Cloudflare Developers•6mo ago

Do you have them enabled under Settings -> Replication?

CChaika Do you have them enabled under Settings -> Replication?

Jumaron•7/1/25, 5:33 PM

Yes

JJumaron How many queries do i need until the read replicas kick in, i still have 0 :/ Us...

lambrospetrou•7/1/25, 5:36 PM

There isn't any query limit, once it boots in the region of your requests it should start processing read requests.

Llambrospetrou There isn't any query limit, once it boots in the region of your requests it sho...

Jumaron•7/1/25, 5:36 PM

hmm, I use sveltekit maybe its because of that?

Llambrospetrou There isn't any query limit, once it boots in the region of your requests it sho...

lambrospetrou•7/1/25, 5:36 PM

DM me your account and database IDs to see if there is anything specific to it?

Jumaron•7/1/25, 5:36 PM

Sure

JJumaron hmm, I use sveltekit maybe its because of that?

lambrospetrou•7/1/25, 5:36 PM

Hmm, no idea about sveltekit.

JJumaron hmm, I use sveltekit maybe its because of that?

James•7/1/25, 9:13 PM

doubt it has anything to do w sveltekit, i use it all day, no issues

JJames doubt it has anything to do w sveltekit, i use it all day, no issues

Jumaron•7/1/25, 9:15 PM

Yes issue was resolved

Most likely the disabling and enabling the Replica button again fixed it.

Original message was deleted

lambrospetrou•7/2/25, 7:27 AM

When you don't use sessions explicitly, every request is always sent with

first-primary

first-primary

. Those examples should be identical in practice, since the replicas forward writes to the primary.

If the queries were reversed though, and the

select

select

was the 2nd query happening, they would be different.

Original message was deleted

lambrospetrou•7/2/25, 1:52 PM

Nice to hear that. Let us know if you find any issue.

Ssaminmnkani @lambrospetrou

Hello, I’m Allie!•7/2/25, 6:06 PM

?pings

SuperHelpflare•7/2/25, 6:06 PM

Please do not ping community members for non-moderation reasons. Doing so will not solve your issue faster and will make people less likely to want to help you.

onlyanegg•7/2/25, 9:58 PM

So, please forgive me if I'm asking an RTFM sort of question -- I've researched quite a bit, but haven't found definitive answers, I'd be happy to be pointed at the right place to look. I'm just getting started with CloudFlare Workers / D1, and I'm wanting to make sure I fully understand the security models so that I don't accidentally expose my users to security holes. I have read that cloudflare workers are serverless, which sounds to me like my full codebase (assembled) will be getting delivered to the end-users browser. If this is the case, it introduces some interesting security problems with disassembly, but I think is manageable. What I'm unclear about though is -- where are secrets stored, and how to prevent an end-user from doing something nefarious like modifying the wasm to query a different users data, for example. I'm sure something must be in place -- I'm guessing it's not really fully serverless, but I haven't been able to find out what portions are delivered to the end user, and which are not. Any pointers to where I can learn this would be greatly appreciated. Apologies for the novel

Oonlyanegg So, please forgive me if I'm asking an RTFM sort of question -- I've researched ...

onlyanegg•7/2/25, 10:07 PM

TLDR: workers aren't serverless in the way I was thinking of them. There isn't a single server, but edge servers all over the world that execute the code. I'm replying to myself because after I typed that novel, I thought of some new ways to search, and ended up at this link: https://www.cloudflare.com/learning/serverless/what-is-serverless/ - which explains it pretty well

Oonlyanegg TLDR: workers aren't serverless in the way I was thinking of them. There isn't ...

ChaikaOP•7/2/25, 10:32 PM

lol yea it's kind of a confusing name for beginners, generally though when you see serverless anything it's just a way the provider is saying "You don't manage servers or server level issues/worries", generally platforms where you just worry about code, but there's still servers and datacenters behind the scenes

Isaac McFadyen•7/2/25, 11:08 PM

^ also note that there's something with a very similar name to Workers called "Service Workers" that are exactly what you described (code is delivered to browser and executed in browser), but they're something anyone can deploy/use and are different than Workers.

onlyanegg•7/2/25, 11:50 PM

Yeh thanks much for confirmation / clarification - I love the concept, am hoping to switch a fair bit of stuff off my own servers before too long

Jumaron•7/3/25, 11:56 AM

What is the limit of the amount of d1 databases you could increase it to? (Not the 50k, but highest limit possible by request)

dustiiin•7/3/25, 1:14 PM

Hey, how can i edit the table schema? I want to change a columns Default Value.
when i click edit table schema the only i can do is adding a new column?

Original message was deleted

dustiiin•7/3/25, 1:41 PM

Yeah it worked. But the Dashboard from D1 doesnt display it. With PRAGMA table_info('table_name'); it shows the updated default value.
Thanks to you

Gagan Suie•7/3/25, 8:23 PM

hi, how do i get a presigned url to download a file? is there a bucket.createSignedUrlbucket.createSignedUrl function?

GGagan Suie hi, how do i get a presigned url to download a file? is there a `bucket.createSi...

lambrospetrou•7/3/25, 9:29 PM

Did you mean to post this in the R2 channel?

Llambrospetrou Did you mean to post this in the R2 channel?

Gagan Suie•7/3/25, 11:19 PM

you right. sorrrryyyy

Angiewolf•7/4/25, 1:29 AM

Hi I have a little hobby website on a worker and a d1 database bound to that worker. My d1 db is only accessable after signing in to the admin user but now I see suspicious queries on my d1 and I have no idea how or what.

AAngiewolf Hi I have a little hobby website on a worker and a d1 database bound to that wor...

lambrospetrou•7/4/25, 6:19 AM

What are the suspicious queries? The 3rd one for example is probably just the listing done for the UI dashboard if I remember correctly. The counts are very low to be an abuse.

