How does CF cname flattening work with CF proxying and workers? If I flatten a cname will my worke

How does CF cname flattening work with CF proxying and workers?

If I flatten a cname will my worker never trigger because the response the DNS gives will cause the request to just skip cloudflares network?

Eelpupper so whats the latency like with KV or R2 with workers in the same region?

Chaika•10/31/24, 4:07 PM

R2 can be pretty quick, it's not the most consistent performance though. I think ~100ms or so uncached to R2, like EWR/ORD to ENAM bucket on average is around that. Just using workers binding and not cache.

If you use cache, either with r2 custom domain or cache binding, of course gets super quick, like under 40-50ms from all locations as long as you hit cache

KV is more complex. You don't have region control, the two central stores are always EU/US. Cached it's great, espec after recent perf changes, maybe knock off 10ms from what r2 cached would be. Uncached is more complex since no region control.

They both serve very different purposes though, KV is eventually consistent, infrequent updates, lots of writes, R2 is strongly consistent, more mixed usage

SSpunkie How does CF cname flattening work with CF proxying and workers? If I flatten a...

Chaika•10/31/24, 4:07 PM

Worker Custom Domains or Routes?

Chaika•10/31/24, 4:07 PM

well -- you can't modify custom domains regardless afaik, and enabling flattening on proxied records wouldn't do anything

elpupper•10/31/24, 4:08 PM

40-50 :pepethink:

CChaika Worker Custom Domains or Routes?

SpunkieOP•10/31/24, 4:08 PM

ah ya.. I guess it would not work because a the cname would just get replaced by a cname for the worker

Eelpupper 40-50 :pepethink:

Chaika•10/31/24, 4:08 PM

I'm counting end to end from my perf monitoring, from the worker it's only going to be ~10ms or so I'd imagine

Chaika•10/31/24, 4:08 PM

err actually I think I have that data lol

CChaika I'm counting end to end from my perf monitoring, from the worker it's only going...

elpupper•10/31/24, 4:08 PM

10 ms :pepethink:

fry69•10/31/24, 4:09 PM

As far as I understand CNAME flattening only remove intermediary CNAME pointer records and the CF nameservers respond directly with A/AAAA records?

Chaika•10/31/24, 4:09 PM

yes which happens anyway when proxied

SpunkieOP•10/31/24, 4:10 PM

routes don't cause a cname to be applied, only custom domains ya?

CChaika err actually I think I have that data lol

elpupper•10/31/24, 4:10 PM

u would be an absolute life saver if u do

Eelpupper 10 ms :pepethink:

Chaika•10/31/24, 4:10 PM

r2 cached, timing in worker

CChaika r2 cached, timing in worker

elpupper•10/31/24, 4:11 PM

how big is your data?

elpupper•10/31/24, 4:11 PM

the file you requested

Chaika•10/31/24, 4:11 PM

10kb

elpupper•10/31/24, 4:11 PM

:pepethink:

Chaika•10/31/24, 4:11 PM

I don't think size is too much of a factor though, once you get it streaming -- it well streams back at pretty decent speeds

Chaika•10/31/24, 4:12 PM

r2 uncached from enam region to enam bucket

Chaika•10/31/24, 4:13 PM

KV's pretty solid

SSpunkie routes don't cause a cname to be applied, only custom domains ya?

SpunkieOP•10/31/24, 4:13 PM

@Chaika sorry I confused myself but to be clear, a CNAME that is proxied and flattened can or can not be intercepted by a worker with a route setup to catch something on that cname/subdomain?

SSpunkie @Chaika sorry I confused myself but to be clear, a CNAME that is proxied and fla...

Chaika•10/31/24, 4:13 PM

flattening shouldn't matter at all, not even sure why it shows up on proxied records currently

Chaika•10/31/24, 4:14 PM

Proxy inherently needs to unflatten it to connect, as the client sure can't

SSpunkie @Chaika sorry I confused myself but to be clear, a CNAME that is proxied and fla...

