A bit of banging away later — I haven’t touched Linux traffic shaping in some years — I’ve got a quick-and-dirty script to set a machine up to temporarily simulate a slow inbound interface for testing.
:::spoiler slow.sh test script
# !/bin/bash # Linux traffic-shaping occurs on the outbound traffic. This script # sets up a virtual interface and places inbound traffic on that virtual # interface so that it may be rate-limited to simulate a network with a slow inbound connection. # Removes induced slow-down prior to exiting. # Physical interface to slow; set as appropriate oif="wlp2s0" modprobe ifb numifbs=1 ip link set dev ifb0 up tc qdisc add dev $oif handle ffff: ingress tc filter add dev $oif parent ffff: protocol ip u32 match u32 0 0 action mirred egress redirect dev ifb0 tc qdisc add dev ifb0 root handle 1: htb default 10 tc class add dev ifb0 parent 1: classid 1:1 htb rate 1mbit tc class add dev ifb0 parent 1:1 classid 1:10 htb rate 1mbit echo "Rate-limiting active. Hit Control-D to exit." cat # shut down rate-limiting tc qdisc delete dev $oif ingress tc qdisc delete dev ifb0 root ip link set dev ifb0 down rmmod ifb
:::
I’m going to see whether I can still reproduce that git failure for Cataclysm on git 2.47.2, which is what’s in Debian trixie. As I recall, it got a fair bit of the way into the download before bailing out. Including here since I think that the article makes a good point that there probably should be more slow-network testing, and maybe someone else wants to test something themselves on a slow network.
Probably be better to have something a little fancier to only slow traffic for one particular application — maybe create a “slow Podman container and match on traffic going to that?” — but this is good enough for a quick-and-dirty test.
mesamunefire@piefed.social 4 months ago
I remember there is some timeout flags you can do on curl that you can use in conjunction with git...but its been nearly a decade since Ive done anything of the sort. Modern day GitHub is fast-ish...but yeah bigger stuff has some big git issues.
Good points! Didn't know about Lemmyverse.net!
rimu@piefed.social 4 months ago
As a PieFed user, soon you don't need to - piefed instances will automatically subscribe to every community in newcommunities@lemmy.world so the local communities-finder will always have everything you ever need.
Coming in v1.2.
mesamunefire@piefed.social 4 months ago
coo! Thats great. Thanks again!