Q: contineously writing to text file and deleting old data after fixed timer In Qt I'm writing continuously to text file, so my file size increasing but i want kept size limit so need to delete old data in text file.
I calculating file size in MB for every minute if file size is greater than 600MB I used QFile::resize(100); now file size is 100MB but data is older only , I wanted after resize data should be latest written to file.

A: Operating systems do not support cutting a file at the beginning. Most common solution for big log files is to close the file, rename it and create a new file.
