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spray(1M)							     spray(1M)

NAME
       spray - spray packets

SYNOPSIS
       count] delay] length] nettype] host

DESCRIPTION
       sends  a	 one-way stream of packets to host using RPC, then reports how
       many were received by host and what the transfer rate  was.   The  host
       name can be either a name or an internet address.

       is  not useful as a networking benchmark, as it uses unreliable connec‐
       tionless transports, UDP, for example.  can report a  large  number  of
       packets	dropped	 when  the drops were caused by sending packets faster
       than they can be buffered locally, that is, before the packets  get  to
       the network medium.

   Options
       recognizes the following options and command-line arguments:

	      Specify how many packets to send.
			     The default value of count is the number of pack‐
			     ets required to make the total stream size 100000
			     bytes.

	      Specify  how  many  microseconds	to  pause between sending each
	      packet.
			     The default is 0.

	      Specify the number of bytes in the Ethernet  packet  that	 holds
	      the RPC
			     call  message.   Since  the data is encoded using
			     XDR, and XDR only deals with 32  bit  quantities,
			     not all values of length are possible, and rounds
			     up to the nearest possible value.	When length is
			     greater  than  1514,  then	 the  RPC  call can no
			     longer be encapsulated in	one  Ethernet  packet.
			     In	 that  case,  the length field no longer has a
			     simple  correspondence  to	 the  Ethernet	packet
			     size.   The  default value of length is 86 bytes,
			     the size of the RPC and UDP headers.

	      Specify class of transports.
			     Defaults to See rpc(3N) for a description of sup‐
			     ported classes.

AUTHOR
       was developed by Sun Microsystems, Inc.

SEE ALSO
       ping(1M), sprayd(1M), rpc(3N).

								     spray(1M)

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