@InCollection{hu:rapid-cache,
  author = {Yiming Hu and Qing Yang and Tycho Nightingale},
  title = {{RAPID-Cache}--- A Reliable and Inexpensive Write Cache for Disk
  {I/O} Systems},
  booktitle = {Proceedings of the 5th International Symposium on High
  Performance Computer Architecture},
  year = {2001},
  month = {January},
  pages = {204--213},
  publisher = {IEEE Computer Society Press},
  later = {hu:brapid-cache},
  URL = {http://computer.org/proceedings/hpca/0004/00040204abs.htm},
  keywords = {parallel I/O, disk cache, disk striping, disk aray, pario-bib},
  abstract = {This paper presents a new cache architecture called RAPID-Cache
  for Redundant, Asymmetrically Parallel, and Inexpensive Disk Cache. A typical
  RAPID-Cache consists of two redundant write buffers on top of a disk system.
  One of the buffers is a primary cache made of RAM or NVRAM and the other is a
  backup cache containing a two level hierarchy: a small NVRAM buffer on top of
  a log disk. The backup cache has nearly equivalent write performance as the
  primary RAM cache, while the read performance of the backup cache is not as
  critical because normal read operations are performed through the primary RAM
  cache and reads from the backup cache happen only during error recovery
  periods. The RAPID-Cache presents an asymmetric architecture with a
  fast-write-fast-read RAM being a primary cache and a fast-write-slow-read
  NVRAM-disk hierarchy being a backup cache. The asymmetric cache architecture
  allows cost-effective designs for very large write caches for high-end disk
  I/O systems that would otherwise have to use dual-copy, costly NVRAM caches.
  It also makes it possible to implement reliable write caching for low-end
  disk I/O systems since the RAPID-Cache makes use of inexpensive disks to
  perform reliable caching. Our analysis and trace-driven simulation results
  show that the RAPID-Cache has significant reliability/cost advantages over
  conventional single NVRAM write caches and has great cost advantages over
  dual-copy NVRAM caches. The RAPID-Cache architecture opens a new dimension
  for disk system designers to exercise trade-offs among performance,
  reliability and cost.}
}