Does Datacom use Storage Protection Key 0?

Products

• Datacom
• DATACOM - AD
• CIS
• COMMON SERVICES FOR Z/OS
• 90S SERVICES
• DATABASE MANAGEMENT SOLUTIONS FOR DB2 FOR Z/OS
• COMMON PRODUCT SERVICES COMPONENT
• Common Services
• CA ECOMETER SERVER COMPONENT FOC
• Easytrieve Report Generator for Common Services
• INFOCAI MAINTENANCE
• IPC
• UNICENTER JCLCHECK COMMON COMPONENT
• Mainframe VM Product Manager
• CHORUS SOFTWARE MANAGER
• CA ON DEMAND PORTAL
• CA Service Desk Manager - Unified Self Service
• PAM CLIENT FOR LINUX ON MAINFRAME
• MAINFRAME CONNECTOR FOR LINUX ON MAINFRAME
• GRAPHICAL MANAGEMENT INTERFACE
• WEB ADMINISTRATOR FOR TOP SECRET
• Xpertware

Issue/Introduction

z/OS uses 16 different Keys to allow/deny access to each 4Kb block of central storage.

Does CA Datacom use Storage Protection Key 0?

Environment

CA Datacom/DB on z/OS

Resolution

CA Datacom mostly runs in Key 8 but briefly gets into Key 0 when needed and gets back into Key 8 promptly. One of the instances would be when using XCF. Also during COVERED VIRTUAL processing to name a few. 

Additional Information

IBM Storage Protection Keys:
https://www.ibm.com/support/knowledgecenter/en/SSLTBW_2.3.0/com.ibm.zos.v2r3.ieav200/iea3v2_Storage_protection.htm