Page History

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• Using Apache Benchmarks every hour to load http://almascience.nrao.edu/ on rastan.aoc.nrao.edu
  • ssh.aoc.nrao.edu:/users/krowe/alma_archive/benchmarks/almascience.nrao.edu/data (times are in milliseconds)
    • Mode load time is 98ms
  • ssh.aoc.nrao.edu:/users/krowe/alma_archive/benchmarks/almaportal.cv.nrao.edu/data (times are in milliseconds)
    • Mode load time is 123ms
• Using download script to get 2013.1.00226.S-small (no ASDM tarballs) every hour on cvpost-master.aoc.nrao.edu
  • ssh.cv.nrao.edu:/lustre/cv/users/krowe/tickets/scg-207/benchmarks/almascience.nrao.edu/2013.1.00226.S-small
    • 2022-08-16: average time to download about 700MB is 42 seconds or about 16MB/s
• iperf tests using iperf3 -s -B <local IP> and  iperf3 -B <local IP> -c <dest IP>
  
• 2022-08-15 krowe: I had tcpdump running on each na-arc-{1..5} nodes watching for traffic from almaportal tcpdump dst almaportal.  Then I would run the following wget on cvpost-master.  The first execution would be shown by tcpdump on na-arc-1, the second execution on na-arc-2 and so forth.  This is because of the round-robin nature of the web proxy on almaportal and was a nice confirmation of that process.  However, each execution also downloaded at about 32KB/s (0.3Mb/s) after a minute or so of downloading, which is about 300 times slower than expected.  Using the test swarm (natest-arc-{1..3}) I can download the same file at about 10MB/s (100Mb/s). Also, I did not see any difference in performance across the five nodes which was also surprising given that one of the nodes runs the downloader container and the other four need to forward traffic to the one download container.
  • cvpost-master wget --no-check-certificate https://almaportal.cv.nrao.edu/dataPortal/2013.1.00226.S_uid___A001_X122_X1f1_001_of_001.tar
• 2022-08-15 krowe: I ran iperf tests from end to end and don't see any unexpected performance.
  
  • [nangas11] -- ~900Mb/s --> [rh-download container on na-arc-5] -- ~8,000Mb/s --> [almaportal] -- ~900Mb/s --> [cvpost-master]
  • [nangas11] -- ~900Mb/s --> [na-arc-5] -- ~8,000Mb/s --> [almaportal] -- ~900Mb/s --> [cvpost-master]

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