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  • Why is na-arc-5 using qdisc pfifo_fast for eth0 while all the other na-arc nodes and natest-arc nodes are using qdisc fq_codel for eth0? (see ip addr)
    • na-arc-5 is running the rh-downloader service so its interface would affect all downloads.
    • Should we change it to match with something like tc qdisc replace dev eth0 root fq_codel
    • I see ZeroWindow packets sent from na-arc-5 to nangas13 while downloading a file from nangas13 using wget.  This is na-arc-5 telling nangas13 to wiat because its network buffer is full.  Is this because of qdisc pfifo_fast?
  • Why does natest-arc-3 have ens3 instead of eth0 and why is its speed 100Mb/s?
    • virsh domiflist natest-arc-3 shows the Model as rtl8139 instead of virtio
    • When I run ethtool eth0 on nar-arc-{1..5} natest-arc-{1..2} as root, the result is just Link detected: yes instead of the full report with speed while na-arc-3 shows 100Mb/s.
  • Is putting the production swarm nodes (na-arc-*) on the 10Gb/s network a good idea?  Sure it makes a fast connection to cvsan but it adds one more hop to the nangas servers (e.g. na-arc-1 -> cv-nexus9k -> cv-nexus -> nangas11)
  • When I connect to the container acralmaprod001.azurecr.io/offline-production/rh-download:2022.06.01.2022jun I get errors like unknown user 1009  I get the same errors on the natest-arc-1 container.
  • Can we put 10Gb/s NICs in the nangas nodes?
  • Why does almaportal use ens3 while almascience uses eth0?
  • What if we move the rh-downloader container to a different node?  In fact walk it through all five nodes and test.

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