Need a sheel script to compare no of file on diffrent servers

i have serverA and serverB and i have a folder with same name an location in both servers.... Now i want to compare files in folder(serverA) with folder (serverB) if there are files missing in folderB then copy those files from folder(serverA) to folder(serverB)

rdist
rsync
nfs mount and diff or cmp
import listings to a spreadsheet and run compares
etc......