The CA Vtape P2P Option is a separately licensed component which uses TCP/IP to provide real time remote duplexing of Virtual Volumes. TCP/IP is used to provide a geoplex environment where you can dynamically create the same Virtual Volume in independent CA Vtape Subsystems synchronously or asynchronously. The only thing shared between the two subsystems is a subset of the Virtual VOLSERs. Each subsystem can create its own Backstore Copies of the shared Virtual VOLSERs. One application of P2P would be to create Virtual Volumes for critical applications at a disaster recover site in real time without the need to physically transport tapes.
The CA Vtape P2P Option activates several subtasks that are not part of a non-P2P subsystem. These subtasks manage communications between the local (sending) and remote (receiving) subsystems and provide the following functions:
This subtask manages remote TCP/IP connection requests. The P2P Listener routes connection requests to an appropriate P2P Server.
This subtask analyzes and processes remote transaction requests. P2P Servers handle transactions such as remote Virtual Volume file transfers, Client Drive connection requests (dial requests), issues remote commands and displays remote responses, and processes local commands which initiate or manage remote connections.
These are local subtasks which provide real time duplexing for Virtual Volumes running on remote systems..
This subtask establishes an EMCS console which is used to transmit remote console command responses back to the appropriate Remote System.
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