Why it takes so long to open a connection to a shared variable, the first time?
Hello
I have an application to large scale developed with LabVIEW DSC, which covers multiple computers on a LAN. In one of the VI I open variable connection shared by using the "open Datasocket' VI. I notice that after restarting my computer and execution of this VI into the source code (I have not tried with an executable file yet) it takes about 20 seconds to get a successful connection to a variable share located on another computer. The later 'Datasocket Open' claims the same computer to the same shared variable takes much less time, about 100 ms. I reproduce this with 3 different computer, so the behavior seems to be reproducible, but it's not to do it every time but very often. This scenario may occur also when I did not open a connection to another computer for awhile.
Anyone have this experience? Is there something I can do all this to avoid this 20 seconds delay problem? Anyone have an explanation?
All of my computers running Windows 8.1. I'm using LabVIEW 2012. All my firewalls are 'off '.
Thank you
Michel
Here is a picture of my open VI.
Recently, I did this for another client. You can emulate a timeout (and actually connect faster) by using the function "open in background" and then checking the variable.connected? property.
Tags: NI Software
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