[jira] [Created] (KUDU-3158) Document recommendation to use a dedicated SSD for the WAL

["Grant Henke (Jira)" <ji...@apache.org>]

Grant Henke created KUDU-3158:
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             Summary: 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


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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