6Ken Pepple. Deploying OpenStack[ M ]. 0' Reilly Media, Inc, USA, 2011:1-2.
7Jun Sun-Mi, Yu Dong-Hui, Kim Young-Ho, et al. A time synchronization method for NTP [ C ]/! Proceedings of the Sixth International Conference on Real-Time Computing Systems and Applications. 1999:466.
8Michael Fenn, Michael A Murphy, Sebastien Goasguen. A study of a KVM-based cluster for grid computing [ C ]// ACM Southeast Regional Conference. 2009 : 1-6.