Transcription of Xen and the Art of Virtualization - University of Cambridge
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Xen and the Art of Virtualization - University of Cambridge
XenandtheArt ofVirtualizationPaulBarham , Boris Dragovic, KeirFraser, StevenHand,TimHarris,Alex Ho, RolfNeugebauery, IanPratt,Andrew War eldUniversityof CambridgeComputerLaboratory15 JJThomsonAvenue, Cambridge , UK,CB30 FDf beendesignedwhichusevirtualizationtosubd ividetheampleresourcesofa moderncomputer. Somerequirespecializedhardware, offerresourceisolationorperformanceguara ntees;mostpro-videonlybest-effortprovisi oning, ,anx86virtualmachinemonitorwhichallowsmu ltiplecommodityoperatingsystemsto shareconventionalhardwareina safeandresourcemanagedfashion,butwithout sac-ri cingeitherperformanceorfunctionality. Thisisachievedbyprovidinganidealizedvirt ualmachineabstractiontowhichoper-atingsy stemssuchasLinux,BSDandWindowsXP, targetedathostingupto100virtualmachinein -stancessimultaneouslyona modernserver.
providing an idealized virtual machine abstraction to which oper-ating systems such as Linux, BSD and Windows XP, can be ported with minimal effort. Our design is targeted at hosting up to 100 virtual machine in-stances simultaneously on a modern server. The virtualization ap-proach taken by Xen is extremely efcient: we allow operating sys-
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