In TPX is there a limit to the number of masking rules entries in a virtual masking rules table?

Products

• TPX - Session Management
• Vman Session Management for z/OS

Issue/Introduction

In TPX is there a limit to the number of masking rules entries in a virtual masking rules table?

Getting the error message MENG0004 VSAM access error. RTNCD=8, REASON=108 when trying to add more than 500 virtual terminal masking rules entries. 

Environment

Release : 5.4

Component : CA-TPX for OS/390

Resolution

The Masking Rule table entry limitation is based on the record size for the ADMIN1 file. For example,
For 700 entries in the Terminal Masking Rule Table, a max record size of approximately 14,000 is needed.
That would mean a 175% increase in max record size for TPX ADMIN1 VSAM database compared to the Default.

If the record size is increased the TPXADMIN Internal application subprogram for
Masking Table (ADMMASK ASMPGM) and its ability to handle, creating and maintaining
a masking rule record is much large than normal.
This could result in VSAM CI/CA splits for that one record, on the VSAM ADMIN1 file.

To implement increased record size.
 - backup the TPX VSAM ADMIN1 database.
 - Allocate a new VSAM ADMIN1 database with larger record size.
 - Restore the backup to the newly created VSAM ADMIN1(with the increased record size).
 - REORG the new VSAM ADMIN1 database
 - More frequent REORGs for VSAM ADMIN1 is recommended to maintain performance.

Every time adding a new masking rules table entry or deleting an existing entry, a REORG of the VSMA ADMIN1 is highly recommended.