Disabling data cache isn't mentioned in the documentation

[mhnap]

#616 introduced disabling of data cache by setting --max-cache-size=0, but this behavior is not mentioned in the Caching configuration section of the documentation. Would be great to include this information also there and maybe even add more details (is metadata cache stored in the same --cache dir, is metadata cache size can be configured, or it's limited to some value, etc).

[jamesbornholt]

This is intentionally undocumented right now, I think, as we weren't sure how useful metadata caching would be on its own. If you have a use case for it we'd be super interested to hear more!

[mhnap]

Aha, got it. My goal was to perform benchmarks with enabled cache for different --max-cache-size and --metadata-ttl values, and observe how they affect Get/List/Head request numbers and total test time. To isolate and understand better test results, I used to set --max-cache-size or --metadata-ttl to zero. However, I don't have any use case for metadata caching on its own other than benchmarks for now. Still, I think it would be great to see more details in the documentation if possible.

[passaro]

Hi @mhnap. We just merged #855, which enables (and documents) metadata-only caching. Closing #752 and #768.