GRS configuration
GRS Star configuration was introduced in OS/390 V1R2 and is an excellent alternative to GRS Ring configuration.
In a GRS Ring configuration, the sharing systems communicate with each other via channel-to-channel connections or use XCF. The primary means for passing information is the ring system authority message (RSA-message). The RSA-message contains the information each system needs to protect the integrity of resources. The RSA-message passes from one system in the ring to another. No system can grant a request for a global resource until the other systems in the ring know about the request. With this architecture, ENQ delay time will increase every time a new system is added.
The introduction of GRS Star Topology provides ...
Get VSAM Demystified now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
