On 04/05/11 13:30, Drew wrote:
It seemed logical to me that if two disks had the same data and we were reading an arbitrary amount of data, why couldn't we split the read across both disks? That way we get the benefits of pulling from multiple disks in the read case while accepting the penalty of a write being as slow as the slowest disk..
I would have thought as you'd be skipping alternate "stripes" on each disk you minimise the benefit of a readahead buffer and get subjected to seek and rotational latency on both disks. Overall you're benefit would be slim to immeasurable. Now on SSD's I could see it providing some extra oomph as you suffer none of the mechanical latency penalties.
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