[Bioclusters] A set of notes on how to do RAID optimization on a compute node

[Vsevolod Ilyushchenko]

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")