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From Navina Ramesh <>
Subject Re: question on yarn.container.cpu.cores
Date Mon, 16 Nov 2015 22:49:24 GMT
Hi Chen,
Samza container is still single threaded. In case of yarn based deployment,
Samza uses this config value to verify that the cluster has sufficient
capacity to support running your job.

Apart from this verification, I don't believe we utilize this config value.
If you set it to > 1, it won't have any effect on the Samza job execution
itself. However, you may end-up under-utilizing your Yarn cluster resources.


On Mon, Nov 16, 2015 at 2:32 PM, Chen Song <> wrote:

> According to the documentation, each Samza container is single threaded.
> Why giving yarn.container.cpu.cores as a config option and what is the
> implication
> to set this to a value > 1?
> --
> Chen Song

Navina R.

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