CDN not caching properly?
Hi all, I have a slight issue with my setup, and am in need of advice. Basically, all my video files are hosted on an S3 instance, which pass through a CDN before going on to the channel viewers. I...
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I ran into a similar issue with Leaseweb a couple of months ago, after a correctly working account was "migrated" to a new account. There were 2 different settings in the Leaseweb CDN that caused an inordinate amount of transfers out of the S3 origin into the CDN cache. One was a TTL (time to live) policy option to "Honor Origin TTL" - this needed to be disabled. The other setting was the TTL that is used when not using the origin TTL, the default value of which was 86400 (1 day) - this needed to be changed to 2592000 (30 days). After doing this the cache hits increased from under 70% to about 99% and the S3 traffic decreased back to a minimal level.
That's what we think is going on here. It worked fine with 93% cache hits up util about a month ago when they had some "emergency maintenance" and since then it's been 0% cache across the board.
One of their techs finally replied this morning asking me to add an explicit header to our S3 links with a "Expiry:max-age=15811200" metadata. I'm doubtful, but trying it before moving to a new CDN.
