[ntp:hackers] Asynch resolver

David L. Mills mills at udel.edu
Sun May 7 15:44:19 UTC 2006


Brian,

tinker minclock 4 minsane 4.

Dave

Brian Utterback wrote:

> Best three? Haven't we always maintained that we need four to reliably 
> detect false tickers?  Especially when we are dealing with a pool of 
> unknown quality servers, I would think it doubly important to have four.
>
>
> I presume that the actual number is configurable, but I think that if
>
> there is going to be a default, we really need it to be four.
>
>
> David L. Mills wrote:
>
>> Dany,
>>
>>
>> Simple. I would like the pool scheme to operate like manycast. If a 
>> server falls off the wagon or just gets old, the client should honk 
>> and expect a pool critter to come back. In fact, the pool management 
>> algorithms now are identical to manycast with the exception that the 
>> DNS resolution must come at startup. Once the best three truechimers 
>> have been found, the rest are tossed away. If one of the good guys is 
>> lost, there is no way to get it back. What I'd like to do is every 
>> couple of hours or so, honk for a fresh one and remitigate for the 
>> best three.
>>
>>
>> Dave
>>
>>
>> Danny Mayer wrote:
>>
>>
>>> Dave,
>>>
>>>
>>> We are of course supportive of these goals. We would also hope that it
>>>
>>> helps us in our other ongoing work and if the two can coincide so much
>>>
>>> the better, but we do understand if it doesn't.
>>>
>>>
>>> Can you explain what *you* mean by dynamic server discovery 
>>> methodology?
>>>
>>> I could interpret that in a number of different ways.
>>>
>>>
>>> Danny
>>>
>>>
>>> David L. Mills wrote:
>>>
>>>
>>>> Danny,
>>>>
>>>>
>>>> For my student this is an academic exercise. The first goal is to
>>>>
>>>> demonstrate dynamic server discovery methodology, second to use widely
>>>>
>>>> accessable tools, third to preserve portability. In that order, 
>>>> emphasis
>>>>
>>>> added. If the ISC library is well documented and has a moderate 
>>>> learning
>>>>
>>>> curve, that will be considered. So will competing methods. In 
>>>> short, as
>>>>
>>>> I have advised Sachim, the first goal above is the most important and
>>>>
>>>> the quickest way to achieve that is the best.
>>>>
>>>>
>>>> Dave
>>>>
>>>>
>>
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>>
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>>
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>>
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>>



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