On 9/13/2013 2:14 AM, Marco Davids (Prive) wrote:
On 09/13/13 03:53, Larry Sheldon wrote:
On 9/12/2013 3:25 PM, Phil Fagan wrote:
Its a good point about the anycast; 99.999% should be expected. A small choice of attitude-reflecting language.
I expect 100.000%
I'll accept 99.999% or better.
It depends... define 'lost queries'. For example; is RRL included here or not (sometimes you want to deliberatly 'loose' queries).
I do not ever set any amount of failure as an objective. I usually have a specified tolerance for failure. If for some odd circumstance I wan to discard queries, that would involve knowing exactly what happened to them--not loosing them. -- Requiescas in pace o email Two identifying characteristics of System Administrators: Ex turpi causa non oritur actio Infallibility, and the ability to learn from their mistakes. (Adapted from Stephen Pinker)
Tolerance for failure; I like it. Eric - I'm interested in an accepted norm of loss of queries made to the cache tier. Yes, when I provide a 'service' to a client (don't really care about SLA) i'm interested in what the accepted norm or guidance is on % loss on queries -- because this drives my architecture, right? Marco - I think 'lost queries' in this instance is simply, wait for it.....the full UDP session. Yes yes, session is bad to say, but service request completed through middle-boxes are tracked as sessions. So thats what I'm looking for; what is the general consesus for reliability all other things equal. Sure, you have the factor of UDP, retry, path, etc. etc. etc.....but I think Larry hit the nail on the head - whats my clients[aggregate of] tolerance before Evil ensues. On Fri, Sep 13, 2013 at 8:00 AM, Larry Sheldon <LarrySheldon@cox.net> wrote:
On 9/13/2013 2:14 AM, Marco Davids (Prive) wrote:
On 09/13/13 03:53, Larry Sheldon wrote:
On 9/12/2013 3:25 PM, Phil Fagan wrote:
Its a good point about the anycast; 99.999% should be expected.
A small choice of attitude-reflecting language.
I expect 100.000%
I'll accept 99.999% or better.
It depends... define 'lost queries'. For example; is RRL included here or not (sometimes you want to deliberatly 'loose' queries).
I do not ever set any amount of failure as an objective. I usually have a specified tolerance for failure. If for some odd circumstance I wan to discard queries, that would involve knowing exactly what happened to them--not loosing them.
-- Requiescas in pace o email Two identifying characteristics of System Administrators: Ex turpi causa non oritur actio Infallibility, and the ability to learn from their mistakes. (Adapted from Stephen Pinker)
-- Phil Fagan Denver, CO 970-480-7618
participants (2)
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Larry Sheldon -
Phil Fagan