SPRAY(8) Maintenance Commands and Procedures SPRAY(8)

NAME

spray - spray packets

SYNOPSIS

/usr/sbin/spray [-c count] [-d delay] [-l length]
[-t nettype] host

DESCRIPTION

spray sends a one-way stream of packets to host using RPC, and
reports how many were received, as well as the transfer rate. The
host argument can be either a name or an Internet address.


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

OPTIONS

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


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


-l length
The length parameter is the numbers 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 spray 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, so the length field no longer has a simple
correspondence to Ethernet packet size. The default
value of length is 86 bytes, the size of the RPC and
UDP headers.


-t nettype
Specify class of transports. Defaults to netpath. See
rpc(3NSL) for a description of supported classes.

SEE ALSO

rpc(3NSL), attributes(7)

November 6, 2000 SPRAY(8)