Re: [Fwd: Re: [Sks-devel] Alternative to round-robin (was Re: pool.sks-keyservers.net having trouble?)]

[Jeff Johnson]

On Apr 6, 2010, at 1:43 PM, David Shaw wrote:

> On Apr 5, 2010, at 5:01 PM, Kristian Fiskerstrand wrote:
> 
>> I also did some minor fiddeling around with the priorities. It still
>> only returns a limited amount of records (currently 10), but those with
>> a higher weight are always prioritized in the selection as well.
>> 
>> Feel free to come with input as to the number of records to show and
>> which servers should benefit from weighting up. Currently I set my own
>> keys.kfwebs.net to weight 15 and keyserver.gingerbear.net. to weight 30
>> for test purposes. The default for the rest is 20.
> 
> There are many ways to automate this if you wanted to.  One simple way to do 
> it would be to rank the servers on how fast they respond.  Faster servers 
> will thus be queried more, until such time as they are not fast, and then 
> they'd be queried less.  Slower servers would be queried less to allow them 
> to recover and become fast.  It's somewhat naive, but should match the 
> real-world performance better than the round-robin does.
> 

The "preference" algorithm is far easier to state than to
implement, mostly because whatever server _WAS_ fastest
is rather different than whatever server _IS_ fastest.

Otherwise: You are absolutely correct.

73 de Jeff