Joe, This is a very informative article. Thank you. A couple of followup questions: 1. How would I do a software raid with more than two disks. That is, what PC hardware configuration to have more than two independent controllers. The only way to get them that I know of is through a RAID card, but the card will be the bottleneck then. 2. In general, how much of a speedup do you expect if you use 2-disk and 5-disk software raid, compared to the same disk drive used standalone? Thanks, Simon Joe Landman wrote: > Hi folks: > > Chris had asked about methods to to RAID optimization on compute > nodes. The idea being that he could get good/better performance out of > his system if he tuned various options in the software RAID0 under > linux. > > The following URL is a short writeup I had been working on for a while > now. > > http://scientificappliance.com/scalable_fs_part_1.html > > If you have any questions or comments, please feel free to send them to > me. Thanks! > -- Simon (Vsevolod ILyushchenko) simonf@cshl.edu http://www.simonf.com simonf@simonf.com Even computers need analysts these days! ("Spider-Man")