simonch

Thank you. I think fig.1 show what you mean. I'm not sure if the fig.2 is same as the fig.1. If they are same,then in fig.2, when N is 50M,still has the promble. So, i doubt fig.1 has the same promble, because the 2D array will be in the memory.Later i will try to run the program on my NI instruments. In fig.3, N is 100M, there is no problem. I'm a beginner, and i think my question is very easy for some gurus. Thanks for your patience to answer my questions. Thank you, all. Thank you, igcode. fig.1 fig.2 fig.3

I found some examples with respect to the comment,but i still don't understand how to implement my use. Some people said using Queue Operations to implement it. acquire_lrge_binary.zip Managing Large Data Sets in LabVIEW.zip

thank you, igcode, Ton. i made a mistake about the size of data.it shoud be 20M points rather than 20MB. i do not need the entire array in memory,i jist want to save the data to the disk. igcode give a very good solution, thank you very much.Now, i use the NI pxi-5122 to acquire datas and save them to disk.there are two channels.the sample rate is 20MHz,and acquire 20M points,even more. in this case,how to save the datas to disk? daq and save.vi

I want to save the datas more than 20M Bytes. But when run the program,there is a dialog box showing as Not enough memory to complete this operation. The memory size of my pc is 2G. So,how to save large datas? Thanks.The version of lv is 8.6 save large datas.vi