Institute for Systems Research

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Author: search.filters.author.Kelley, StephenSubject: search.filters.subject.network management

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    Managing File Subsystem Data Streams for Databases on Networked Systems
    (1996) Gupta, Sandeep K.; Baras, John S.; Kelley, Stephen; Roussopoulos, Nick; ISR; CSHCN
    One important activity for networked database systems that distribute data across several workstations is moving data between the file and network subsystems. It is possible to create data streams in the operating system kernel. If provided on a system, they allow user level processes to request transfer of data without having t copy it into the user space. This is particularly useful for data whose content or format is not modified during the transfer. In this paper we present a conservative criterion for access and control for the management of such data streams for databases in a networked environment, and define the implementation requirements for achieving the criterion. The approach is to maintain at least the current level of access management. We define the specific implementation semantics that this criterion entails.

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    Simple Calls for Flexible Constructs Using the Traditional File API
    (1996) Gupta, Sandeep; Baras, John S.; Kelley, Stephen; Roussopoulos, N.; ISR
    We present the design for a remote qos control interface to the transport protocol based on existing work for similar applications. This puts together the read/write calls from the traditional file system API and an additional primitive. The addition amounts to programming an operating system data- streaming service which may be provided as a system call or otherwise using the standard techniques. Put together these allow much more than the traditional call based control interface. The resulting interface simplifies the mechanisms for distributed control. Parts of this interface have also been implemented in our ongoing experiments with file transfer.