"I managed to find a solution to this. I create a ram filesystem (tmpfs) and dump fixed length files there with gnuradio. I then move the files when they are complete to a persistent drive using another script. I don't know why I didn't think of this before.
juha"
Can you elaborate on this please? What do you mean by "dump fixed length files there with gnuradio"? Do you mean you use a file sink (connected to a RAM disk) with a set number of samples?