March 2003
Intermediate to advanced
282 pages
9h 13m
English
book
IMS in the Parallel Sysplex Volume I: Reviewing the IMSplex Technology
by Jouko Jantti, Juan Jesœs Iniesta Mart’nez, Knut Kubein, Bill Stillwell, Gary Wicks
Content preview from IMS in the Parallel Sysplex Volume I: Reviewing the IMSplex Technology
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10 IMS in the Parallel Sysplex, Volume I: Reviewing the IMSplex Technology
– A persistent structure is one which, when all connectors have disconnected from the
structure, the structure remains allocated in the Coupling Facility. It is still there the next
time a program connects to it. Examples of persistent IMS structures are the shared
queue structures, the IRLM lock structure, and the resource structure. OSAM, VSAM,
and shared VSO structures are not persistent.
Connection information, such as connection persistence
– A
persistent connection is one which persists if the connector fails. A non-persistent
structure will not be deleted if there are any active or failed persistent connections to
that structure. An IMS example is a shared VSO ...
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