CAJ | 학술논문

依托基于内核的虚拟机（kernel-based virtual machine ， KVM ）的平台，针对虚拟机容错系统中的关键技术---虚拟锁步技术展开研究，主要研究虚拟锁步技术所采用的虚拟机同步机制（VM synchronization mechanism ）。对开源虚拟机容错软件Kemari进行架构剖析与代码分析，指出其所使用的基于数据拷贝的虚拟机同步机制在不使用共享存储进行锁步运行时，具有一定性能缺陷；以此为基础，提出相应的改进措施，设计并实现一种新的虚拟机同步机制。该机制采用事件重放的方式实现冗余虚拟机间块设备数据的同步，弥补了Kemari虚拟机同步机制的相关性能缺陷。
의탁기우내핵적허의궤（kernel-based virtual machine ， KVM ）적평태，침대허의궤용착계통중적관건기술---허의쇄보기술전개연구，주요연구허의쇄보기술소채용적허의궤동보궤제（VM synchronization mechanism ）。대개원허의궤용착연건Kemari진행가구부석여대마분석，지출기소사용적기우수거고패적허의궤동보궤제재불사용공향존저진행쇄보운행시，구유일정성능결함；이차위기출，제출상응적개진조시，설계병실현일충신적허의궤동보궤제。해궤제채용사건중방적방식실현용여허의궤간괴설비수거적동보，미보료Kemari허의궤동보궤제적상관성능결함。
The virtual lockstep technologies ,especially the virtual machine synchronization mechanism were studied relying on the popular virtual machine platform KVM .First ,the fault-tolerant software architecture and project based on the KVM virtual machine platform Kemari was analyzed .Then ,the problem was pointed out that due to the use of virtual machines synchroniza-tion mechanism based on the data copy ,Kemari’s virtual lockstep technology had certain performance deficiencies when it ran without the use of the shared storage .And a new VM synchronization mechanism named Forever based on improvements of the Kemari VM synchronization mechanism was proposed .The new VM synchronization mechanism combined two kinds of data syn-chronization methods .When virtual machine fault-tolerant system runs without the shared storage ,Forever realizes redundant block device data synchronization in the way of event replaying .At last ,the implementation details of new VM synchronization mechanism were introduced .