Termos e Definições - X

The IBM XCF component of z/OS manages communications between applications that may be on the same system or different systems in a Sysplex.

Systems communicate using messages transported by one of two mechanisms:

- Dedicated CTC links (or channels)
- Structures in a Coupling Facility (only available in a Parallel Sysplex.
In a Parallel Sysplex decisions about which of these two transport mechanisms to use for routing a specific message are made dynamically.

Within a single z/OS image messages are transported using cross-memory services, rather than being routed through either of the physical transport mechanisms.

Applications join specific groups as individual members. On joining a group a member can send or receive messages. Individual messages are assigned to specific transport classes, based on the message's size. Each transport class owns input and output buffers. Routing decisions are made at the transport class level.
XCF é uma facilidade para gerenciar recursos e dados entre sistemas quem gerencia a comunicação são as tasks tcp/ip ou vtam ou a CF

XRC (Extended Remote Copy)
An asynchronous remote-copy capability that works with IBM's MVS operating system.


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