@InProceedings{chiung-san:xdac, author = {Lee Chiung-San and Parng Tai-Ming and Lee Jew-Chin and Tsai Cheng-Nan and Farn Kwo-Jean}, title = {Performance analysis of the {XDAC} disk array system}, booktitle = {Proceedings of the 1994 IEEE Symposium on Parallel and Distributed Processing}, year = {1994}, pages = {620--627}, publisher = {IEEE Computer Society Press}, keywords = {disk array, performance evaluation, analytical model, parallel I/O, pario-bib}, abstract = {The paper presents an analytical model of a whole disk array architecture, XDAC, which consists of several major subsystems and features: the two-dimensional array structure; IO-bus with split transaction protocol; and cache for processing multiple I/O requests in parallel. Our modelling approach is based on a subsystem access time per request (SATPR) concept, in which we model for each subsystem the mean access time per disk array request. The model is fed with a given set of representative workload parameters and then used to conduct performance analysis for exploring the impact of fork/join synchronization as well as evaluating some architectural design issues of the XDAC system. Moreover, by comparing the SATPRs of subsystems, we can identify the bottleneck for performance improvements.} }