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Cimbiosys: A Platform for content-based partial replication. NSDI
, 2009
"... People increasingly use multiple devices and Internet services to manage and share information. Since portable devices have limited resources for storage and bandwidth, it is essential to take advantage of proximity and selected replication of content. To this end we present Cimbiosys, a replication ..."
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Cited by 56 (15 self)
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People increasingly use multiple devices and Internet services to manage and share information. Since portable devices have limited resources for storage and bandwidth, it is essential to take advantage of proximity and selected replication of content. To this end we present Cimbiosys, a replication platform that permits each device to define its own content-based filtering criteria and to share updates with any other device. Cimbiosys ensures two properties not achieved by previous systems. First, every device stores exactly those items whose latest version meets arbitrary filter criteria that are independent of any hierarchical namespace. Second, every device represents its metadata in a compact form, with state proportional to the number of devices rather than the number of items. Such compact representation enables low synchronization overhead, which permits frequent synchronization even for bandwidthlimited devices. We have implemented Cimbiosys in C # and Mace. We evaluated the performance of the CIM Sync protocol in both simulation and using the Mace implementation. 1
Rhizoma: a runtime for self-deploying, self-managing overlays
"... Abstract. The trend towards cloud and utility computing infrastructures raises challenges not only for application development, but also for management: diverse resources, changing resource availability, and differing application requirements create a complex optimization problem. Most existing clou ..."
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Cited by 12 (2 self)
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Abstract. The trend towards cloud and utility computing infrastructures raises challenges not only for application development, but also for management: diverse resources, changing resource availability, and differing application requirements create a complex optimization problem. Most existing cloud applications are managed externally, and this separation can lead to increased response time to failures, and slower or less appropriate adaptation to resource availability and pricing changes. In this paper, we explore a different approach more akin to P2P systems: we closely couple a decentralized management runtime (“Rhizoma”) with the application itself. The application expresses its resource requirements to the runtime as a constrained optimization problem. Rhizoma then fuses multiple real-time sources of resource availability data, from which it decides to acquire or release resources (such as virtual machines), redeploying the system to continually maximize its utility. Using PlanetLab as a challenging “proving ground ” for cloud-based services, we present results showing Rhizoma’s performance, overhead, and efficiency versus existing approaches, as well the system’s ability to react to unexpected large-scale changes in resource availability. 1
NEPI: Using Independent Simulators, Emulators, and Testbeds for Easy Experimentation
"... Evaluating new network protocols, applications, and architectures uses many kinds of experimentation environments: simulators, emulators, testbeds, and sometimes, combinations of these. As the functionality and complexity of these tools increases, mastering and efficiently using each of them is beco ..."
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Cited by 8 (2 self)
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Evaluating new network protocols, applications, and architectures uses many kinds of experimentation environments: simulators, emulators, testbeds, and sometimes, combinations of these. As the functionality and complexity of these tools increases, mastering and efficiently using each of them is becoming increasingly difficult. In this paper, we consider how to make it easier to use multiple tools separately and together to improve the productivity of network researchers. We show how a single object model which encompasses every aspect of a typical experimentation workflow can be used to completely describe experiments to be run within very different experimentation environments. Although NEPI is still in early design and prototyping stage, we expect that its ability to describe and automate easily complex mixed experiments will enable further experimentation with heterogenous networks.
Dependable self-hosting distributed systems using constraints
"... We describe a technique for writing distributed applications which manage themselves over one or more utility computing infrastructures: by dynamically acquiring new computational resources, deploying themselves on these resources, and releasing others when no longer required. Unlike prior work, suc ..."
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Cited by 7 (3 self)
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We describe a technique for writing distributed applications which manage themselves over one or more utility computing infrastructures: by dynamically acquiring new computational resources, deploying themselves on these resources, and releasing others when no longer required. Unlike prior work, such management functionality is closely integrated with the application, allowing greater freedom in application-specific policies and faster response to failures and other changes in the environment without requiring any external management system. We address the programming complexity of this approach by applying constraint logic programming, and describe Rhizoma, an experimental runtime to explore these ideas. We present early experience of deploying
Understanding and Characterizing PlanetLab Resource Usage for Federated Network Testbeds
- In Proc. of the ACM SIGCOMM
, 2011
"... Global network testbeds are crucial for innovative network research. Built on the success of PlanetLab, the next generation of federated testbeds are under active development, but very little is known about resource usage in the shared infrastructures. In this paper, we conduct an extensive study of ..."
