Content Routing in a Network of WAIS Servers
نویسندگان
چکیده
Locating and accessing information in a large distributed system is a di cult problem of growing importance. This paper reports on our experience building and using a prototype system for transparent, user-guided associative access to the contents of a large, distributed set of WAIS servers. Our system is based on content routing, an architecture that makes use of content labels for locating and accessing information in large distributed systems [12]. Our content router for WAIS servers is implemented as a Semantic File System that constructs content labels from WAIS source and catalog les. The content router guides locating documents by suggesting terms that frequently appear with a given query term in document headlines. Su ciently narrowed queries are routed to WAIS servers and processed in parallel. We have successfully used our content router to locate documents on a large number of WAIS servers. Along with demonstrating the feasibility of distributed nding in a large network of information servers, the prototype shows interactive performance limited primarily by the processing time at WAIS servers.
منابع مشابه
Discover: A Resource Discovery System Based on Content Routing
We have built an HTTP based resource discovery system called Discover that provides a single point of access to over 500 WAIS servers. Discover provides two key services: query re nement and query routing. Query re nement helps a user improve a query fragment to describe the user's interests more precisely. Once a query has been re ned and describes a manageable result set, query routing automa...
متن کاملContent routing: a scalable architecture for network-based information discovery
This thesis presents a new architecture for information discovery based on a hierarchy of content routers that provide both browsing and search services to end users. Content routers catalog information servers, which may in turn be other content routers. The resulting hierarchy of content routers and leaf servers provides a rich set of services to end users for locating information, including ...
متن کاملDiscover : A Resource Discovery System based on ContentRoutingMark
We have built an HTTP based resource discovery system called Discover that provides a single point of access to over 500 WAIS servers. Discover provides two key services: query reene-ment and query routing. Query reenement helps a user improve a query fragment to describe the user's interests more precisely. Once a query has been reened and describes a manageable result set, query routing autom...
متن کاملApplication of UM-D to Optimal Server Selection for Content Routing
The main objective of content routing is to speed up the access time from the customers to content held in servers, by selecting appropriate servers without user intervention. We assume that the content is replicated in multiple servers of the network. Finding efficient algorithms for optimal selection of a content server and the delivery routes is a very important topic in content routing rese...
متن کاملHierarchical content routing in large-scale multimedia content delivery network
Content Delivery Network (CDN) is an intermediate layer of infrastructure that helps to efficiently deliver the ever increasing multimedia content from content providers to a large community of geographically distributed clients. Content routing is an essential component of CDN architecture. In this paper we propose a hierarchical content routing architecture for large-scale CDN, in which CDN s...
متن کامل