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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Chapter 3. Data sharing integrity components 51
holder releases the lock. On the other hand, locks can be requested with a conditional
attribute. Conditional lock requests don't wait for release by holders; instead, the IRLM tells
the requestor that the lock is not available. The requestor cannot have the lock and must take
some other action. The use of the conditional attribute is explained in 3.4.1, “Lock properties”
on page 51.
With block level data sharing, the IRLM must be used. One IRLM can share locking
information with other IRLM instances by means of a notification process. Notifications are
messages sent from one IMS to other IMS systems in the data sharing group. These
messages contain information that other IMS systems need. For ...
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