[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[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
===================
NOTE: All email exchanges with Unidata User Support are recorded in the Unidata 
inquiry tracking system and then made publicly available through the web.  If 
you do not want to have your interactions made available in this way, you must 
let us know in each email you send to us.