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https://issues.apache.org/jira/browse/KUDU-3158?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17145942#comment-17145942
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Grant Henke commented on KUDU-3158:
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I agree this needs to be documented so that it isn't viewed as a requirement
but as a consideration when picking hardware/resources. I also agree that more
concrete data to support it would be useful as well.
> Document recommendation to use a dedicated SSD for the WAL
> ----------------------------------------------------------
>
> Key: KUDU-3158
> URL: https://issues.apache.org/jira/browse/KUDU-3158
> Project: Kudu
> Issue Type: Improvement
> Components: documentation
> Reporter: Grant Henke
> Priority: Major
>
> It is a common deployment best practice to place the WAL on its own SSD to
> maximize ingest throughput in a Kudu cluster. However, we don't clearly
> document that recommendation in the places users would commonly look for it.
> It is mentioned somewhat in the FAQ:
> https://kudu.apache.org/faq.html#how-does-kudu-store-its-data-is-the-underlying-data-storage-readable-without-going-through-kudu
> But it should probably be mentioned in these places:
> https://kudu.apache.org/docs/installation.html#prerequisites_and_requirements
> https://kudu.apache.org/docs/configuration.html#directory_configuration
> https://kudu.apache.org/docs/scaling_guide.html
> Alternatively a hardware/deployment guide might be useful, but that is a
> larger undertaking.
>
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