
Introduction Offload System
13-16 User Reference
The offload system consists of four programs:
Program Function
TSIDOFD Selects datasets for offload and backup by creating control statements for
TSIDOFL.
TSIDOFL Offloads and backs up selected datasets.
TSIDONL Restores offload and backup datasets back to disk and creates a listing of
datasets on the offload tape.
TSIDOFC Consolidates offload tapes and copies offload and backup tapes.
The BIM-EPIC offload system uses proprietary disk and tape I/O routines that provide
extraordinary high performance through the use of physical I/O, maximum block sizes, and a
single tape file. The offload system is implemented automatically as soon as BIM-EPIC is
activated and is fully upward compatible with the prior offload system (all JCL, control
statements, program names, and procedures remain unchanged). This onload program
automatically recognizes and processes offload and backup tapes created under the prior
(BIM-EPIC 4.14 and prior) offload system so complete access to existing offload and backup
datasets is assured.
Whenever an offloaded dataset is read, this high performance feature requires sufficient disk
space to temporarily copy the data to the disk pool specified in the EDD. If an “insufficient
space” condition occurs while creating this temporary disk file, BIM-EPIC allocation
configuration options (e.g., FRAG and alternate pools) will be used.
Programs
High Performance
I/O
IMPORTANT
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