2 Commits

Author	SHA1	Message	Date
Pawel Jakub Dawidek	f5a2f7feac	Implement new reading algorithm, which will use parity component for reading ... as well, even if device is in complete state. I observe 40% of speed-up with this option for random read operations, but slowdown for sequential reads. Basically, without this option reading from a RAID3 device built from 5 components (c0-c4) looks like this: Request no. Used components 1 c0+c1+c2+c3 2 c0+c1+c2+c3 3 c0+c1+c2+c3 With the new feature: Request no. Used components 1 c0+c1+c2+c3 2 (c1^c2^c3^c4)+c1+c2+c3 3 c0+(c0^c2^c3^c4)+c2+c3 4 c0+c1+(c0^c1^c3^c4)+c3 5 c0+c1+c2+(c0^c1^c2^c4) 6 c0+c1+c2+c3 [...]	2004-08-21 18:11:46 +00:00
Pawel Jakub Dawidek	2d1661a5b6	Introduce GEOM RAID3 class, i.e. kernel module, which implements RAID3 ... transformation and graid3(8) userland utility, which can be used for configuration. No manual page yet, sorry. Hardware provided by: Daniel Seuffert	2004-08-16 06:23:14 +00:00