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easily. The system manager can change the key range with a
command, for example, in an overnight operation, or you can
plan to do this during scheduled maintenance.
A partition can also have multiple standby servers.
Standby Server
Configurations
A node can be configured as a primary server for one key range
and as a standby server for another key range. This helps
to distribute the work of the standby servers. Figure 1–19
illustrates this use of standbys with distributed partitioning.
As shown in Figure 1–19, the Server application on backend A
is the primary server for accounts 1 to 19,999 and the Server
application on backend B is the standby for these same accounts,
shown as a dashed line. The Server application on backend B
is the primary for accounts 20,000 to 39,999 and the Server
application on backend A can be the standby for these same
accounts (not shown in the figure). For clarity, account numbers
are shown only for the primary servers and one standby server.
Figure 1–19 Standby with Partitioning
VM-0838A-AI
Accounts:
1-19,999
Accounts:
20,000-39,999
BE
Server
application
BE
Server
application
A
B
1-19,999
1-19,999
20,000-39,999
1-19,999
1-19,999
20,000-39,999
TR
Anonymous clients
RTR supports anonymous clients; that is, clients can be set up in
a configuration using wildcarded node names.
Tunnel
RTR can also be used with firewall tunneling software, which
supports secure internet communication for an RTR connection,
either client-to-router, or router-to-backend.
Introduction 1–25