Browsing College of Arts and Sciences by Author "Heddaya, Abdelsalam"

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Browsing College of Arts and Sciences by Author "Heddaya, Abdelsalam"

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  • Application-Level Document Caching in the Internet
    Bestavros, Azer; Carter, Robert L.; Crovella, Mark E.; Cunha, Carlos R.; Heddaya, Abdelsalam; Mirdad, Sulaiman A. (Boston University Computer Science Department, 1995-01-15)
    With the increasing demand for document transfer services such as the World Wide Web comes a need for better resource management to reduce the latency of documents in these systems. To address this need, we analyze the ...
  • Communicable Memory and Lazy Barriers for Bulk Synchronous Parallelism in BSPk
    Fahmy, Amr; Heddaya, Abdelsalam (Boston University Computer Science Department, 1996-09-20)
    Communication and synchronization stand as the dual bottlenecks in the performance of parallel systems, and especially those that attempt to alleviate the programming burden by incurring overhead in these two domains. We ...
  • Distributed Parallel Computing in Mermera: Mixing Noncoherent Shared Memories
    Heddaya, Abdelsalam; Sinha, Himanshu (Boston University Computer Science Department, 1996-03-07)
    Programmers of parallel processes that communicate through shared globally distributed data structures (DDS) face a difficult choice. Either they must explicitly program DDS management, by partitioning or replicating it ...
  • An Implementation of Mermera: A Shared Memory System that Mixes Coherence with Non-coherence
    Heddaya, Abdelsalam; Sinha, Himanshu (Boston University Computer Science Department, 1993-06-04)
    Coherent shared memory is a convenient, but inefficient, method of inter-process communication for parallel programs. By contrast, message passing can be less convenient, but more efficient. To get the benefits of both ...
  • Mapping Parallel Iterative Algorithms onto Workstation Networks
    Heddaya, Abdelsalam; Park, Kihong (Boston University Computer Science Department, 1994-02-07)
    For communication-intensive parallel applications, the maximum degree of concurrency achievable is limited by the communication throughput made available by the network. In previous work [HPS94], we showed experimentally ...
  • OS Support for Portable Bulk Synchronous Parallel Programs
    Heddaya, Abdelsalam; Fahmy, Amr (Boston University Computer Science Department, 1994-12-05)
    Predictability -- the ability to foretell that an implementation will not violate a set of specified reliability and timeliness requirements -- is a crucial, highly desirable property of responsive embedded systems. This ...
  • Reliability, Availability, Dependability and Performability: A User-centered View
    Heddaya, Abdelsalam; Helal, Abdelsalam (Boston University Computer Science Department, 1997-12-04)
    Reliability and availability have long been considered twin system properties that could be enhanced by distribution. Paradoxically, the traditional definitions of these properties do not recognize the positive impact of ...
  • Resource Management for Responsive Web Computing
    Bestavros, Azer; Chen, Marina; Crovella, Mark; Heddaya, Abdelsalam; Sclaroff, Stan; Cowie, James (Boston University Computer Science Department, 1996-03-21)
    The exploding demand for services like the World Wide Web reflects the potential that is presented by globally distributed information systems. The number of WWW servers world-wide has doubled every 3 to 5 months since ...
  • Using Warp to Control Network Contention in Mermera
    Heddaya, Abdelsalam; Park, Kihong; Sinha, Himanshu (Boston University Computer Science Department, 1993-06-04)
    Parallel computing on a network of workstations can saturate the communication network, leading to excessive message delays and consequently poor application performance. We examine empirically the consequences of integrating ...
  • WebWave: Globally Load Balanced Fully Distributed Caching of Hot Published Documents
    Heddaya, Abdelsalam; Mirdad, Sulaiman (Boston University Computer Science Department, 1996-10-10)
    Document publication service over such a large network as the Internet challenges us to harness available server and network resources to meet fast growing demand. In this paper, we show that large-scale dynamic caching ...

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