Disk I/O Performance Isolation Among Xen Virtual Machines
Existing server virtualization technology can′t guarantee that virtual machines equally or proportionally share disk I/O bandwidth and can′t guarantee the I/O performance isolation among virtual machines.Based on the block IO process in Xen para-virtualization,this paper proposed a disk I/O performance isolation algorithm among Xen virtual machines-XIOS(Xen I/O Scheduler),which reschedules the bios of all virtual machines in general block layer,and guarantees latency requirement in I/O scheduler layer.Experiment results show that XIOS can efficiently and proportionally allocate disk I/O bandwidth for virtual machines.