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63
Coyote: A System for Constructing Fine-Grain Configurable Communication Services
- ACM TRANSACTIONS ON COMPUTER SYSTEMS
, 1998
"... Communication-oriented abstractions such as atomic multicast, group RPC, and protocols for location-independent mobile computing can simplify the development of complex applications built on distributed systems. This paper describes Coyote, a system that supports the construction of highly modular ..."
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Cited by 107 (15 self)
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Communication-oriented abstractions such as atomic multicast, group RPC, and protocols for location-independent mobile computing can simplify the development of complex applications built on distributed systems. This paper describes Coyote, a system that supports the construction of highly modular and configurable versions of such abstractions. Coyote extends the notion of protocol objects and hierarchical composition found in existing systems with support for finer-grain objects called micro-protocols that implement individual semantic properties of the target service. A customized service is constructed by selecting micro-protocols based on their semantic guarantees and configuring them together with a standard runtime system to form a composite protocol implementing the service. Micro-protocols within a composite protocol can share data and are executed using an event-driven paradigm that enhances configurability. The overall approach is described and illustrated with exampl...
ASHs: Application-Specific Handlers for High-Performance Messaging
- IN ACM COMMUNICATION ARCHITECTURES, PROTOCOLS, AND APPLICATIONS (SIGCOMM ’96
, 1996
"... Application-specific safe message handlers (ASHs) are designed to provide applications with hardware-level network performance. ASHs are user-written code fragments that safely and efficiently execute in the kernel in response to message arrival. ASHs can direct message transfers (thereby eliminatin ..."
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Cited by 59 (12 self)
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Application-specific safe message handlers (ASHs) are designed to provide applications with hardware-level network performance. ASHs are user-written code fragments that safely and efficiently execute in the kernel in response to message arrival. ASHs can direct message transfers (thereby eliminating copies) and send messages (thereby reducing send-response latency). In addition, the ASH system provides support for dynamic integrated layer processing (thereby eliminating duplicate message traversals) and dynamic protocol composition (thereby supporting modularity). ASHs provide this high degree of flexibility while still providing network performance as good as, or (if they exploit application-specific knowledge) even better than, hard-wired in-kernel implementations. A combination of user-level microbenchmarks and end-to-end system measurements using TCP demonstrate the benefits of the ASH system.
Adaptive Distributed and Fault-Tolerant Systems
- International Journal of Computer Systems Science and Engineering
, 1995
"... An adaptive computing system is one that modifies its behavior based on changes in the environment. Since sites connected by a local-area network inherently have to deal with network congestion and the failure of other sites, distributed systems can be viewed as an important subclass of adaptive ..."
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Cited by 52 (6 self)
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An adaptive computing system is one that modifies its behavior based on changes in the environment. Since sites connected by a local-area network inherently have to deal with network congestion and the failure of other sites, distributed systems can be viewed as an important subclass of adaptive systems. As such, use of adaptive methods in this context has the same potential advantages of improved efficiency and structural simplicity as for adaptive systems in general. This paper describes a model for adaptive systems that can be applied in many scenarios arising in distributed and fault-tolerant systems. This model divides the adaptation process into three different phases---change detection, agreement, and action---that can be used to describe existing algorithms that deal with change, as well as to develop new adaptive algorithms. In addition to clarifying the logical structure of such algorithms, this model can also serve as a unifying implementation framework. Several ad...
The SILO Architecture for Services Integration, controL, and Optimization for the Future Internet
- In: IEEE International Conference on Communications, ICC apos
, 2007
"... Abstract — We propose a new internetworking architecture that represents a departure from current philosophy and practice, as a contribution to the ongoing debate regarding the future Internet. Building upon our experience with the design and prototyping of the Just-in-Time protocol suite, we outlin ..."
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Cited by 38 (4 self)
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Abstract — We propose a new internetworking architecture that represents a departure from current philosophy and practice, as a contribution to the ongoing debate regarding the future Internet. Building upon our experience with the design and prototyping of the Just-in-Time protocol suite, we outline a framework consisting of (1) building blocks of fine-grain func-tionality, (2) explicit support for combining elemental blocks to accomplish highly configurable complex communication tasks, and (3) control elements to facilitate (what is currently referred to as) cross-layer interactions. In this position paper, we take a holistic view of network design, allowing applications to work synergistically with the network architecture and physical layers to select the most appropriate functional blocks and tune their behavior so as to meet the application’s needs within resource availability constraints. The proposed architecture is flexible and extensible so as to foster innovation and accommodate change, it supports a unified Internet, it allows for the integration of security and management features at any point in (what is now referred to as) the networking stack, and it is positioned to take advantage of hardware-based performance-enhancing techniques. I.
