Live and incremental whole-system migration of virtual machines using block-bitmap
作者： Yingwei Luo , Binbin Zhang , Xiaolin Wang , Zhenlin Wang , Yifeng Sun
DOI: 10.1109/CLUSTR.2008.4663760
关键词: Computer science 、 Live migration 、 Virtual machine 、 Bitmap 、 Synchronization 、 Parallel computing 、 Data integrity 、 Data consistency 、 Disk storage 、 Operating system
摘要: In this paper, we describe a whole-system live migration scheme, which transfers the whole system run-time state, including CPU memory data, and local disk storage, of virtual machine (VM). To minimize downtime caused by migrating large storage data keep integrity consistency, propose three-phase (TPM) algorithm. facilitate back to initial source machine, use an incremental (IM) algorithm reduce amount be migrated. Block-bitmap is used track all write accesses during migration. Synchronization in performed according block-bitmap. Experiments show that our algorithms work well even when I/O-intensive workloads are running migrated VM. The around 100 milliseconds, close shared-storage Total time greatly reduced using IM. block-bitmap based synchronization mechanism simple effective. Performance overhead recording writes on VM very low.
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