I'm trying to accomplish having varnish always return a cached object by
having a large grace period, and have set:
in sub vcl_recv
set req.grace = 600m;
and
sub vcl_fetch {
set obj.grace = 600m;
if (obj.ttl < 600s) {
set obj.ttl = 600s;
}
}
Grace just doesn't seem to work when the backend is down... within the ttl,
the object gets returned when the backend is down, but as soon as the ttl is
over it, it gives me a 503 Service unavailable, even though the grace is of
10hours.
Is there a way to server objects out of grace when the backend is down?
-Javier
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