Test Network and Connection Quality

Like other network related applications, the performance of RollSite largely depends on proper configurations. To well tune RollSite, the actual network and connection quality measurement is a prerequisite.

We provided 2 scripts to test the network and connection quality. They both based on iperf3, acting as server and client.

iperf3 is an open source tool to measure IP networks. It can be installed via apt-get or yum in many Linux distributions and brew in Mac. For more information about iperf3, please visit https://iperf.fr/.

1. server

usage: ${EGGROLL_HOME}/bin/iperf3-server.sh ${port}

example: ${EGGROLL_HOME}/bin/iperf3-server.sh 9370

parameters:

port - specifies a port which iperf server binds on and listens to

2. client

usage: ${EGGROLL_HOME}/bin/iperf3-client.sh ${ip} ${port} ${bandwidth}

example: ${EGGROLL_HOME}/bin/iperf3-client.sh 192.168.0.1 9370 50m

parameters:

ip - specifies the ip address where the corresponding iperf3-server.sh runs

port - specifies the port where the corresponding iperf3-server.sh runs

bandwidth - the bandwidth between the 2 sites. This is used by iperf3 to simulate network speed

3. notes

3.1. iperf3-server.sh and iperf3-client.sh are run manually when needed (and possibly consented). Operators on both sites need to be coordinate to perform a network and connection test.

3.2. There are 8 tests in the client script:

• 1. TCP test at specified bandwidth (bps) (e.g. at 10m), client to server;
• 2. TCP test at specified bandwidth (bps) (e.g. at 10m), server to client;
• 3. TCP test at 1mbps, client to server;
• 4. TCP test at 1mbps, server to client;
• 5. TCP test at specified bandwidth (bps) (e.g. at 10m), 10 parallel connection threads, client to server;
• 6. TCP test at specified bandwidth (bps) (e.g. at 10m), 10 parallel connection threads, server to client;
• 7. UDP test at specified bandwidth (bps) (e.g. at 10m), client to server;
• 8. UDP test at specified bandwidth (bps) (e.g. at 10m), server to client.

Each test takes 10 sec, so a total of 80 sec required for all 8 tests to complete. iperf3 prints certain logs and results on stdout. Via these logs can we know the actual bandwidth and quality.