=) i know but, every body tell software is slower, the solution - use hardware ok there´s no opensource firmware for raid hardware i preffer a good software/hardware solution, linux raid is a good software solution for me =) but, why not try a opensource project? hehe what we could do.... a virtual machine :P with only raid and nfs, or make a dedicated cpu for raid (cpu affinity) and a portion of memory only for raid cache (today i think raid software don´t have cache, it shoudn´t, cache is done by linux at filesystem level, i´m right?) 2011/1/21 Wolfgang Denk <wd@xxxxxxx>: > Dear Roberto, > > In message <AANLkTiki_FfRrLtL3dMsrDLXeT8jNO0ndnTNpXk1OXMW@xxxxxxxxxxxxxx> you wrote: >> a good idea.... >> why not start a opensource raid controller? >> what we need? a cpu, memory, power supply with battery or capacitor, >> sas/sata (disk interfaces), pci-express or another (computer >> interface) >> it don´t need a operational system, since it will only run one program >> with some threads (ok a small operational system to implement threads >> easly) >> >> we could use arm, fpga, intel core2duo, atlhon, xeon, or another system... > > You could evenuse a processor dedicated for such a job, like a > PPC440SPe or PPC460SX or similar, which provide hardware-offload > capabilities for the RAID calculations. These are even supported by > drivers in mainline Linux. > > But again, thee would not helpo to maximize IOPS - goal for > optimization has always been maximum sequential troughput only > (and yes, I know exactly what I'm talking about; guess where the > aforementioned drivers are coming from). > > Best regards, > > Wolfgang Denk > > -- > DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel > HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany > Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@xxxxxxx > I don't see any direct evidence ... but, then, my crystal ball is in > dire need of an ectoplasmic upgrade. :-) -- Howard Smith > -- > To unsubscribe from this list: send the line "unsubscribe linux-raid" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- Roberto Spadim Spadim Technology / SPAEmpresarial -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
