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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