> I do see that all the devices are quite evenly busy. There is no > doubt that the load balancing is quite good. The main question is if > there is any actual "striping" going on (breaking the data into > smaller chunks), or if the algorithm is simply load balancing. > Striping trades IOPS for bandwidth.
There's no striping across vdevs going on. It's simple load balancing, i.e. blocks are spread semi-randomly across the vdevs. I say semi because apparently the average bandwidth load of the vdevs influence the outcome. -mg
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