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depingus · 2022-05-27 21:18:29

Aren't CDN's usually caching legit data though?

hnlmorg | karma 8222 | avg karma 2.79 · | 2022-05-28 04:54:10

CDNs caches will only be as legit as the customers using them. And since moderating content at scale is a hard problem, one cannot assume all CDN data is legit.

m463 | karma 17870 | avg karma 1.89 · | 2020-07-10 02:27:31+00:00

I think most CDNs nowadays do not cache as much as you think because they are used for tracking.

recursive | karma 9788 | avg karma 2.06 · | 2022-08-16 11:52:21

No, they have not always done this. But the supposed caching benefits of CDNs have always been overstated.

toomuchtodo | karma 88050 | avg karma 2.82 · | 2017-04-24 21:19:47+00:00

Nope, spot on. You either cache extremely aggressively with a CDN if you can, or otherwise you eat the data out charges for dynamic data.

mercer | karma 6152 | avg karma 1.42 · | 2019-02-13 22:25:12

I wish I could find it, but I read an article a while ago that showed how CDN-cached stuff usually, well, isn't. At the very least it's not something to rely on when making decisions about payload size.

nawitus | karma 3654 | avg karma 2.15 · | 2016-03-20 17:52:29+00:00

Wouldn't the CDN'd resource be already cached for most users (if we're talking about the average, often used resource)?

kenjackson | karma 20413 | avg karma 3.83 · | 2011-02-24 19:25:46

If you use a CDN isn't it cached across multiple sites?

chatmasta | karma 18107 | avg karma 3.55 · | 2018-06-08 15:47:43+00:00

This is true, but how could a CDN possibly cache a response without access to it? Unfortunately it seems to be a necessity.

Cthulhu_ | karma 26640 | avg karma 2.23 · | 2014-02-07 08:23:01+00:00

It kinda depends on statistics; I'd like to see some figures about CDN cache hits like that. I know the theory is sound, but I also gathered that one usually only gets 20% cache hits on websites with caching enabled. or something.

ApolloFortyNine | karma 3129 | avg karma 3.34 · | 2023-11-28 07:40:37

Wouldn't that interpretation work itself out in a number of hours? CDNs are usually just a hot cache no?

parliament32 | karma 3348 | avg karma 3.0 · | 2019-10-22 17:17:31+00:00

A sane CDN doesn't cache error responses. There is no legitimate reason to cache a non 2xx/3xx response, unless you / your CDN is really pinching pennies.

Caching a 5xx kinda makes sense I guess, but a 4xx client error? That's nuts.

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notlisted | karma 1225 | avg karma 3.25 · | 2016-10-24 18:21:31

If included, in full, via a CDN, wouldn't this be mostly cached? (I use bootstrapCDN)

dextorious | karma 1192 | avg karma 1.63 · | 2011-11-20 08:32:02+00:00

"""1) You can't always count on users having cached it from the CDN."""

No, but you can always count the MAJORITY of users will have it cached from the CDN.

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collsni | karma 290 | avg karma 1.86 · | 2023-11-23 06:30:52

Seems like this site could used a caching CDN lol

ddorian43 | karma 2409 | avg karma 1.09 · | 2020-07-21 09:58:39

All CDN use byte-range caching too.

catern | karma 2275 | avg karma 4.08 · | 2021-11-07 15:53:39

That's the cache in the browser, not the cache in the CDN.

vel0city | karma 6168 | avg karma 1.63 · | 2024-05-20 02:39:40

Cached with what? The $0 cost hardware you gave to the ISP for free? You expect every ISP is just going to give you free CDN services?

wreegab | karma 317 | avg karma 2.86 · | 2013-11-27 17:47:15+00:00

If it is in the cache, why is the CDN needed anyways?

maple3142 | karma 1534 | avg karma 5.31 · | 2023-07-25 09:43:18

I don't think that would play well with cdn caching.