Re: ccd performance (was: [ GEOM tests ] vinum drives lost)

2002-10-07 Thread Matthew Dillon
: a lot of information on how to use it. I generally recommend : using a stripe size of 1152 for multitasking loads. : :Sectors? Why particularly this value? It's described in 'tuning'. Basically you want a fairly large stripe to reduce multi-disk seeking when reading

Re: ccd performance (was: [ GEOM tests ] vinum drives lost)

2002-10-07 Thread Terry Lambert
Matthew Dillon wrote: But, again, CCD is not trying to implement 'real' RAID. It can't rebuild a lost mirror drive, for example, and does not implement RAID-5. IMHO A real RAID controller with NVRAM should be used for those things. FWIW, the people who sell RAID controllers with

ccd performance (was: [ GEOM tests ] vinum drives lost)

2002-10-06 Thread Greg 'groggy' Lehey
On Sunday, 6 October 2002 at 11:30:16 -0700, Matthew Dillon wrote: Yes, ccd is fairly light weight. 'man tuning' and 'man ccd' has a lot of information on how to use it. I generally recommend using a stripe size of 1152 for multitasking loads. Sectors? Why particularly this