It depends. If you have one customer who need it once a week, you add this find-grep-awk script to xinetd and set the PHP page with the couple of fields settin

It depends. If you have one customer who need it once a week, you add this find-grep-awk script to xinetd and set the PHP page with the couple of fields setting the arguments for the request. If you have a million of customers per hour, you setup a bunch of terabyte-RAM servers with realtime Scala pipeline, and hire a team to tweak it day and night. Because that's a two very different problems. And the worst thing to do is to try to solve the problem X with a tools for problem Y.