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 Optimizing Disk Subsystems for Random I/O

On Lamp talks about optimizing disk subsystems .

"So we're going to need about four disks, which we would expect to give us about 320 I/O operations per second. Three disks would only give us 240 I/Os per second, which is awfully close -- however, we really want an additional 20-30 percent (50 to 80 I/Os) to provide some margin for overhead. (As a reminder, the 307 Corporation is using a Sun Ultra Enterprise 3500 -- the four disks are Fibre Channel and are installed internally as devices c1t4, c1t5, c1t6, and c1t7.)"

 (Submitted by Noel Fri May 10, 2002 )


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