What are some resources for making a TDMS data viewer for large (> 500Mb) files?

[DZula]

Hello!

I have NI Developer, and would like to create a standalone, executable VI for other engineers to browse through TDMS files.  We are using NI Compact DAQ to collect data for long term tests on electropneumatic valves (pressures, temps, voltages, currents, etc).  The data is being saved as TDMS files, but we need a good way to "browse" the data.  I am trying to use the "TDMS file viewer" VI already available in LabView, but it loads the entire file when opened.  This is problematic for large data files.  Can the TDMS files be "parsed" or loaded in pieces as the user "zooms in" or "scrolls" through them?  What are good ways to approach this?

Any help is greatly appreciated!  Thank you! 

Yours,
Dan

[MikeS81]

Hi Dan,

do you need to write it in LabVIEW. There is already a tool which can load TDMS files, it's called Diadem.

Mike

[TCPlomp]

You can easily adjust the TDMS viewer to your needs.

A TDMS file can be random accessed. The biggest problem will be hiding all the processing time from the user.

If you want to plot a whole stream of 500 Mb, you should downsample the data to just make it fit on your screen.

DIADem is quite good on the other hand.

Ton

[DZula]

Dear Mr. Mike,

A month ago, I would have sprung for Diadem, but recent budget crunches will not allow for it today.  Thank you though.

[DZula]

Dear Ton,

How would I access the TDMS files in portions?