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

[LDM #OEP-635687]: question about primary and secondary data transfer

This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.

  • Subject: [LDM #OEP-635687]: question about primary and secondary data transfer
  • Date: Sat, 13 Jan 2018 10:50:56 -0700
Greg,

> "Let them switch" is a fantastic idea in a world where network traffic in the 
> same subnet is exactly the same cost as network traffic to a location 
> hundreds of miles away. I truly wish I lived in that world, it would make my 
> life so much easier.

I'm afraid we (my office and the LDM user's we're paid to support) live in that 
world. Sorry.

> I am not sure why it would prefer the remote site over the local site, which 
> should be faster with less latency.

Computers periodically run housekeeping routines. When that happens, latency 
can increase. There could also be transient congestion on your local network.

> I guess the tolerances are too tight for our purposes. It would be nice if it 
> was possible to tweak whatever threshold it is.

You could try modifying line 300 in file "protocol2/autoshift.c", then 
rebuilding and re-installing the LDM. Try the value 120 for two minutes (or 
whatever you want) and let me know it that helps. If it does, then I can add it 
to the LDM to-do list.

Regards,
Steve Emmerson

Ticket Details
===================
Ticket ID: OEP-635687
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.