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January 2000, Week 3

HP3000-L@RAVEN.UTC.EDU

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From:
Chris Bartram <[log in to unmask]>
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Date:
Wed, 19 Jan 2000 16:56:02 -0500
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 In <[log in to unmask]> [log in to unmask] writes:

> I notice as the program  loops through the files in the group that is
> takes a very long time to load for each file.   Running in a test
> Verbose (-v) mode it appears that the time is being spent in the
> OpenSocket phase.  Is there something I can do to speed up this
> process?  I do not have an understanding of what is happening with this
> program and would appreciate any information that someone can provide.

Opensocket is likely where name resolution is taking place. If you're using
DNS and your server is slow, that'll do it. If you're not, then the system
will try broadcasting (ARPing) to get the IP address for that system. Look
at your NMMGR settings for name resolution (you can set the order for which
it looks at hosts/nmmgr-dir, arp, etc). If you don't have DNS, then putting
the name/IP address in NMMGR's directory (and setting NMMGR to look there
first) will greatly speed things up.

It could also be that your mail server is slow in answering socket requests.
Some servers do reverse-DNS lookups on the host that's connecting to them;
if your mailserver is doing this and your DNS is slow, or you don't have
reverse DNS and it times out, this would also slow you down.

Finally, some mail servers also dynamically check online anti-spam services
when someone connects. Sometimes these lookups (which use DNS) take a while,
and response to initial connections are slowed. Note that this doesn't
affect throughput after things are connected however.

   -Chris (don't know telamon mail specifically, but am somewhat familiar
           with the related goings-on) Bartram

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