Why d1 reads/writes are cheaper than kv's?

MMrinank Why d1 reads/writes are cheaper than kv's?

M

D1's read/writes only need to be replicated to a few dbs, and scale is limited (currently) to a single DO instance
while KV can handle millions of RPS and gets replicated globally

FFroggyKnight What's the disadvantage of using one db in D1 over one db per user? Is it just t...

M

Max (@rozenmd)•5/28/24, 6:01 AM

Managing the schema becomes annoying

FFroggyKnight Also what is the cost of a db after the 10 free db's?

M

Max (@rozenmd)•5/28/24, 6:02 AM

we don't charge per DB - only read/writes and storage https://developers.cloudflare.com/d1/platform/pricing/

MMax (@rozenmd)Managing the schema becomes annoying

F

FroggyKnight•5/28/24, 9:44 AM

Why is that?

FFroggyKnight Why is that?

M

Max (@rozenmd)•5/28/24, 10:35 AM

"migrations" currently are just us using the /query endpoint immediately and tracking the progress in your DB

doing that at scale doesn't really work, you don't want to wake up potentially millions of DBs, plus every migration might not succeed across the fleet

M

Max (@rozenmd)•5/28/24, 10:36 AM

so as part of dynamic bindings for D1 we're thinking about how to solve that too

I

imnotgoodatchoosingusernames•5/28/24, 10:56 AM

Is there any reason why the ability to export the entire database has been removed in more recent builds? I appreciate that the Time Travel feature allows 'rollbacks' but is there any intention of allowing full database downloads again in the future? There are a number of use cases this functionality is very useful for

Iimnotgoodatchoosingusernames Is there any reason why the ability to export the entire database has been remov...

M

Max (@rozenmd)•5/28/24, 10:56 AM

what do you mean?

M

Max (@rozenmd)•5/28/24, 10:57 AM

wrangler d1 export

wrangler d1 export

wrangler d1 export

wrangler d1 export hasn't been removed

M

Max (@rozenmd)•5/28/24, 11:00 AM

(there was a time where it didn't exist, but there were 3rd party options on github in the meanwhile)

I

imnotgoodatchoosingusernames•5/28/24, 11:00 AM

Clearly I had not read the docs recently enough. Thanks @Max (@rozenmd) !

MMax (@rozenmd)(there was a time where it didn't exist, but there were 3rd party options on git...

H

Hello, I’m Allie!•5/28/24, 11:01 AM

I forget, is there a documented API call for

export

export

?

HHello, I’m Allie!I forget, is there a documented API call for `export`?

M

Max (@rozenmd)•5/28/24, 11:02 AM

https://developers.cloudflare.com/workers/wrangler/commands/#export

Cloudflare Docs

Commands - Wrangler · Cloudflare Workers docs

Create, develop, and deploy your Cloudflare Workers with Wrangler commands.

MMax (@rozenmd)https://developers.cloudflare.com/workers/wrangler/commands/#export

H

Hello, I’m Allie!•5/28/24, 11:02 AM

Sorry, I meant on the HTTP API

M

Max (@rozenmd)•5/28/24, 11:03 AM

oh, no there isn't

MMax (@rozenmd)oh, no there isn't

H

Hello, I’m Allie!•5/28/24, 11:05 AM

Would D1 support a

wrangler d1 pull

wrangler d1 pull

wrangler d1 pull

wrangler d1 pull command, that

exports

exports

the DB into the correct place in the

.wrangler

.wrangler

.wrangler

.wrangler directory so you can use it locally? You can do that manually rn, but it isn't the most ergonomic thing to do

HHello, I’m Allie!Would D1 support a `wrangler d1 pull` command, that `exports` the DB into the co...

C

cosbgn•5/28/24, 11:14 AM

This would be fantastic, I'm currently doing a mix of export + execute but it's not ideal

HHello, I’m Allie!Would D1 support a `wrangler d1 pull` command, that `exports` the DB into the co...

M

Max (@rozenmd)•5/28/24, 11:23 AM

that'd be cool, but atm we don't have a means of pulling the sqlite file out

MMax (@rozenmd)that'd be cool, but atm we don't have a means of pulling the sqlite file out

H

Hello, I’m Allie!•5/28/24, 11:31 AM

It wouldn’t be ideal, but couldn’t you just run the commands against the DB manually?

MMax (@rozenmd)"migrations" currently are just us using the /query endpoint immediately and tra...

F

FroggyKnight•5/28/24, 11:37 AM

I see, so if I wanted to use a single D1 for my app (or maybe a DB per region). I wouldn't see any noticable performance issues in reads/writes?

M

Max (@rozenmd)•5/28/24, 11:39 AM

You'd be capped by DO's single instance limits until we release read replication

MMax (@rozenmd)You'd be capped by DO's single instance limits until we release read replication

F

FroggyKnight•5/28/24, 11:39 AM

What are those limits?

M

Max (@rozenmd)•5/28/24, 11:40 AM

Depends on how heavy your queries are, you're getting a single CPU thread and 128MB RAM - i've seen 1k requests per second go through

MMax (@rozenmd)Depends on how heavy your queries are, you're getting a single CPU thread and 12...

