> If I understood this thread correctly, the impression of poor > performance is based on a configuration where both the journal and the > data are on the same physical drive. Intuitively, this will likely > penalize any transaction on the volume, read or write, since you're > asking the drive to not only accumulate a queue of information to the > journal in one region of the disk but also to flush that data in "idle > time" to a region in the data space on that same disk at a significant > seek-length away. > > I would think that journaling on one drive and storing the resultant > data-set on another would improve performance enormously (reduced > seek-lengths) and more so if they were 1) high-rpm drives (less > rotational latency) and 2) on different buses (no bus/controller > contention), > > Michael > Yes I have suspected this, there is 2 physical drives in the machine so this would be possible, if its possible to swap the journals round so they journaling for each other I will give it a go tommorow. They both sata 300 drives.
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