Systems architecture

About: Systems architecture is a research topic. Over the lifetime, 17612 publications have been published within this topic receiving 283719 citations. The topic is also known as: system architecture.

System support for automatic profiling and optimization

Abstract: The Morph system provides a framework for automatic collection and management of profile information and application of profile-driven optimizations. In this paper, we focus on the operating system support that is required to collect and manage profile information on an end-user's workstation in an automatic, continuous, and transparent manner. Our implementation for a Digital Alpha machine running Digital UNIX 4.0 achieves run-time overheads of less than 0.3% during profile collection. Through the application of three code layout optimizations, we further show that Morph can use statistical profiles to improve application performance. With appropriate system support, automatic profiling and optimization is both possible and effective.

An Autonomous Multi-UAV System for Search and Rescue

Abstract: This paper proposes and evaluates a modular architecture of an autonomous unmanned aerial vehicle (UAV) system for search and rescue missions. Multiple multicopters are coordinated using a distributed control system. The system is implemented in the Robot Operating System (ROS) and is capable of providing a real-time video stream from a UAV to one or more base stations using a wireless communications infrastructure. The system supports a heterogeneous set of UAVs and camera sensors. If necessary, an operator can interfere and reduce the autonomy. The system has been tested in an outdoor mission serving as a proof of concept. Some insights from these tests are described in the paper.

Toward large scale integration: Building a MetaQuerier over databases on the Web

Abstract: The Web has been rapidly “deepened” by myriad searchable databases online, where data are hidden behind query interfaces Toward large scale integration over this “deep Web,” we have been building the MetaQuerier system– for both exploring (to find) and integrating (to query) databases on the Web As an interim report, first, this paper proposes our goal of the MetaQuerier for Web-scale integration– With its dynamic and ad-hoc nature, such large scale integration mandates both dynamic source discovery and on-thefly query translation Second, we present the system architecture and underlying technology of key subsystems in our ongoing implementation Third, we discuss “lessons” learned to date, focusing on our efforts in system integration, for putting individual subsystems to function together On one hand, we observe that, across subsystems, the system integration of an integration system is itself non-trivial– which presents both challenges and opportunities beyond subsystems in isolation On the other hand, we also observe that, across subsystems, there emerge unified insights of “holistic integration”– which leverage large scale itself as a unique opportunity for information integration

From system goals to software architecture

Abstract: Requirements and architecture are two essential inter-related products in the software lifecycle. Software architecture has long been recognized to have a profound impact on non-functional requirements about security, fault tolerance, performance, evolvability, and so forth. In spite of this, very few techniques are available to date for systematically building software architectures from functional and non-functional requirements so that such requirements are guaranteed by construction. The paper addresses this challenge and proposes a goal-oriented approach to architectural design based on the KAOS framework for modeling, specifying and analyzing requirements. After reviewing some global architectural decisions that are already involved in the requirements engineering process, we discuss our architecture derivation process. Software specifications are first derived from requirements. An abstract architectural draft is then derived from functional specifications. This draft is refined to meet domain-specific architectural constraints. The resulting architecture is then recursively refined to meet the various non-functional goals modelled and analyzed during the requirements engineering process.

Disk system architectures for high performance computing

Abstract: Following a brief review of the fundamentals of disk system architecture, the characteristics of the applications that demand high I/O system performance are described. Conventional ways to improve disk performance are discussed. New developments in disk array systems are introduced, and controller architectures are described. >