Constraint
Constraints are control statements that are supplied to GVBDBFON. The constraint controls place limits on the buffering performed by CA Hyper-Buf. This allows each installation to establish boundaries for the buffering variables which are honored by the CA Hyper-Buf buffer space calculation routine.
Level Selector
A level selector is a control statement in the GVBDBFON control stream. Each level selector determines the scope of the constraints which follow the selector. The valid level selectors are SMSCLASS, CLUSTER, JOB, PROGRAM, and PROGRAM/DDNAME.
LSR (Local Shared Resources)
A buffering scheme used by VSAM that allows multiple files to 'share' buffers and control blocks. (See also 'NSR').
MODE control
A MODE control is a control statement in the GVBDBFON control stream. Each MODE control starts a new mode control group and determines if the new group is an INCLUDE group or an EXCLUDE group.
MODE control group
A MODE control group is a group of control statements in the GVBDBFON control stream. Each group is delimited by MODE control statements. Each MODE control starts a new mode control group and determines the type of processing specified by the controls in this group. This mode control group is terminated at the next MODE control statement, or the end of the control stream, whichever comes first.
NSR (Non Shared Resources)
A buffering scheme used by VSAM that allocates separate buffers and control blocks for the exclusive use of each file that is OPENed. See also LSR.
UBF (User Buffering)
An option available to assembler language programs only, which allows the application to maintain control of the buffering process. CA Hyper-Buf cannot alter the number of buffers that these applications create.
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