fetching from a disk a random block of 1 MB is aproximately 20MB/s for a sata disk ( randomly , all over the disk and over a file system). god help us if the cpu what that slow.
On 11/21/05, Guy <[EMAIL PROTECTED]> wrote: > > -----Original Message----- > > From: [EMAIL PROTECTED] [mailto:linux-raid- > > [EMAIL PROTECTED] On Behalf Of Raz Ben-Jehuda(caro) > > Sent: Sunday, November 20, 2005 6:50 AM > > To: Linux RAID Mailing List > > Subject: comparing FreeBSD to linux > > > > I have evaluated which is better in terms cpu load when dealing with raid. > > FreeBSD vinum's or linux raid. > > When i issued a huge amount of io's read to linux raid i got 93% cpu > > load ( 7% idle), > > while i having 10% cpu load ( 90% idle ) in the freebsd. > > Maybe a silly question... But is it 9.3 times faster under Linux? :) > That would explain the 9.3 times increase in CPU load. > > It is important that you are comparing the CPU load at the same disks rate, > or at least factor in the disk rate. > > Guy > > > > > I need to switch to linux from freebsd. I am using in linux 2.6.6 kernel . > > is problem is a known issue in linux , is it fixed ? > > > > -- > > Raz > > - > > To unsubscribe from this list: send the line "unsubscribe linux-raid" in > > the body of a message to [EMAIL PROTECTED] > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > - > To unsubscribe from this list: send the line "unsubscribe linux-raid" in > the body of a message to [EMAIL PROTECTED] > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- Raz - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
