CXX report and SYSVIEW device type discrepancy for Datacom VIRTUAL areas.

Products

• Datacom/DB
• SYSVIEW Performance Management

Issue/Introduction

This article addresses discrepancies where the CXX report reflects a 3390 VSAM LDS while a SYSVIEW display shows the device as 3380 or marked as *VIRTUAL*.

Environment

Z/OS

SYSVIEW 17.0 

Datacom 15.1 

Resolution

The discrepancy occurs when areas are defined as *VIRTUAL* in the MUF startup cards. SYSVIEW may default to reflecting a 3380 device type for these virtual areas, even if the CXX report has been updated to reflect 3390 VSAM LDS.

Additional Information

SYSVIEW gets the information from SYSADM.DIR_DATASET .

For VIRTUAL areas , the DEVICE type is shown as 3380 as explained in the Note for DEVICE  here in DIR_DATASET (DRZ).

When a Datacom area has been coded as being VIRTUAL in the Datacom Multi-User startup cards then the data  set name found in the CXX is not used. 

You can wipe out that data set name from the CXX by running DBUTLTY  CXXMAINT OPTION=ALTER,DBID=XXXXX,AREA=XXX,DSN=* 

See the documentation : CXXMAINT ALTER DSN (Modify Data Set Name).