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Re: 2821bis consideration - New 2nd attempt Retry Strategy recommendation

2007-11-17 11:58:41
On 2007-11-17 07:13:02 -0500, Hector Santos wrote:
Also, from what I have seen, top ISPs are also well below 30 mins 2nd 
retry. In fact for, it has a 5 minute 2nd retry. But AT&T 
took them over, so lets see what servers are doing. ..... Yup, 
exactly 5 mins 2nd retry which is what I saw (<30 mins) by the majority 
 when I was looking at the time.

IMO, 30 minutes is really too high and IMO, it corresponds to the good 
old days of less reliable machines, more down systems, less reliable 
connections, slower bandwidths, less scaled systems, etc, etc. But not 
today. With high performance machines, multi-threading software, Virtual 
Machines, higher bandwidths, better scaling, more challenge/response 
systems, etc, may suggest the x821 30 minute retry "guideline" is 
outdated.  :-)

I would agree with that. Temporary error conditions (real or simulated)
which are fixed in far less than 30 minutes are rather frequent these
days, and combining a short initial delay of a few minutes with an
exponential backoff to an upper limit of a few hours seems to be rather


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