虚拟机热迁移时,采用基于NAS的算法减少虚拟机热迁移时间

Preeti P. Thakre, V. Sahare
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引用次数: 1

摘要

实时迁移是在数据中心的虚拟化环境中使用的过程,目的是在系统维护期间实现零停机。但是在迁移实时虚拟机以及系统文件和存储数据的过程中,网络流量会随着网络带宽的增加而增加,迁移时间也会延迟。需要通过分析和优化存储开销来减少迁移时间,以保持系统性能。存储开销主要是由于在热迁移过程中传输不必要的重复数据而产生的。因此需要这样的存储设备,它将保留复制的数据驻留在源和目标物理主机,即NAS。提出的基于哈希映射的算法通过为NAS和RAM数据分配哈希值来映射所有I/O操作,以便跟踪重复的数据。只有唯一的数据才会被发送到目标主机,而不会影响服务水平协议(SLA),不会影响虚拟机迁移时间、应用程序停机时间、SLA违规、虚拟机迁移前和迁移后停机时间的开销。
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VM live migration time reduction using NAS based algorithm during VM live migration
Live migration is the process used in virtualization environment of datacenters in order to take the benefit of zero downtime during system maintenance. But during migrating live virtual machines along with system files and storage data, network traffic gets increases across network bandwidth and delays in migration time. There is need to reduce the migration time in order to maintain the system performance by analyzing and optimizing the storage overheads which mainly creates due to unnecessary duplicated data transferred during live migration. So there is need of such storage device which will keep the duplicated data residing in both the source as well as target physical host i.e. NAS. The proposed hash map based algorithm maps all I/O operations in order to track the duplicated data by assigning hash value to both NAS and RAM data. Only the unique data then will be sent data to the target host without affecting service level agreement (SLA), without affecting VM migration time, application downtime, SLA violations, VM pre-migration and downtime post migration overheads during pre and post migration of virtual machines.
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