I’ve been chasing down an issue on my site in regards to uploading files more than 100mb. We have determined that this only happens when Cloudflare is enabled. After a little research it seems that Cloudflare only does < 100mb on the Pro tier.
I really don’t want to put a rule to my /uploads that bypasses cache for EVERYTHING… Only bypass for those larger than 100mb.
I tried to add a rule to bypass cache for specific uri, but that doesn’t appear to be working. Everything works as expected if I change to DNS-Only mode… If I have to go DNS-Only I don’t see why I would continue paying CF.
It’s not cache limiting upload size. Cache is 512 MB per file limit for free/Pro/Biz (and any larger files are just streamed from the origin every time and not kept in cache). There is a specific limit for upload size per plan type, 100 MB for free/pro, 200MB for business, and 500 MB or more for Enterprise: Default Cache Behavior · Cloudflare Cache (CDN) docs
If you require a larger upload, group requests smaller than the upload thresholds or upload the full resource through an unproxied (grey-clouded) DNS record.
There’s no other way around it then that, or upgrading
Or chunking uploads.
That seems to be the answer… My CMS uses chinking, but I had the upload_max_filesize / post_max_size values set way too high. Changed them to 50M and now the software is chunking and uploading correctly now. Thank you.
Nice your CMS supports chunking… not common enough. 
Glad that solves your issue. On some level it’s an arbitrary limit, but all limits on Cloudflare are arbitrary and drawing lines is always fuzzy. Glad this solved your issue!
If it’s not a custom solution, would you mind giving the name of the CMS? Thanks.
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