SCACP

SCACP (the SCA Control Program) is a system management tool for monitoring and managing cluster communications.

Running the Utility

To invoke SCACP, execute $ MCR SCACP or $ RUN SYS$SYSTEM:SCACP. Using SCACP requires SYSPRV.

Commands

• SHOW VC displays PEDRIVER virtual circuit information. Each virtual circuit is an SCACP communications path between the local system and a remote system comprised of a set of channels.
• SHOW CHANNEL displays PEDRIVER channel information for specific nodes. Each channel is a single NISCA communications path between a LAN device on a local system and a LAN device on the remote system.
• SHOW LAN_DEVICE displays PEDRIVER LAN device information. Each device is a local LAN device on the system, which can be used for NISCA communications.
• SHOW IP_INTERFACE displays the PEdriver device IP interface data. Each device is an IP interface on the system which can be used for NISCA communications.
• SHOW PORT displays information about selected SCA ports.
• SHOW TRACE displays PEDRIVER tracing data and parameters.
• SET CHANNEL sets channel management parameters (currently restricted to priority).
• SET VC sets virtual circuit management parameters: checksumming, compression, ECS delay threshold, transmit window size, and receive window size values.
• SET LAN_DEVICE sets device management priority parameter.
• SET IP_INTERFACE sets IP interface management priority parameter.
• SET PORT sets a port management priority value.
• SET TRACE sets or modifies PEDRIVER tracing parameters.
• START IP_INTERFACE directs PEDRIVER to start using the specified IP interface.
• START LAN_DEVICE directs PEDRIVER to start using the specified LAN device.
• STOP IP_INTERFACE directs PEDRIVER to stop using the specified IP interface.
• STOP LAN_DEVICE directs PEDRIVER to stop using the specified LAN device.
• STOP TRACE stops PEDRIVER tracing.
• CALCULATE WINDOW_SIZE calculates a recommended virtual circuit window size based on distance and aggregate line speed between two nodes.

See also

• Guidelines for OpenVMS Cluster Configurations
• OpenVMS Cluster Systems