Dnia 2009-04-23, czw o godzinie 15:09 +0200, Christopher Smith pisze: > Gordan Bobic wrote: > > > To pick the optimum RAID block size, look at the disks. What is the > > multi-sector transfer size they can handle? I have not seen any disks > > to date that have this figure at anything other than 16, and > > 16sectors * 512 bytes/sector = 8KB. > > > > So set the RAID block size to 8KB. > > Is this "chunk size" ? Or would chunk size be #disks*8KB ? > > > This is also why quite frequently a cheap box made of COTS components > > can complete blow away a similar enterprise grade box with 10-100x > > the price tag. > > In fairness, those enterprise boxes typically have dual redundant > controllers with mirrored cache, and other failure-resistant goodies you > can't really do with COTS hardware. ;) I don't want to stir the hornet's nest but just look at that: http://linux.yyz.us/why-software-raid.html There is no clear winner in that bet, but knowing pros and cons of both approaches helps choose the best. peace -- Piotr Baranowski Open Source Education Center www.osec.pl
Attachment:
signature.asc
Description: To jest =?UTF-8?Q?cz=C4=99=C5=9B=C4=87?= =?UTF-8?Q?_wiadomo=C5=9Bci?= podpisana cyfrowo
-- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