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Cited by 3 (0 self)
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Global network testbeds are crucial for innovative network research. Built on the success of PlanetLab, the next generation of federated testbeds are under active development, but very little is known about resource usage in the shared infrastructures. In this paper, we conduct an extensive study of the usage profiles in PlanetLab that we collected for six years by running CoMon, a PlanetLab monitoring service. We examine various aspects of node-level behavior as well as experiment-centric behavior, and describe their implications for resource management in the federated testbeds. Our main contributions are threefold: (1) Contrary to common belief, our measurements show there is no tragedy of the commons in PlanetLab, since most PlanetLab experiments exploit the system’s network reach more than just its hardware resources; (2) We examine resource allocation systems proposed for the federated testbeds, such as bartering and central banking schemes, and show that they would handle only a small percentage of the total usage in PlanetLab; and (3) Lastly, we identify factors that account for high resource contention or poor utilization in PlanetLab nodes. We analyze workload imbalance and problematic slices in Planet-Lab, and describe the implications of our measurements for improving overall utility of the testbed.
Distributed Application Configuration, Management, and Visualization with Plush
"... Support for distributed application management in large-scale networked environments remains in its early stages. Although a number of solutions exist for subtasks of application deployment, monitoring, and maintenance in distributed environments, few tools provide a unified framework for applicatio ..."
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Cited by 1 (0 self)
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Support for distributed application management in large-scale networked environments remains in its early stages. Although a number of solutions exist for subtasks of application deployment, monitoring, and maintenance in distributed environments, few tools provide a unified framework for application management. Many of the existing tools address the management needs of a single type of application or service that runs in a specific environment, and these tools are not adaptable enough to be used for other applications or platforms. To this end, we present the design and implementation of Plush, a fully configurable application management infrastructure designed to meet the general requirements of several different classes of distributed applications. Plush allows developers to specifically define the flow of control needed by their computations using application building blocks. Through an extensible resource management interface, Plush supports execution in a variety of environments, including both live deployment platforms and emulated clusters. Plush also uses relaxed synchronization primitives for improving fault tolerance and liveness in failure-prone environments. To gain an understanding of how Plush manages different classes of distributed applications, we take a closer look at specific applications and evaluate how Plush provides support for each.
GRENOBLE – RHÔNE-ALPES
"... Abstract: Performing experiments that involve a large amount of resources or a complex conguration, proves to be a hard task. We present Expo, which is a tool for conducting experiments on distributed platforms. First, the tool is described along with the concepts of resource and task sets, which ab ..."
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Abstract: Performing experiments that involve a large amount of resources or a complex conguration, proves to be a hard task. We present Expo, which is a tool for conducting experiments on distributed platforms. First, the tool is described along with the concepts of resource and task sets, which abstracts away some of the complexity in the manage of resources and software execution. Next, the tool is compared with other similar solutions based on some qualitative criteria, scalability and expressiveness tests as well as the feedback coming from using dedicated testbeds. The report nishes with the evaluation of Expo scalability and some uses cases in Grid'5000 and PlanetLab. Our experience showed that Expo is a promising tool to help the user with two primary concerns: how to perform a large scale experiment e ciently and easily, together with its reproducilibity.
IS
, 2012
"... HAL is a multi-disciplinary open access archive for the deposit and dissemination of sci-entific research documents, whether they are pub-lished or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L’archive ouverte p ..."
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HAL is a multi-disciplinary open access archive for the deposit and dissemination of sci-entific research documents, whether they are pub-lished or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L’archive ouverte pluridisciplinaire HAL, est destinée au dépôt et a ̀ la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d’enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.
Containers
, 2011
"... Any opinions, findings, and conclusions or reccommendations expressed in this material are those of the author(s) ..."
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Any opinions, findings, and conclusions or reccommendations expressed in this material are those of the author(s)
