Looks like it means basically reverting of: https://github.com/rpm-software-management/yum/commit/ad9eb71cc910a67c02985e963afb19e3721f0e96 Effectively, if there are some networking issues (which happens just now internally for one server hosting a lot of package repositories), dnf re-tries downloading from timeout'ing servers. Having N repositories from such server means (N x retries x timeout) delay, which makes dnf totally unusable for a lot of internal customers. Even when we have set skip_if_unavailable=True.
I meant this one: https://github.com/rpm-software-management/yum/commit/31a4a3bcb48b67231dc0314d9ed2693eb1e41b6d
Ah, the retries= option is applied on timeouts only in yum -- that's good actually. Though dnf doesn't perform well neither in this case. At least there seems to be default timeout of 2 minutes for repository download. Not having repo downloading in parallel, dnf hangs for 2*N minutes for N repositories from one server (can be simulated by iptables -I OUTPUT -d <IP> -j DROP). Seems like bug 1210325, so I reopened it. Except for parallelizing, dnf could special case the downloads where no single byte was downloaded for much shorter timeout.. Would that make sense?
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