LoadTestsP2

We have brought forward some of the content from the previous LoadTestsP1.

Site and host information

The following are the current sites, contact information, and host details:

• NIC speed: "ethtool eth0" (or eth1, eth2, etc)
• NIC driver: "ethtool -i eth1"
• MTU: "ifconfig eth0" (or eth1, eth2, etc)
• net.ipv4.tcp_wmem, net.ipv4.tcp_rmem, net.core.netdev_max_backlog: "sysctl -a | grep net"

Load tests

Oct 17

Loadtesting graph in MB/s (1 stream, 8MB window, max statistic chosen)

Problematic machines:

• dq2.aglt2.org (gridftp)
• gk01.swt2.uta.edu (gridftp)
• tier2-02.ochep.ou.edu (all)
• tier2-03.ochep.ou.edu (all)

Oct 11

The following shows graphs of MB/s for different number of streams. Note that some of the services on chigaco and iu where having problems when the 1 and 2 stream graphs were generated.

• 2 streams:
  

• 4 streams:
  

• 8 streams:
  

• 16 streams:
  

Other links

• TCP Tuning at http://www.psc.edu/networking/projects/tcptune/ and http://www-didc.lbl.gov/TCP-tuning/
• Dashboard at https://www.racf.bnl.gov/Facility/Monitor/dashboard.html
• Configurations at https://svn.usatlas.bnl.gov/svn/usatlas-int/load-test/Control/conf/
• Subversion instructions are here http://www.usatlas.bnl.gov/twiki/bin/Projects/GridDevHowTo.html