using $upstream* variables inside map directive

Francis Daly francis at
Thu Nov 12 14:34:55 UTC 2020

On Thu, Nov 12, 2020 at 04:58:31AM -0500, unoobee wrote:

Hi there,

> My configuration looks like this:

Thanks for this.

It looks like you are setting "proxy_cache" to always try to read from
"hdd_cache"; but you want it to sometimes write to "ssd_cache" instead.

And you are reporting that it does not ever write to "ssd_cache".

Is that correct?

If so -- given that it will only ever read from "hdd_cache", what would
be the benefit in writing to somewhere else?

I'm not certain what you're trying to achieve. Perhaps describing that,
might make it clear whether it can be done?

Francis Daly        francis at

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