@InProceedings{menon:compare, author = {Jai Menon}, title = {A Performance Comparison of {RAID-5} and Log-structured Arrays}, booktitle = {Proceedings of the Fourth IEEE International Symposium on High Performance Distributed Computing}, year = {1995}, month = {August}, pages = {167--178}, later = {menon:bcompare}, keywords = {RAID, disk array, parallel I/O, pario-bib}, comment = {He compares a RAID-5 disk array with a log-structured array (LSA). An LSA is essentially an implementation of a log-structured file system inside a disk controller. The disk controller buffers up writes in a non-volatile cache; when the outgoing data buffer is full, it is written to some large contiguous region of the disk. The controller manages a directory to keep track of the various segment locations, and does garbage collection (cleaning). They can insert a compression algorithm in front of the cache so that they get better cache and disk utilization by storing data in compressed form. for fair comparison they compare with a similar feature in the plain RAID5 array.} }