On Wed, Nov 2, 2016 at 10:40 AM, John Rushford <jjrushf...@gmail.com> wrote: > Miles, > > The weight is only used for round_robin = consistent_hash. It is ignored for > all other strategies. > In the consistent hash strategy, weight defaults to 1 and it’s a multiplier > to the number of replicas of > A parent inserted alon the hash ring.
Is there a reason why it was only applied to consistent hash? I think this is too complex to explain currently. > Round_robin=true returns a parent from an array where parent = client_ip_addr > % num_parents. I don't understand what that means. Does it effectively pin a parent to a particular Client IP? > Round_robin=strict is just a strict round roubin over the array of parents. > > Thanks > John Rushford > jrushf...@apache.org > > On 11/2/16, 10:21 AM, "Miles Libbey" <mlib...@apache.org> wrote: > > Hey folks- > > I'd like to update the parent.config documentation to include the > weightings feature -- there is an example that shows it, but no text > that describes it. So, I have some questions :) > > - I assume that if someone includes a weight for each parent, the > round robin=true turns into weighted round robin. I'd guess that ATS > will sum the weighted values of all the parents, then send each parent > (its value)/(sum of weights) of the traffic. True? In the example > (p1.x.com:8080|1.0; p2.y.com:8080|2.0), would p1 get 1/3 of the > traffic, and p2 would get the remaining 2/3rds? > > - In > https://docs.trafficserver.apache.org/en/latest/admin-guide/files/parent.config.en.html#examples > , there is an example that has a weighting, even though the selection > strategy is consistent hash. How does that work? Do the parents just > get added to the ring that percentage more time? Like in the example, > p1 gets added to the ring 1 time, and p2 gets added 2 times? > > - Does the weighting affect round_robin=strict and latched? > > - Is there a max value to the weighting? Anything special about the > decimal (for instance, is there a limit to the precision?) > > Also, what is the difference between round_robin=true and > round_robin=strict? > > thanks! > > miles > > > >
