?url_ver=Z39.88-2004&rft_id=10.1109%2FCLOUD53861.2021.00061&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Tauchi%2C+S.&rft.aulast=Tauchi&rft.aufirst=S.&rft.issn=21596182&rft.isbn=9781665400602&rft.title=Optimizing+VMs+across+Multiple+Hosts+with+Transparent+and+Consistent+Tracking+of+Unused+Memory&rft.date=2021&rft.genre=proceeding