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[LDM #YPJ-917456]: Slow LDM delivery problem

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  • Subject: [LDM #YPJ-917456]: Slow LDM delivery problem
  • Date: Wed, 07 Apr 2010 16:11:30 -0600
Hi Brice,

re:
> No, this one is different.  We finally traced that problem to an issue
> with one of the internal network switches.  Somehow the port that faced the
> firewall had its configuration changed to where it was giving 100Mbps
> outbound, but less than 10 inbound.  How/why, don't know, but we got that
> fixed.

Wow!  Excellent sleuthing!!

re:
> But I got new information today.  I don’t think it’s a problem with LDM
> at all now.  Other than the LDM on our main interface ‘server’ is running
> a lot of data through it.  What SMG had told me was that the transfers of
> the GRIB2 data, fairly large files, were not getting through but very
> slowly.  However, when we attempted to push a 13MB file to the LDAD
> yesterday, SCP could not come up any higher than 40KBps.  Contrasted to
> pushing the entire ldm.pq (1.9GB) to our offsite development workstation
> and getting 9.2MBps transfer rate out of the same 100Mps choke point, i.e.
> the common firewall and router between the systems.
> 
> So I think SMG is barking up the wrong tree and I have told them so.

Very good.

re:
> My apologies for running you guys up the tree.

No worries.  We are happy to hear that the problem's resolution is within
reach (hopefully).

re:
> I’ll let you know if we can
> ever get an answer (preferably by having their network guys work directly
> with our network guys… at the same time even).

Excellent, thanks!

Cheers,

Tom
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Ticket Details
===================
Ticket ID: YPJ-917456
Department: Support LDM
Priority: Normal
Status: Closed