Chaika•10/31/24, 4:14 PM

So the answer is yes* as long as you're not CNAMEing to a CF for SaaS partner on the legacy integration like Shopify

CChaika KV's pretty solid

elpupper•10/31/24, 4:14 PM

beautiful

elpupper•10/31/24, 4:15 PM

might have to resort to KV

CChaika What you store in memory/global? no File system? They don't have any

elpupper•10/31/24, 4:17 PM

how long is it presistent for in memory

Eelpupper how long is it presistent for in memory

Chaika•10/31/24, 4:18 PM

as long as it's getting frequent requests but it's complex in reality

Chaika•10/31/24, 4:19 PM

Workers run on the same edge machine which handled your original request. There is no affinity to routing to a specific machine which already has your worker running. There is keepalive. Chance of two random connections hitting the same machine and thus getting the same worker is pretty low, espec when it can be any machine at any cf pop. However, keepalive can make it confusing since your browser would keep hitting the same

Chaika•10/31/24, 4:19 PM

If you're worried about cold starts, CF does a good job of that, taking advantage of the tls handshake to warm up the worker during initial connection, elimating cold starts unless you've got a big worker/a lot of code in global scope

Chaika•10/31/24, 4:20 PM

but def don't rely on global scope for anything

CChaika If you're worried about cold starts, CF does a good job of that, taking advantag...

elpupper•10/31/24, 4:20 PM

its not about coldstarts

elpupper•10/31/24, 4:20 PM

its more about i have templates that i need to serve

elpupper•10/31/24, 4:20 PM

static html, css

CChaika r2 uncached from enam region to enam bucket

ItsWendell•10/31/24, 4:27 PM

Where did you get these stats from?

IItsWendell Where did you get these stats from?

elpupper•10/31/24, 4:28 PM

its his own

CChaika err actually I think I have that data lol

elpupper•10/31/24, 4:28 PM

Chaika•10/31/24, 4:33 PM

If you're using KV and you want to measure it's real easy and nothing fancy, just performance.now() and writing to Cloudflare's Analytics Engine, ex:

        var startReq = performance.now();
        await env.KV.put(key, req.body, { // or get
    
        });
        var getDur = performance.now() - startReq;
        if (env.AE)
          env.AE.writeDataPoint({
              blobs: [],
              doubles: [getDur],
              indexes: [key]
            });
...

        var startReq = performance.now();
        await env.KV.put(key, req.body, { // or get
    
        });
        var getDur = performance.now() - startReq;
        if (env.AE)
          env.AE.writeDataPoint({
              blobs: [],
              doubles: [getDur],
              indexes: [key]
            });
...

Then you can use Grafana w/ AE and build nice dashboards relatively easily

CChaika If you're using KV and you want to measure it's real easy and nothing fancy, jus...

elpupper•10/31/24, 6:15 PM

quick question since you seem like you know the ins and outs. How would you go about serving static content? with wildcard domains

would you just store everything in a r2 bucket, then have a worker in the front responding with the proper files?

Eelpupper quick question since you seem like you know the ins and outs. How would you go a...

Chaika•10/31/24, 6:16 PM

wildcard domains being one of your domains, all subdomains, or as in you'd want to hook up customer domains?

CChaika wildcard domains being one of your domains, all subdomains, or as in you'd want ...

elpupper•10/31/24, 6:18 PM

both

elpupper•10/31/24, 6:19 PM

I thought i might get away with doing cd of CF pages

elpupper•10/31/24, 6:19 PM

But doesnt seem like i can

Chaika•10/31/24, 6:19 PM

with the same set of static assets for all, or would customers have different ones or something?

CChaika with the same set of static assets for all, or would customers have different on...

elpupper•10/31/24, 6:19 PM

Different

Chaika•10/31/24, 6:20 PM

For customer domains you need CF For SaaS on top, and you can't do wildcard with CF For SaaS without Enterprise

Chaika•10/31/24, 6:20 PM

you could go Workers Static Assets, pay nothing for requests like pages, and use wildcard routes for your own domain

Chaika•10/31/24, 6:21 PM

then you can use CF For SaaS easily with plain Workers

Chaika•10/31/24, 6:21 PM

if you need lots of customer assets though, well you can only have 500 workers even on paid, and there's limits on assets/would be messy to intermingle, you'd probably want to just throw their custom stuff into KV

Chaika•10/31/24, 6:22 PM

KV is 25 MiB max though, per key (just like Pages and Workers Assets)

var startReq = performance.now(); await env.KV.put(key, req.body, { // or get }); var getDur = performance.now() - startReq; if (env.AE) env.AE.writeDataPoint({ blobs: [], doubles: [getDur], indexes: [key] }); ...

How does CF cname flattening work with CF proxying and workers? If I flatten a cname will my worke

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