As of March 2018, VSKP was the largest shed in terms of number of locomotives. At the end of March, 2018, VSKP DLS had 291 locomotives. New Katni Junction (NKJ) comes 2nd with 239 locomotives.
The following link is updated with diesel locomotive availability targets every month. These documents contain a detailed breakdown of locomotives being held at each DLS, locos transferred between sheds, locomotives scrapped or under repair etc -
click here