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MCKEY(1)				    librdmacm					 MCKEY(1)

NAME
       mckey - RDMA CM multicast setup and simple data transfer test.

SYNOPSIS
       mckey -m multicast_address [-s] [-b bind_address] [-c connections]
		 [-C message_count] [-S message_size] [-p port_space]
       mckey -m multicast_address -s [-b bind_address] [-c connections]
		 [-C message_count] [-S message_size] [-p port_space]
       mckey -M unmapped_multicast_address -b bind_address [-s] [-c connections]
		 [-C message_count] [-S message_size] [-p port_space]

DESCRIPTION
       Establishes a set of RDMA multicast communication paths between nodes using the librdmacm,
       optionally transfers datagrams to receiving nodes, then tears down the communication.

OPTIONS
       -m multicast_address
	      IP multicast address to join.

       -M unmapped_multicast_address
	      RDMA transport specific multicast address to join.

       -s     Send datagrams to the multicast group.

       -b bind_address
	      The local network address to bind to.

       -c connections
	      The number of QPs to join the multicast group.  (default 1)

       -C message_count
	      The number of messages to transfer over each connection.	(default 10)

       -S message_size
	      The size of each message transferred, in bytes.  This value must	be  smaller  than
	      the MTU of the underlying RDMA transport, or an error will occur.  (default 100)

       -p port_space
	      The  port space of the datagram communication.  May be either the RDMA UDP (0x0111)
	      or IPoIB (0x0002) port space.  (default RDMA_PS_UDP)

NOTES
       Basic usage is to start mckey -m multicast_address on a server system, then run	mckey  -m
       multicast_address -s on a client system.

       Unique Infiniband SA assigned multicast GIDs can be retrived by invoking mckey with a zero
       MGID or IP address.  (Example, -M 0 or -m 0.0.0.0).  The assigned  address  will  be  dis-
       played to allow mckey clients to join the created group.

       Because	this  test  maps  RDMA	resources  to userspace, users must ensure that they have
       available system resources and permissions.  See the libibverbs README file for additional
       details.

SEE ALSO
       rdma_cm(7), ucmatose(1), udaddy(1), rping(1)

librdmacm				    2007-05-15					 MCKEY(1)
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