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 57
Resource
The resource locked identifies the database data set. This resource has the global DMB
number to identify the database and the DCB number to identify the data set in the
database. There is also an identification that this is an extend lock.
Private attribute
The attribute
private
is always used with extend locks.
Known attribute
The attribute
known
is always used with extend locks.
Level
Level 2 is always used for extend locks.
3.5.5 Data set reference locks
Data set reference locks are not used for serialization. Instead, they are used in conjunction
with notifications. The data set reference lock is used for notification of data set extensions
and buffer invalidations.
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