Save million datas in one sec

Question

Hi guys, I've tried to search, but I didnt find the answer, thats why I'm posting this.
How many points/samples that can be saved in 1 sec with Labview (max)? It depends on my PC specs? I've searched in this forum and found this old thread http://forums.ni.com/t5/LabVIEW/Extremely-large-files/m-p/730139. With that program from (Herr) Altenbach, I've tried to save the datas in a .txt file using this Save1Data.vi and Signalsub.vi. The problem comes, when I'm trying to save like 100.000 points. Is there any hints to save that much samples, I need like to save about 1 million samples in 1 sec?
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Attachments:
save.png ‏25 KB
Save 1Data.vi ‏25 KB
Signalsub.vi ‏17 KB

Answer 1

Yamaeda wrote:
That's not quite what i meant.
You should open and close the file, just not every second.
Assuming you have a loop that measures 1m samples and then write the result to file, you should open and close the file outside this loop, and just overwrite/append inside the loop (in this case in a sub-vi).
You're writing the result as text, which'll be a little bigger and will also require a transform of the data, you could write a binary file. However, it shouldn't be a real issue in this case.
I'm pretty confident the main culprit is the opening/closing time of the file.
/Y 
I thought I need to put the open file and close file in the loop cause I need to store the data while I'm in TRUE case (I mean, actually Im not going to save all the datas all the time, but just at the time I'm clicking the TRUE button for the real program). But I think I'll try to take out the open/close file thing from the loop and see how it works for me.