Through tunnels of automatic indexation to write data files?

Hello

I use neither-controller to control a servo and position and torque data collection. I want to write data to the TDMS files.

Recently, I learned about the design of producer/consumer model and I thought it would be a good approach to ensure that writing the files didn't slow down my timed loop of data collection.

However, I also realized that my program seems to work well if I wire the data that I collect the tunnels of automatic indexation. Can I use a structure that executes only after the entire collection of data is made to write the charts that I built to TDMS files.

Is there a reason that would make the last method against? Can the tunnels of idexing auto slow my loop enough to concern him? I collect only about 5,000 points of data for each channel.

See you soon,.

Kenny

In my opinion, the main consideration is timing.  If you use consumers/producers, you essentially make writing while the data collection process is "pending" the next item to collect.  It should be the case that the consumption will be faster than production, so at any time, 99% of the data are already written, Yes (perhish forbid!) if the program crashes, you already have most of the data on the disk. fo

Alternatively, you can use the tunnels and send an array of 5000 points (from the tunnel exit) for the writing process.  This requires it to be rather than parallel series - no writing occurs until all the 5000 points are generated, and the writing process, instead of is almost as soon as it starts, takes 5000 times longer (more or less).

The series is 'simpler', especially for a beginner.  The producer/consumer, if you understand the design model, would be my preference.

BS

Tags: NI Software

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