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Access Method
Access Method shows the access method used to process the data set:
| Method |
Description |
| BATCHPIPE |
files processed by the BatchPipes subsystem |
| BDAM |
basic direct access method |
| BDAM FP |
basic direct access method fast path |
| BPAM |
basic partitioned access method |
| BSAM |
basic sequential access method |
| EXCP |
direct invocation of execute channel program |
| HFS |
Hierarchical File System |
| IAM |
accessing an IAM file |
| IAMLOAD |
loading an IAM file |
| ISAM |
indexed sequential access method |
| MEDIA MGR |
Media Manager |
| MM/EXTSEQ |
Media Manager on behalf of extended sequential format data sets |
| MM/PDSE |
Media Manager on behalf of partitioned data set extended |
| OSAM |
overflow sequential access method |
| Other |
non-standard access method |
| QSAM |
queued sequential access method |
| TCAM LINE |
telecommunications access method line group |
| TCAM MSG |
telecommunications access method message queue |
| VIO |
virtual input/output |
| VSAM |
virtual storage access method |
| ZFS |
zSeries File System |
IAM refers to Innovation Access Method, a product of Innovation Data Processing, Inc.
For VSAM this field may contain:
| Abbreviation |
Meaning |
| VSAM AIXD |
data portion of an alternate index |
| VSAM AIXX |
index portion of an alternate index |
| VSAM ESDS |
entry sequenced data set |
| VSAM KSDS |
key sequenced data set |
| VSAM INDX |
index of a key sequenced data set |
| VSAM LDS |
linear data set |
| VSAM RRDS |
relative record data set |
| VSAM UPGD |
data portion of an alternate index in the upgrade mode |
| VSAM UPGX |
index of an alternate index in the upgrade mode |
| VSAM VRRD |
variable length relative record data set |
The VSAM values may be followed by:
| FP |
fast path |
| GSR |
global shared resource |
| LSR |
local shared resource |
If a file is processed without shared resources and as an LSR, the report will identify it as an LSR.
More about the Data Set Characteristics report