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Non-VSAM compression component

The following table shows non-CSA storage requirements.

Non-CSA storage in application address spaces

Total

Above 16-MB line

Control blocks per address space

512 bytes

All

Control blocks per OPEN DCB per data set

3 KB

All except 1536 bytes

Data areas per OPEN DCB per

Data set

.5 MB

All except 32 KB

QSAM LM 1 in MVS/DFP

.5 MB

All except 77 KB

QSAM LM 1 in DFSMS/MVS

.5 MB

All

QSAM MM 2 in MVS/DFP

.5 MB

All except 77 KB

QSAM MM 2 in DFSMS/MVS

.5 MB

All

BSAM in MVS/DFP

.5 MB

All except 98 KB

BSAM in DFSMS/MVS

.5 MB

All except 2 KB

1. LM—Locate Mode GET and PUT operations.

2. MM—Move Mode GET and PUT operations.

The following table shows CSA storage requirements.

Maximum common storage required

Total

Above 16-MB line

Modules per OS/390 system

277 KB

All except 57KB

Control blocks per OS/390 system

16 KB plus 8 bytes per address space

All

Control blocks per OS/390 address space with compression and expansion activity

2 KB

All


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