92 Data Sharing in a Nutshell
CICS
tm
and CICSPlex® Systems Manager, IMS
tm
Transaction Manager, using
IMS Connect routing or shared message queues, WebSphere Application
Server, and WebSphere MQSeries®, all participate in what we call the
transaction manager layer. Each of these has facilities to route work to available
resources. Some of these facilities are independent of network interaction; other
facilities rely on network interaction to route work.
For example, MQSeries receives messages after network routing, but it can
place those messages on shared queues. Doing this allows applications to pull
from these queues from any image in the Parallel Sysplex. Although DB2’s
distributed data facility (DDF) can also be considered to be in this ...