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We have created Zap, a novel system for transparent migration of legacy and networked applications. Zap provides a thin virtualization layer on top of the operating system that introduces pods, which are groups of processes that are provided a consistent, virtualized view of the system. This decouples processes in pods from dependencies to the host(More)
This paper presents VMFlockMS, a migration service optimized for cross-datacenter transfer and instantiation of groups of virtual machine (VM) images that comprise an application-level solution (e.g., a three-tier web application). We dub these groups of related VM images VMFlocks. VMFlockMS employs two main techniques: first, data deduplication within the(More)
We present a new distributed checkpoint-restart mechanism, Cruz, that works without requiring application, library, or base kernel modifications. This mechanism provides comprehensive support for checkpointing and restoring application state, both at user level and within the OS. Our implementation builds on Zap, a process migration mechanism, implemented(More)
Traditional application programming interfaces for transport protocols make a virtue of hiding most internal per-connection state. We argue that this information-hiding precludes many potentially useful application features and performance optimizations. We advocate a disciplined, portable, and secure interface that gives applications both "get" and "set"(More)
MapReduce has emerged as a prevailing distributed computation paradigm for enterprise and large-scale data-intensive computing. The model is also increasingly used in the massively-parallel cloud environment, where MapReduce jobs are run on a set of virtual machines (VMs) on pay-as-needed basis. However, MapReduce jobs suffer from performance degradation(More)
Software bugs that occur in production are often difficult to reproduce in the lab due to subtle differences in the application environment and nondeterminism. To address this problem, we present Transplay, a system that captures production software bugs into small per-bug recordings which are used to reproduce the bugs on a completely different operating(More)
Record and replay (RR) is a software based state replication solution designed to support recording and subsequent replay of the execution of unmodified applications running on multiprocessor systems for fault-tolerance. Multiple instances of the application are simultaneously executed in separate virtualized environments called containers. Containers(More)
Existing applications often contain security holes that are not patched until after the system has already been compromised. Even when software updates are applied to address security issues, they often result in system services being unavailable for some time. To address these system security and availability issues, we have developed peas and pods. A pea(More)