Llambrospetrou What are the suspicious queries? The 3rd one for example is probably just the li...

Angiewolf•7/4/25, 6:24 AM

Sorry, first time using d1 here. So most of these are just because I was in the d1 dashboard and it was gathering info?

Angiewolf•7/4/25, 6:25 AM

Thank you for the reply

AAngiewolf Sorry, first time using d1 here. So most of these are just because I was in the ...

lambrospetrou•7/4/25, 6:26 AM

The 1st and 3rd seem specific writes to your own tables, so I assume triggerred by you right?
The others yeah seem safe.

Angiewolf•7/4/25, 6:26 AM

1st is def me, 3rd not too sure haha

JJumaron What is the limit of the amount of d1 databases you could increase it to? (Not t...

gruntlord6•7/4/25, 8:20 PM

its a case by case basis so you won't get a public answer. If you need that many I would use durable objects instead because they don't have any hard limits in terms of amount of objects (just the amount of classes) https://developers.cloudflare.com/durable-objects/platform/limits/#how-many-durable-objects-can-i-create

Cloudflare Docs

Limits

Durable Objects are a special kind of Worker, so Workers Limits apply according to your Workers plan. In addition, Durable Objects have specific limits as listed in this page.

okHadi (parhlai.com)•7/6/25, 2:35 AM

Hey, need (any) opinion on my appraoch on developing an application on D1. I'm thinking to implement a microservices based architecture, so each logical business unit (e.g users, signups, blogs) will have their own database. This works well in my mind.

I still can't wrap my mind around the 10gb limitation on each database. Even with a microservice architecture, if I have to scale at some point, I will hit this limit with a single db. Of course cloudflare says that you can have many DBs, but how can I even make it work?

In my application, most of the data will be shared (you can think of it as a info website). So each user will almost always see the same data. So I can't do a "multi tenant" approach here.

Another option is sharding: but I'm new to DB design and still wrapping my head around it. So far, sharding doesn't fill the usercase.

This sounds more of an architecture question than a d1 question, but I'm happy to learn any advice, or any case studies that I can be pointed towards. Thanks : )

okHadi (parhlai.com)•7/6/25, 2:39 AM

follow up question: is sharding really a recommended architecture with D1?

OokHadi (parhlai.com)Hey, need (any) opinion on my appraoch on developing an application on D1. I'm t...

gruntlord6•7/6/25, 2:44 AM

You need to be more specific, what data is shared? What data isn’t shared? Why are you convinced you will hit the limit?

Ggruntlord6 You need to be more specific, what data is shared? What data isn’t shared? Why a...

okHadi (parhlai.com)•7/6/25, 2:48 AM

Well, each user can sign up, and let's say, they have a shared access to the same data, let's say blogs. The blogs can be of finance, education or any other category. For each category, I can create a database. Makes sense to me. But if I a category has so many blogs that it reaches the 10gb limit?

I'm not convinced I'll hit the limit honestly, but it is still an interesting question for me to ask. "In case" I do, what should I do to plan to scale?

OokHadi (parhlai.com)Well, each user can sign up, and let's say, they have a shared access to the sam...

gruntlord6•7/6/25, 2:52 AM

I’m not really sure I understand, why would each use have a shared blog database?

For example, I have an application with hundreds of thousands of e-commerce products that store owners can import, that needs to be shared so I use a single d1 instance . But all the other data the stores have is in tenant based durable objects, because they don’t need to be shared and don’t apply in other contexts.

okHadi (parhlai.com)•7/6/25, 2:54 AM

okay well yeah ecommerce app makes more sense lol, my bad

like in your case, there a hunderds of thousands of products, if you were to scale it to millions and hit the limit, what would be the approach?

I haven't looked much into durable objects yet, I guess that should be my next study

gruntlord6•7/6/25, 2:55 AM

Each product type is its own database

gruntlord6•7/6/25, 2:56 AM

If I needed two for a single type I would just have the client be updated to reflect that. One of them is about a gb now but I could also just optimize it more

gruntlord6•7/6/25, 2:56 AM

A 10gb database is a big database. There are legitimately large databases that need to be bigger but most are just unoptimized or not well architected

okHadi (parhlai.com)•7/6/25, 2:57 AM

I see

okHadi (parhlai.com)•7/6/25, 2:57 AM

yeah makes sense

gruntlord6•7/6/25, 2:58 AM

D1 is great for shared data but durable objects are a lot nicer for tenant based data since you don’t need to deploy each one, just the base class

Silvan•7/6/25, 6:44 PM

yea most of the time i use d1 for just auth and then DOs for tenants/micro services

Silvan•7/6/25, 6:45 PM

i should use cf access more ngl

Ashkan•7/7/25, 11:23 AM

hello guys, I can't find table tab in D1 database ? where was it moved?

AAshkan hello guys, I can't find table tab in D1 database ? where was it moved?

lambrospetrou•7/7/25, 12:10 PM

See "Explore data" button at the right side.

gruntlord6•7/7/25, 4:38 PM

you can also remove the "/metrics" from the url when you open it to see the old way

Llambrospetrou See "Explore data" button at the right side.

gruntlord6•7/7/25, 4:38 PM

could you make it a tab like it was before? I found the tab view a lot more intuitive since all the other parts of the page nav use it

Ggruntlord6 could you make it a tab like it was before? I found the tab view a lot more intu...

Brayden•7/7/25, 4:44 PM

It's a consideration we're making but makes for an awkward experience since clicking it doesn't necessarily follow the "tab" experience as you'd expect it to. And if we embedded the new Studio experience below we'd have a double sidebar situation which also makes for a weird UI behavior.

Do you have them enabled under Settings -> Replication?

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