Hello,

Say I have 50 million features, each feature comes from disk.

At the beggining of my program, I handle each feature and depending on some conditions, I apply some modifications to some.

A this point in my program, I am reading a feature from disk, processing it, and writing it back, because well I don't have enough ram to open all 50 million features at once.

Now say I want to sort these 50 million features, is there any optimal algorithm to do this as I can't load everyone at the same time?

Like a partial sorting algorithm or something like that?