1) in plot_exp2.py - hrs_wop, here wop stands for without pre-warm and hrs_wp stands for with prewarm
2)check what is in ALL-USAGE file and 3rd column of SHARE file
3)check how wss is estimated from cache->estimate_wss function
4)check what is in VDISK-OBJ.csv files


Trying a new dataset
1)Put the merged trace file in traces/[wload_name]/[wload_name]Merged.csv
2)In exp2.cc, change name of workload and rp->moment(if needed). No need to change any other configurations. 
3)In plot_exp2.py change workload name while passing from main. change begin time and end time in plots. change moment(of failure)
4)Set prewarming related parameters like prewarming at head etc in constructor of cache

Doubts
1)Pre-warm doesn't give much benefit on hit rate. This maybe because wss is low. But how to properly estimate wss. Current method
gives only relative estimate.
2)check if some problem due to large disk size in real1