Hey! So the nar-herder came in to existence at the end of last year (2021) and while the main use at the time was addressing the lack of storage on bayfront, I also hoped to improve the situation regarding mirrors for substitutes. I'm not in a great situation to test this though, as my usual internet connection is slow enough that a closer mirror probably won't make much difference. So, one thing that I'd be interested in, is hearing from anyone who thinks they get worse download performance from bordeaux.guix.gnu.org or ci.guix.gnu.org than they get when downloading other things. Importantly, it would be good to know roughly where (geographically) the machine doing the downloading is, and some data to show the difference. For example, I'm in the United Kingdom in Europe, and this is the output from wget downloading a ~200M file from bordeaux.guix.gnu.org: → wget https://bordeaux.guix.gnu.org/nar/lzip/078vr3r8mn3yrwzwxw64hmcyshic9p3q-stellarium-0.21.0 --2022-05-20 16:49:56-- https://bordeaux.guix.gnu.org/nar/lzip/078vr3r8mn3yrwzwxw64hmcyshic9p3q-stellarium-0.21.0 Resolving bordeaux.guix.gnu.org (bordeaux.guix.gnu.org)... 2a0c:e300::58, 185.233.100.56 Connecting to bordeaux.guix.gnu.org (bordeaux.guix.gnu.org)|2a0c:e300::58|:443... connected. HTTP request sent, awaiting response... 200 OK Length: 208615205 (199M) [text/plain] Saving to: ‘078vr3r8mn3yrwzwxw64hmcyshic9p3q-stellarium-0.21.0.6’ 078vr3r8mn3yrwzwxw64 100%[======================>] 198.95M 4.24MB/s in 46s 2022-05-20 16:50:43 (4.31 MB/s) - ‘078vr3r8mn3yrwzwxw64hmcyshic9p3q-stellarium-0.21.0.6’ saved [208615205/208615205] Also, I've setup a US based (Hetzner data center, east coast) mirror of bordeaux.guix.gnu.org: https://bordeaux-us-east-mirror.cbaines.net/ So, I'd also be interested in seeing how that performs for people, and how it compares against bordeaux.guix.gnu.org, which is hosted in France in Europe. Here's my output from wget: → wget https://bordeaux-us-east-mirror.cbaines.net/nar/lzip/078vr3r8mn3yrwzwxw64hmcyshic9p3q-stellarium-0.21.0 --2022-05-20 16:50:44-- https://bordeaux-us-east-mirror.cbaines.net/nar/lzip/078vr3r8mn3yrwzwxw64hmcyshic9p3q-stellarium-0.21.0 Resolving bordeaux-us-east-mirror.cbaines.net (bordeaux-us-east-mirror.cbaines.net)... 5.161.49.48 Connecting to bordeaux-us-east-mirror.cbaines.net (bordeaux-us-east-mirror.cbaines.net)|5.161.49.48|:443... connected. HTTP request sent, awaiting response... 200 OK Length: 208615205 (199M) [text/plain] Saving to: ‘078vr3r8mn3yrwzwxw64hmcyshic9p3q-stellarium-0.21.0.7’ 078vr3r8mn3yrwzwxw64 100%[======================>] 198.95M 4.17MB/s in 47s 2022-05-20 16:51:32 (4.22 MB/s) - ‘078vr3r8mn3yrwzwxw64hmcyshic9p3q-stellarium-0.21.0.7’ saved [208615205/208615205] Now, performance is probably a bit more complicated than just download speed. The US mirror holds the narinfo information locally, which should enable it to respond to requests more quickly, reducing latency, but this is a little harder to test. Thanks, Chris