A concrete example for using data generator for large datasets such as ImageNet · Issue #1627 · keras-team/keras

I am already aware of some discussions on how to use Keras for very large datasets (>1,000,000 images) such as this and this. However, for my scenario, I can't figure out the appropriate way to use the ImageDataGenerator or write my own dataGenerator. Specifically, I have the following four questions: From this link: when we do datagen.fit(X_sample), do we assume that X_sample is a big enough chun