly speaking, the
key range defines the partition. A partition has both a name,
its partition name, and an identifier generated by RTR — the
partition ID. The properties of a partition (callout, standby,
shadow, concurrent, key segment range) can be defined by
the system manager with a CREATE PARTITION command.
For details of the command syntax, refer to the HP Reliable
Transaction Router System Manager’s Manual.
A significant advantage of the partitioning shown in the bank
example is that you can add more account numbers without
making changes to your application; you need only add another
server and disk drive for the new account numbers. For example,
say you need to add account numbers from 90,000 to 99,999 to
the basic configuration of Figure 1–18, Bank Partitioning
Example. You can add these accounts and bring them on line
1–24 Introduction