On 8/9/21 14:49, Geoff Simmons wrote:
> 
> A hash algorithm computes a number h(b) for a backend b, ...

Sorry, this should have been more like h(bereq), meaning that the number
is computed from features of the request. From that you get to the
choice of a backend.

The Varnish hash director uses the same hash value that was computed for
caching.

The shard director also does that by default, but some other choices can
be set with the parameter by in shard.backend(): by=HASH (default),
by=URL, by=KEY, by=BLOB


Geoff
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