[LDM #GUQ-669331]: Both Radar and Satellite feeds stopped downloading abruptly

John,

> I agree, RAM disk setup is probably not necessary as Rime is a stout physical 
> server that resides outside of the datacenter, while Mammatus is a virtual 
> inside the datacenter.
> 
> Learn, Internet2, my firewall folks, and my network folks all say it isn't in 
> their system.
> 
> That said, do you believe I may be right in my thinking when I say that our 
> 10Gbs link through Learn/Internet2 to you is perhaps the problem.  Here's why 
> I think it might.  My NOC says that it gets up to 6-7Gbs during the day which 
> is starting to get close to where you typically begin seeing some congesting 
> in a 10Gbs network.  Now, I read the following from one of your other support 
> requests from the past and it made me think that if LDM's TCP “plays nice,” 
> maybe it is backing off enough on a congested link to be an issue for the LDM 
> queue.

Can your NOC produce a time-series plot of bandwidth usage? If so, does it show 
increased traffic around 1800Z?

> The LDM uses TCP, which plays nice with others and automatically adjusts to 
> available bandwidth -- using less if the network is congested and more as the 
> network becomes uncongested.
> 
> What do you think?

I don't think it's the LDM.

Regards,
Steve Emmerson

Ticket Details
===================
Ticket ID: GUQ-669331
Department: Support LDM
Priority: Normal
Status: Closed
===================
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