F

FroggyKnight•5/28/24, 11:42 AM

OK great ty, so my 10 user app will scale

F

FroggyKnight•5/28/24, 11:49 AM

So when read replicas release it will actually scale right?

FFroggyKnight So when read replicas release it will actually scale right?

M

Max (@rozenmd)•5/28/24, 12:22 PM

That's the idea - it'll also unlock forking/branching, and exports should get faster

G

gerbyzation•5/28/24, 12:57 PM

Heyhey! Are there any good ways to unit test code that relies on D1 w/o having to test it through the full worker request/response cycle? For example I have a service module that is passed a D1 database as an argument and I want to write unit tests for this?

GGyurmatag Is anybody having issue with time travel? Our instance is displaying this error:...

M

Max (@rozenmd)•5/28/24, 2:04 PM

This issue has been fixed

M

Max (@rozenmd)•5/28/24, 3:12 PM

https://developers.cloudflare.com/d1/build-with-d1/import-data/#known-limitations (i didn't know about this page)

M

Max (@rozenmd)•5/28/24, 3:14 PM

i wouldn't have expected it to output the error message into the dump, will raise an issue

M

MrinankOP•5/28/24, 5:07 PM

const memory = new BufferMemory({
    returnMessages: true,
    chatHistory: new CloudflareD1MessageHistory({
    tableName: 'stored_message',
        sessionId: 'example2',
    database: env.DB,
    }),
});

await memory.saveContext({ input: 'My name is TOMER' }, { output: 'Ok got it' });

const memory = new BufferMemory({
    returnMessages: true,
    chatHistory: new CloudflareD1MessageHistory({
    tableName: 'stored_message',
        sessionId: 'example2',
    database: env.DB,
    }),
});

await memory.saveContext({ input: 'My name is TOMER' }, { output: 'Ok got it' });

const memory = new BufferMemory({
    returnMessages: true,
    chatHistory: new CloudflareD1MessageHistory({
    tableName: 'stored_message',
        sessionId: 'example2',
    database: env.DB,
    }),
});

await memory.saveContext({ input: 'My name is TOMER' }, { output: 'Ok got it' });

const memory = new BufferMemory({
    returnMessages: true,
    chatHistory: new CloudflareD1MessageHistory({
    tableName: 'stored_message',
        sessionId: 'example2',
    database: env.DB,
    }),
});

await memory.saveContext({ input: 'My name is TOMER' }, { output: 'Ok got it' });

For some reason everything is working perfectly fine in langchain js but I cant see the changes/records in my D1 db dashboard. I am running this in localhost

MMrinank ```javascript const memory = new BufferMemory({ returnMessages: true, ch...

M

Matt Silverlock•5/28/24, 5:29 PM

Localhost is local only: it's not updating the remote (deployed/production) database that the dashboard is connected to.

MMatt Silverlock Localhost is local only: it's not updating the remote (deployed/production) data...

M

MrinankOP•5/28/24, 6:13 PM

Thanks for reminding, there is one -- remote flag in Wrangler :bibicat:

L

Laurent Pellegrino•5/28/24, 7:04 PM

Does D1 read replication is going to replicate in 1 datacenter per continent or all Cloudflare datacenters (i.e. 300+ cities)?

LLaurent Pellegrino Does D1 read replication is going to replicate in 1 datacenter per continent or ...

H

Hello, I’m Allie!•5/28/24, 7:05 PM

It's not going to be every datacenter, as not every datacenter supports Durable Objects at the moment. For the lower limit, I'm not sure

S

Sébastien Morel•5/29/24, 1:15 AM

same here

S

Sébastien Morel•5/29/24, 1:15 AM

dbs are down

S

Sébastien Morel•5/29/24, 1:15 AM

it must be @eminence I thought it was me who did something wrong, but yes 2/4 of my db are out

C

Chaika•5/29/24, 1:16 AM

are they actually down or is just the dash? All the DBs seem ok to me from workers

S

Sébastien Morel•5/29/24, 1:16 AM

I have D1 : internal error on the log from my workers

S

Sébastien Morel•5/29/24, 1:17 AM

it's pretty bad

S

Sébastien Morel•5/29/24, 1:18 AM

did you deploy recently @eminence ?

S

Sébastien Morel•5/29/24, 1:18 AM

it seems to be right after a deploy here (but I am not sure sure)

S

Sébastien Morel•5/29/24, 1:18 AM

ok I am just unlucky then

S

Sébastien Morel•5/29/24, 1:19 AM

{
  "result": null,
  "success": false,
  "errors": [
    {
      "code": 7500,
      "message": "Internal error: failed to get DB size and num_tables"
    }
  ],
  "messages": []
}

{
  "result": null,
  "success": false,
  "errors": [
    {
      "code": 7500,
      "message": "Internal error: failed to get DB size and num_tables"
    }
  ],
  "messages": []
}

{
  "result": null,
  "success": false,
  "errors": [
    {
      "code": 7500,
      "message": "Internal error: failed to get DB size and num_tables"
    }
  ],
  "messages": []
}

{
  "result": null,
  "success": false,
  "errors": [
    {
      "code": 7500,
      "message": "Internal error: failed to get DB size and num_tables"
    }
  ],
  "messages": []
}

Why d1 reads/writes are cheaper than kv's?

Similar Threads

Similar Threads

Similar Threads