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 Bellsouth.net, it has a 5 minute 2nd retry. But AT&T
took them over, so lets see what att.net 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outdated.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
common.
hp
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_ | Peter J. Holzer | It took a genius to create [TeX],
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