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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50 IMS in the Parallel Sysplex, Volume I: Reviewing the IMSplex Technology
4. Read without integrity (RO)
The subsystem only reads the database and it does not check any lock or enqueue held
by other subsystems.
– PROCOPT of GO (batch)
– ACCESS of GO (online)
3.3 Database Recovery Control and the RECON
Database Recovery Control (DBRC) controls the authorization process for each IMS to
access and update shared data. Information is stored in the RECONs to reflect system
access to data and to store information needed for database recovery.
Designating the RECON as SHARECTL is a prerequisite to any data sharing and tells DBRC
to:
Enforce IMS integrity processing.
Provide DBRC authorization for registered databases.
Under SHARECTL, DBRC will contr
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