Real-Time Dependable Channels: Customizing QoS Attributes for Distributed Systems
- IEEE Transactions on Parallel and Distributed Systems
, 1998
"... Communication services that provide enhanced Quality of Service (QoS) guarantees related to dependability and real time are important for many applications in distributed systems. This paper presents real-time dependable (RTD) channels, a communication-oriented abstraction that can be configured to ..."
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Cited by 26 (12 self)
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Communication services that provide enhanced Quality of Service (QoS) guarantees related to dependability and real time are important for many applications in distributed systems. This paper presents real-time dependable (RTD) channels, a communication-oriented abstraction that can be configured to meet the QoS requirements of a variety of distributed applications. This customization ability is based on using CactusRT, a system that supports the construction of middleware services out of software modules called micro-protocols. Each micro-protocol implements a different semantic property or property variant, and interacts with other micro-protocols using an event-driven model supported by the CactusRT runtime system. In addition to RTD channels, CactusRT and its implementation are described. This prototype executes on a cluster of Pentium PCs running the OpenGroup/RI MK 7.3 Mach real-time operating system and CORDS, a system for building network protocols based on the x-kernel. July 9...
Open Implementation and Flexibility in CSCW Toolkits
, 1996
"... The design of Computer-Supported Cooperative Work (CSCW) systems involves a variety of disciplinary approaches, drawing as much on sociological and psychological perspectives on group and individual activity as on technical approaches to designing distributed systems. Traditionally, these have bee ..."
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Cited by 24 (3 self)
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The design of Computer-Supported Cooperative Work (CSCW) systems involves a variety of disciplinary approaches, drawing as much on sociological and psychological perspectives on group and individual activity as on technical approaches to designing distributed systems. Traditionally, these have been applied independently---the technical approaches focussing on design criteria and implementation strategies, the social approaches focussing on the analysis of working activity with or without technological support. However, the disciplines are more strongly related than this suggests. Technical strategies---such as the mechanisms for data replication, distribution and coordination---have a significant impact on the forms of interaction in which users can engage, and therefore on how their work proceeds. Consequently, the findings of sociological and psychological investigations of collaborative working have direct impact for how we go about designing collaborative systems. I...
Constructing a Configurable Group RPC Service
- In Proceedings of the 15th International Conference on Distributed Computing Systems
, 1995
"... Current Remote Procedure Call (RPC) services implement a variety of semantics, with many of the differences related to how communication and server failures are handled. The list increases even more when considering group RPC, a variant of RPC often used for fault-tolerance where an invocation is se ..."
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Cited by 24 (14 self)
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Current Remote Procedure Call (RPC) services implement a variety of semantics, with many of the differences related to how communication and server failures are handled. The list increases even more when considering group RPC, a variant of RPC often used for fault-tolerance where an invocation is sent to a group of servers rather than one. This paper presents an approach to constructing group RPC in which a single configurable system is used to build different variants of the service. The approach is based on implementing each property as a separate software module called a micro-protocol, and then configuring the microprotocols needed to implement the desired service together using a software framework based on the x-kernel. The properties of point-to-point and group RPC are identified and classified, and the general execution model described. An example consisting of a modular implementation of a group RPC service is given to illustrate the approach. Dependency issues that restrict c...
TESLA: A Transparent, Extensible Session-Layer Architecture for End-to-end Network Services
- In Proc. of the Fourth USENIX Symposium on Internet Technologies and Systems (USITS
, 2003
"... This paper describes TESLA, a transparent and extensible framework allowing session-layer services to be developed using a high-level flow-based abstraction. TESLA services can be deployed transparently using dynamic library interposition and can be composed by chaining event handlers in a graph str ..."
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Cited by 20 (0 self)
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This paper describes TESLA, a transparent and extensible framework allowing session-layer services to be developed using a high-level flow-based abstraction. TESLA services can be deployed transparently using dynamic library interposition and can be composed by chaining event handlers in a graph structure. We show how TESLA can be used to implement several session-layer services including encryption, SOCKS, application-controlled routing, flow migration, and traffic rate shaping, all with acceptably low performance degradation
Enabling Flexibility in the Legion Run-Time Library
- IN INTERNATIONAL CONFERENCE ON PARALLEL AND DISTRIBUTED PROCESSING TECHNIQUES AND APPLICATIONS
, 1997
"... This paper describes the design and implementation of the Legion run-time library (LRTL), focusing specifically on facilities that enable extensibility and configurability. These facilities include management of heterogeneous communication, an event-based mechanism for intercomponent communication, ..."
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Cited by 16 (11 self)
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This paper describes the design and implementation of the Legion run-time library (LRTL), focusing specifically on facilities that enable extensibility and configurability. These facilities include management of heterogeneous communication, an event-based mechanism for intercomponent communication, and automated memory management. The paper provides several examples that illustrate the inherent flexibility of the LRTL implementation.
