I have trained a RandomForestClassifier from Python Sckit Learn Module with very big dataset, but question is how can I possibly save this model and let other people apply it on their end. Thank you!
The recommended method is to use joblib, this will result in a much smaller file than a pickle:
from sklearn.externals import joblib
joblib.dump(clf, 'filename.pkl')
#then your colleagues can load it
clf = joblib.load('filename.pkl')
See the online docs