Title :
A performance comparison of RAID-5 and log-structured arrays
Author_Institution :
IBM Almaden Res. Center, San Jose, CA, USA
Abstract :
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
Keywords :
cache storage; storage management; RAID-5; compression ratio; log-structured arrays; nonvolatile cache; outboard disk controller; performance comparison; physical disks; transaction-processing workloads; Cache memory; Cache storage; Delay; Nonvolatile memory; Steady-state;
Conference_Titel :
High Performance Distributed Computing, 1995., Proceedings of the Fourth IEEE International Symposium on
Conference_Location :
Washington, DC
Print_ISBN :
0-8186-7088-6
DOI :
10.1109/HPDC.1995.518707
