Workfile Disk Management for Concurrent Mergesorts in a Multiprocessor Database System

摘要

This paper studies workfile disk management for concurrent mergesorts in a multiprocessor database system. Specifically we examine the impacts of workfile disk allocation and data striping on the average mergesort response time. Concurrent mergesorts in a multiprocessor system can create severe I/O interference in which a large number of sequential write requests are continuously issued to the same workfile disk and block other read requests for a long period of time.