Stress Test: spray

TEST NAME

spray_6 - use RPC to send one-way stream of packets to host on IPv6

SYNOPSIS

ksh spray_6.sh remote

DESCRIPTION

spray_6 uses RPC to send a one-way stream of packets to the host, and reports the number received and the transfer rate.

OPERANDS

remote

Either a host name or IPv6 address of a machine to which files and directories are copied. If a host name is specified, the host name must appear in /etc/inet/ipnodes along with the remote machine's IPv6 address.

USAGE VARIABLES

RUNTIME

This environment variable specifies, in seconds, the duration of the test.

SETUP

You need two machines connected by a network, either back-to-back, or through a hub or switch.

OUTPUT

As each set of 50,000 packets is transmitted, spray_6 produces output that details the packet loss and rate of transmission.

DURATION

24 hours

POSSIBLE CONCURRENT TESTS

This test can run concurrently with cl3se3_6, lsalr_6, mpflip, ftpstress_6, and scp_6.

CAVEATS

The spray_6 test uses unreliable connectionless transports (UDP).

spray_6 can report a large number of packets dropped when the drops were caused by spray_6 sending packets faster than they can be buffered locally (before the packets get to the network medium).

EXAMPLES

      # RUNTIME=1800
      # export RUNTIME
      # ./spray_6.sh harvey240
      Running time: 1800 seconds
      sending 50000 packets of length 8192 to harvey240 ...
              100 packets (0.200%) dropped by harvey240
              145 packets/sec, 1194721 bytes/sec
      sending 50000 packets of length 8192 to harvey240 ...
              41 packets (0.082%) dropped by harvey240
              146 packets/sec, 1200000 bytes/sec
      sending 50000 packets of length 8192 to harvey240 ...
              52 packets (0.104%) dropped by harvey240
              146 packets/sec, 1199743 bytes/sec
      sending 50000 packets of length 8192 to harvey240 ...
              105 packets (0.210%) dropped by harvey240
              146 packets/sec, 1198396 bytes/sec
      sending 50000 packets of length 8192 to harvey240 ...
              55 packets (0.110%) dropped by harvey240
              146 packets/sec, 1199550 bytes/sec
      sending 50000 packets of length 8192 to harvey240 ...
              541 packets (1.082%) dropped by harvey240
              146 packets/sec, 1199254 bytes/sec
      !PASS: Spray_6 completed

REFERENCES

spray(1M), hosts(4), udp(7P)