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ParaStation5 Administrator's Guide 73
p4tcp
p4tcp — configure the ParaStation4 TCP bypass.
Synopsis
p4tcp [ -v ] [ -a ] [ -d ] [ -? ] [ from [ to ]]
Description
p4tcp configures the ParaStation4 TCP bypass. Without an argument, the current configuration is printed.
From and to are IP addresses forming an address range for which the bypass feature should be activated.
Multiple addresses or address ranges may be configured by using multiple p4tcp commands.
To enable the bypass for a pair of processes, the library libp4tcp.so located in the
directory /opt/parastation/lib64 must be pre-loaded by both processes using:
export LD_PRELOAD=/opt/parastation/lib64/libp4tcp.so
For parallel and serial tasks launched by ParaStation, this environment variable is
exported to all processes by default. Please refer to ps_environment(5).
Options
-a, --add
Add an address or an address range to the list of redirected addresses. New TCP connections directed
to a node within this address range may use the p4sock protocol for data transfer.
-d, --delete
Delete an address or address range from the list of redirected addresses. New TCP connections to
this address(es) will no longer use the p4sock protocol.
-v, --version
Output version information and exit.
-?, --help
Show a help message.
--usage
Display a brief usage message.
See also
p4stat(8)