I have a problem with an ZFS problem, and done fair bit of isolating, but getting stuck.
Server1 – ZFS host, openbsd
Server2 – Workhorse that has ZFS drive mounted, ubuntu
An untar operation on the ZFS drive takes 2s on Server1. The same operation on the mounted ZFS drive takes 5 minutes (!) on Server2.
Both servers are connected via gigabit LAN and literally next to each in a rack. What should I check, what can I tune?
iperf says “940 Mbits/sec” in both directions. Network speed is not the issue here.