General Purpose Process Migration

PI：Partha Dasgupta进程迁移问题受到了很多关注，但结果喜忧参半。传统上，迁移机制被用来平衡分布式系统中处理器之间的负载。然而，到目前为止为通用应用程序提出的大多数机制都需要对操作系统内核进行广泛的修改。因此，传统观点认为，流程迁移的成本与由此带来的好处并不相称。这项研究对进程迁移有了新的看法，既认识到它对越来越多的新兴应用程序的适用性，可以容忍更高的管理费用，也认识到使用新的用户级技术实现必要机制的可能性。ProcessMigration支持多种功能，如移动性、协作性、分布式系统管理、自动创建可配置性和容错。此外，API拦截技术允许在应用程序与底层操作系统交互的执行路径中插入任意功能，使进程迁移无需修改内核即可实现。这项研究调查了一种将应用程序与操作系统和物理环境中的依赖项分离的虚拟化方案。虚拟化还可以监视和控制进程和操作系统之间的交互以及由此产生的副作用，从而使进程迁移成为可能。

PI: Partha DasguptaThe process migration problem has received a lot of attention but hasproduced only mixed results. Traditionally, migration mechanisms havebeen used to balance the load among processors in a distributedsystem. However, most mechanisms proposed to date for general-purposeapplications have required extensive operating system kernelmodifications. Hence, conventional wisdom has held that the costs ofprocess migration are not justified by resulting benefits. Thisresearch takes a new look at process migration, recognizing both itsutility for an increasing number of emerging applications that cantolerate higher overheads, as well as the possibility of implementingnecessary mechanisms using novel user-level techniques. Processmigration enables a host of capabilities such as mobility,collaborative work, distributed systems management, automaticreconfigurability, and fault-tolerance. Moreover, API interceptiontechnologies, which permit insertion of arbitrary functionality in theexecution path of an application's interactions with the underlyingoperating system, enable process migration to be implemented withoutkernel modification. This research investigates a virtualizationscheme that decouples an application from dependencies in theoperating system and the physical environment. Virtualization alsomonitors and controls the interactions and the resulting side effectsbetween processes and operating systems, making process migrationpossible.