PAR Technologies V5 manual P4tcp, Add, Delete

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)

ParaStation5 Administrator's Guide 73