| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 1433.1 | Does this make sense? | DUCAT2::64544::LICAUSE | Al Licause (338-5661) | Tue Sep 03 1991 11:46 | 20 |
| <<< RANGER::$2$DUA8:[NOTES$LIBRARY]PWDOS4.NOTE;1 >>>
-< PATHWORKS for DOS and VMS >-
================================================================================
Note 131.1 Can't communicate w/PATHWORKS V4.1 1 of 1
PHOTON::Lichtenberg "Mitch Lichtenberg" 6 lines 3-SEP-1991 10:27
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It almost sounds like that the MCC programs are trying to make TWO nice
connections to the target node at once. That probably doesn't work.
/Mitch.
MCC folks....does this make sense.
Hope we don't get into a shouting contest!
Al
|
| 1433.2 | Yep, 2 links (sortof).... | TOOK::CAREY | | Thu Sep 05 1991 12:21 | 35 |
|
.1 -- you're right on, we are trying to form a second link.
We've been working with the Pathworks folks to iron out the details,
but here's a quick look at what goes on:
o We form a link.
o We try to form a second link to find out if the agent can manage
multiple concurrent links. If so, we note that. If not, we note
that and continue on.
o We make our request. If its a complex request, and it's possible, we
run multiple concurrent links to the remote agent in hopes of
speeding up the response. For big requests this is a big win; for
other requests we're not as sure. If the remote agent can't handle
multiple links, we failover to a sequential approach similar to NCP.
It requires more patience, but works.
With previous DECnet/DOS incantations, this algorithm worked fine.
Doesn't work with 4.1. Early indications are that the Pathworks agent
is getting into some context trouble when we try the second link and it
doesn't work. At least, we've been working with the Pathworks folks on
this one, and they've decided to look at that side first.
What we've seen is our first link succeeds, our second link fails so we
failover into single link mode. Since we have a link up, our original
request usually succeeds (depending on the request), but subsequent
connection attempts from MCC or NCP fail until the agent is restarted.
More news as it evolves.
-Jim Carey
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| 1433.3 | FYI -- Pathworks folks found problem | TOOK::CAREY | | Wed Sep 25 1991 20:06 | 11 |
|
Just a quick followup:
We worked with the Pathworks folks, and after some quick conferences
uncovered some problems in the new Pathworks agent. I don't have all
the details, but there was definitely a context problem in their agent.
The latest word I've gotten is that the problem has been addressed.
-Jim Carey
|
| 1433.4 | Update on fix?? | OTOOA::DOIRON | [email protected] | Tue Nov 12 1991 16:56 | 14 |
| Jim,
Could you elaborate on "has been addressed" a little? Is there a patch
available for pathworks and/or mcc?
To be able to register pathworks v4.1 nodes as node4 entities is
important when we talk to customer's who have large installed pathworks
networks in the government space.
It seems more and more situations we are asked to look at require the
management of large bodies of ps's of some variety.
Thanks,
Richard
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| 1433.5 | Pathworks fixing it for their SSB. | TOOK::CAREY | | Tue Nov 19 1991 14:47 | 30 |
|
Richard,
I have forwarded your request for elaboration over to the Pathworks
folks. I don't know if a patch was created, or on what date a fix was
introduced into the Pathworks field test.
My last discussion with the Pathworks folks was in early October, and
(like the engineer I am) in inquired whether the problem was understood
and resolved and the answer was yes.
There won't be any MCC patch. The PC agent was badly losing context
after anyone tried multiple connects (even though it doesn't honor
them, it needs to drop them cleanly) and the Pathworks folks attacked
it with a vengeance.
Oops, while I was typing this up I just got an update from Pathworks:
"Yep, we encountered that problem during our field test.
Yep, we understand it and have ensured that it will be fixed
for our release kit."
I'll send out some feelers about more details, but I don't have any
right now.
Hope this helps some.
-Jim Carey
|