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2002

Performance Analysis of a Distributed Question/Answering System

9 years 7 months ago
Performance Analysis of a Distributed Question/Answering System
The problem of question/answering (Q/A) is to find answers to open-domain questions by searching large collections of documents. Unlike information retrieval systems, very common today in the form of Internet search engines, Q/A systems do not retrieve documents, but instead provide short, relevant answers located in small fragments of text. This enhanced functionality comes with a price: Q/A systems are significantly slower and require more hardware resources than information retrieval systems. This paper proposes a distributed Q/A architecture that: enhances the system throughput through the exploitation of inter-question parallelism and dynamic load balancing, and reduces the individual question response time through the exploitation of intra-question parallelism. Inter and intra-question parallelism are both exploited using several scheduling points: one before the Q/A task is started, and two embedded in the Q/A task. An analytical performance model is introduced. The model analy...
Mihai Surdeanu, Dan I. Moldovan, Sanda M. Harabagi
Added 23 Dec 2010
Updated 23 Dec 2010
Type Journal
Year 2002
Where TPDS
Authors Mihai Surdeanu, Dan I. Moldovan, Sanda M. Harabagiu
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