Changes between Version 8 and Version 9 of PlasticSlices/Experiments

Timestamp:

07/11/11 15:29:00 (13 years ago)

Author:

Josh Smift

Comment:

--

PlasticSlices/Experiments

@@ -730 +730 @@
 = SteadyPerfTCP =
 
-This experiment uses the iperf command to send 1 GB of data via TCP, measuring performance throughout the transfer.
+This experiment uses the iperf command to send data via TCP, measuring performance throughout the transfer. Note that it doesn't allow you to directly control the rate at which data is sent.
 
 == Setup ==
@@ -777 +777 @@
 {{{
 server=<ipaddr>
-nice -n 19 iperf -c $server -p <port> -t 86400
+nice -n 19 iperf -c $server -p <port> -t <time>
 }}}
 
@@ -836 +836 @@
 Identify a port that you'd like to use for the connection; call it <port>, and use it below when you run the iperf server and client commands.
 
-Divide 1000 by the number of host pairs you have (the number of rows in your table); call this number <size>, and use it below when you run the iperf client command. (This is how much data (in megabytes) each client will send to the server.)
-
-Decide how fast you'd like to send data (in megabits per second); call this number <rate>, and use it below when you run the iperf client command.
+Divide 10 (megabits per second) by the number of host pairs you have (the number of rows in your table); call this number <rate>, and use it below when you run the iperf client command. (You may want to round up to the nearest integer for simplicity.)
+
+Decide how long (in seconds) you'd like to transfer data for; call that <time>, and use it below when you run the iperf server and client commands.
 
 On each client and server, install iperf:
@@ -868 +868 @@
 {{{
 server=<ipaddr>
-nice -n 19 iperf -u -c $server -p <port> -n <size>M -b <rate>M
-}}}
-
-using the "server=<ipaddr>" line from your table, and the <port>, <size>, and <rate> values you identified earlier. That should print a few lines on your terminal immediately, including ones like
+nice -n 19 iperf -u -c $server -p <port> -t <time> -b <rate>M
+}}}
+
+using the "server=<ipaddr>" line from your table, and the <port>, <time>, and <rate> values you identified earlier. That should print a few lines on your terminal immediately, including ones like
 
 {{{