May 25, 2012

Post: Aligning IO on a hard disk RAID – the Theory

… RAID is perfectly aligned to disk sectors (again due to the fact operations are done in multiples of 512-bytes), outside of… so in these cases there would be fewer pages spanning multiple disks so the effects of misalignment would be less significant. Here… xfs training slides: D stands for the disk here so the RAID has 4 bearing disks (spindles) and if there’s a misalignment…

Post: Is disk Everything for MySQL Performance ?

…case. There are whole classes of systems where Disk performance is not that important – consider for … Another mistake is to measure IO capacity in spindles – So your hard drive can do 200 random…issues along you need enough concurrency to utilize multiple hard drives and with 50 drives you would…