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by noelwelsh
4603 days ago
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We use MaxCDN. It seems to work well, but I find all CDNs fairly opaque. How can I actually measure latency? I can't with web browsers being the way they are, so I really have no way of knowing. (There is http://www.w3.org/TR/navigation-timing/ but it is very limited, and not suitable for us.) Clarification psated from a comment I made below: Sure, I can test my latency, but I'm more interested in what my customers are experiencing. For instance, we have a big customer over in east Asia and I have very little idea what latency they get. When we were using Cloudfront a customer in Australia complained that they were seeing timeouts. It seems there was a bug in Amazon's routing table as Cloudfront has a POP in Sydney but their requests were going somewhere much further away. |
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I'm using Cloudfront with the origin option for a subset of our users. I've found a few clients with so restrictive or broken firewall rules that I had to add an option to default to getting the files from the source if users come from network X or Y. While cloudfront lets you download the log files, you get one S3 object per edge location per 15 minutes or something like that, so 1000s per day, which made things difficult to troubleshoot (I suspect the problem with one user was partial cache due to Apache's deflate sending responses as chunked encoding as default and Amazon's origin spider sometime dropping such connections).