Improved Cloud resource allocation: how INDIGO-DataCloud is overcoming the current limitations in Cloud schedulers. - Álvaro López García; Lisa Zangrando; Massimo Sgaravatto; Vincent Llorens; Sara Vallero; Valentina Zaccolo; Stefano Bagnasco; Sonia Taneja; Stefano Dal Pra; Davide Salomoni; Giacinto Donvito (CoRR, 2017)