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This to announce that the technical team is going ahead with the migration of the nLab installation to a new server:
The migration will take place this Friday (7 Oct, 2022) at 15 CET / 13 UTC.
They will start by switching the nLab and nForum to read-only. During this time, you will get an error message if you try to edit or post in the nForum.
At the end of the migration, they will point the nLab and nForum to the new server and editing/posting will work again.
It may be that some things are broken afterwards. If you notice any, please post them here!
How long will the migration take?
Krzysztof Kiszka
Between 10 minutes and 6 hours.
The migration has concluded. If you find anything broken, please notify us here.
Well done! I’d guess it’s just a question of scaling something up, but based in Europe, both the nLab and the nForum are unusably slow at loading the majority of pages, on both a phone and computer. The problem seems slightly worse for the nForum, although I’ve not tried many nLab pages, so it might be equally bad there. At times the pages load fine, but currently for example almost everything is terribly slow.
More precisely, I’d guess the nLab pages which are loading quickly are those which are cached, i.e. either the server processing or the database or both must be the bottleneck.
I’m based in the United States and the nLab and the nForum take longer to load as well.
Unlike the two guests above I don’t have any problems loading new uncached pages on the nLab and nForum.
Looks Cloudflare-related. I’ve purged the cache and the problem seems to have disappeared. Let’s see if it comes back.
Same as before for me (same as #5 and #6) unfortunately. unfortu
I’ve disabled Cloudflare for now. Let’s see how we fare.
Seems much better now, thanks!
TikZ diagrams no longer compile.
For example, trying to save the following code:
\begin{tikzcd} A \end{tikzcd}
produces the following error:
[Errno 2] No such file or directory: ’pdftocairo’
It appears that nLab’s TikZ rendering module requires the pdftocairo software in the poppler package, which apparently is not installed on the new server.
Thanks for reporting! Should be fixed now.
The Discuss link at the bottom of the HomePage links to https://saunders2.andrew.cmu.edu:8009/discussion/3545/#Item_94 rather than https://nforum.ncatlab.org/discussion/3545/#Item_94/.
Similarly, the link to Current at this nLab edit announcement goes to https://saunders2.andrew.cmu.edu:8008/nlab/show/contraction rather than https://ncatlab.org/nlab/show/contraction.
Thanks, both fixed!
Google Search now shows URLs like
https://www.ncatlab.org/nlab/show/determinant+line+bundle
when searching for nLab topics.
These URLs do not resolve properly. I presume the problem is caused by an improper setup of redirects (www.ncatlab.org → ncatlab.org) for the web server.
Also, somehow Google Search now thinks that www.ncatlab.org is the “canonical” form, which presumably should also be adjusted on the server side.
Should be fixed now. One problem was that www.ncatlab.org was not included in the SSL certificate.
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