Clojure on AWS Lambda?

[Kyle Sexton]

Curious if anyone is doing anything on AWS Lambda now that it supports running Lambda functions in Java, https://aws.amazon.com/blogs/aws/aws-lambda-update-run-java-code-in-response-to-events/ ?


Kyle Sexton

[Jason Lewis]

I'm actually really curious about this as well, I've been wanting to experiment with AWS Lambda but the slow start-up of the Clojure runtime on the JVM has made me apprehensive... is there some mitigation of this on the Lambda service?

On Mon, Jun 15, 2015 at 4:07 PM Kyle Sexton <k...@mocker.org> wrote:

Curious if anyone is doing anything on AWS Lambda now that it supports running Lambda functions in Java, https://aws.amazon.com/blogs/aws/aws-lambda-update-run-java-code-in-response-to-events/ ?


Kyle Sexton

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[Karsten Schmidt]

Maybe Clojure itself isn't suitable, but Clojurescript w/ node as
target and lein-npm[1] should be okay (not tested)... Alternatively,
if you really need JVM features, you might be able to give Skummet[2]
a try (and please report back!)

[1] https://github.com/RyanMcG/lein-npm
[2] http://clojure-android.info/skummet/

--
Karsten Schmidt
http://postspectacular.com | http://thi.ng | http://toxiclibs.org

[Ragnar Dahlén]

I gave it a go:

https://github.com/uswitch/lambada

It's just a POC. Needed a Java shim to manage class loaders so the interface is not as nice I was hoping.

Might make it into library if there's interest.

[Kyle Sexton]

Nice work! Can you give any indication of what performance is like?


Kyle Sexton

[Kyle Sexton]

Answering my own question about performance, it looks like almost 14 seconds for the Lambda function to run. Doing the math¹ if I were to run this 3000000 times in a month bill would be about $342.56. Probably not the ideal solution for clojure in the cloud just yet. :)

START RequestId: 48614bcd-143b-11e5-b2c5-b704df8ab2eb
HELLO FROM CLOJURE :)
#object[lambdainternal.api.LambdaClientContext 0x26a7b76d lambdainternal.api.LambdaClientContext@26a7b76d]
END RequestId: 48614bcd-143b-11e5-b2c5-b704df8ab2eb
REPORT RequestId: 48614bcd-143b-11e5-b2c5-b704df8ab2eb	Duration: 13680.53 ms	Billed Duration: 13700 ms 	Memory Size: 512 MB	Max Memory Used: 104 MB

Kyle Sexton

Footnotes:

Footnotes:

¹

Used http://aws.amazon.com/lambda/pricing/ and came up with (* (* (* 13.7 3000000) (/ 512 1024.0)) 0.00001667) where 3000000 is number of times run per month, 13.7 is seconds of billable time, 512 is MB of RAM allocated to the function.

[Ragnar Dahlén]

You can get the initial startup time down by AOT compiling. I also believe that Lambda will re-use the same runtime and lambda function instance until a certain period of inactivity.

For example, in the example below I invoke the function (AOT compiled this time) three times. First invocation takes ~7s, the two following ~1.5ms.

START RequestId: b555c9c2-14c1-11e5-8a31-03153568534c

HELLO FROM CLOJURE :)

#object[lambdainternal.api.LambdaClientContext 0x3419866c lambdainternal.api.LambdaClientContext@3419866c]

END RequestId: b555c9c2-14c1-11e5-8a31-03153568534c

REPORT RequestId: b555c9c2-14c1-11e5-8a31-03153568534c Duration: 7882.62 ms Billed Duration: 7900 ms Memory Size: 512 MB Max Memory Used: 98 MB

START RequestId: bd876a51-14c1-11e5-94fc-f9606cb38b63

HELLO FROM CLOJURE :)

#object[lambdainternal.api.LambdaClientContext 0x63e31ee lambdainternal.api.LambdaClientContext@63e31ee]

END RequestId: bd876a51-14c1-11e5-94fc-f9606cb38b63

REPORT RequestId: bd876a51-14c1-11e5-94fc-f9606cb38b63 Duration: 1.66 ms Billed Duration: 100 ms Memory Size: 512 MB Max Memory Used: 98 MB

START RequestId: bdf4aa6f-14c1-11e5-a6b0-e9e3f6fa14c8

HELLO FROM CLOJURE :)

#object[lambdainternal.api.LambdaClientContext 0x68fb2c38 lambdainternal.api.LambdaClientContext@68fb2c38]

END RequestId: bdf4aa6f-14c1-11e5-a6b0-e9e3f6fa14c8

REPORT RequestId: bdf4aa6f-14c1-11e5-a6b0-e9e3f6fa14c8 Duration: 1.56 ms Billed Duration: 100 ms Memory Size: 512 MB Max Memory Used: 98 MB

[Moe Aboulkheir]

I looked into this a little over the weekend, and wrote a small library & lein template/plugin for deploying Clojurescript functions to Lambda: https://github.com/nervous-systems/cljs-lambda

There's a blog post / step-by-step tutorial here: https://nervous.io/clojure/clojurescript/aws/lambda/node/lein/2015/07/05/lambda/

Take care,

Moe

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