Amazon DynamoDB Accelerator (DAX) is not working

[ymwjbxxq]

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What is the problem?

Hello all,

I am trying to use DAX, and I have the following problems.

I try to connect in this way.

 let dax_endpoint = std::env::var("DAX_ENDPOINT").expect("DAX_ENDPOINT must be set");
 let dynamodb_dax_config = aws_sdk_dynamodb::config::Builder::from(&config)
      .endpoint_resolver(
          Endpoint::immutable(dax_endpoint.parse().unwrap()),
       )
      .build();

 let dynamodb_client = aws_sdk_dynamodb::Client::from_conf(dynamodb_dax_config);

Lambda Env Variables: DAX_ENDPOINT: DAX_DOMAIN:8111

I get this error:

thread 'main' panicked at 'scheme must be provided', /Users/xxx/.cargo/registry/src/github.com-1ecc6299db9ec823/aws-smithy-http-0.38.0/src/endpoint.rs:97:50

If I add the schema and I tried:

• dax://
• http://
• https://

I get time out:

INFO send_operation{operation="Query" service="dynamodb"}:provide_credentials{provider=default_chain}: aws_config::meta::credentials::chain: loaded credentials provider=Environment

error TimeoutError(RequestTimeoutError { kind: "API call (all attempts including retries)", duration: 5s })

I have tried this Node example: https://github.com/aws-samples/amazon-dax-lambda-nodejs-sample/blob/master/template.yaml

My Rust Lambda is in the same security group and subnets of the example run in Node.

If you need more, please let me know.

Dan

Version

v0.8.0

Platform

Lambda arm64

AWS Services

No response

Description

No response

Logs

No response

[rcoh]

DAX is actually a totally separate handwritten service / client. The client has not been written in Rust yet. See #208

[rcoh]

Actually, I'll leave this issue open as a feature request for future folks

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[constantincerdan]

Is a Rust DAX client being worked on at all @rcoh?

[jdisanti]

The DAX client isn't currently being worked on. We prioritize feature requests based on the number of thumbs up on them, so if you need this, be sure to add yours! I'll add the community note to the issue to make that clearer 😄

[aaronvg]

is DAX still pending development in Rust? I do see https://crates.io/crates/aws-sdk-dax

[jdisanti]

is DAX still pending development in Rust? I do see https://crates.io/crates/aws-sdk-dax

That crate is for calling the DAX control plane APIs: https://docs.aws.amazon.com/amazondynamodb/latest/APIReference/API_Operations_Amazon_DynamoDB_Accelerator__DAX_.html

There is currently no support for accelerated DynamoDB operations with DAX.

[stephenlb]

Hi! Keeping this thread alive, we are actively interested in native DAX Rust support 🚀

[constantincerdan]

Still very interested in native DAX support too. Now that the SDK has had its general release, are there plans to build a Rust DAX client?

[Velfi]

We plan to focus on bugfixes and developer experience (including compile times) this year. I don't expect we'll get to this.