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A performance comparison of RAID-5 and log-structured arrays

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1 Author(s)
Menon, J. ; IBM Almaden Res. Center, San Jose, CA, USA

In this paper, we compare the performance of the well-known RAID-5 arrays to that of log-structured arrays (LSA), on transaction-processing workloads. LSA borrows heavily from the log-structured file system (LFS) approach, but is executed in an outboard disk controller. The LSA technique we examine combines LFS, RAID, compression and non-volatile cache. We look at sensitivity of LSA performance to amount of free space on the physical disks and to the compression ratio achieved. We also evaluate a RAID-5 design that supports compression in cache

Published in:

High Performance Distributed Computing, 1995., Proceedings of the Fourth IEEE International Symposium on

Date of Conference:

2-4 Aug 1995