> 2. ZFS doesn't make much sense for high-performance laptops. Laptop drives > are slow enough without artificially increasing the number of seeks on > writes. Apple makes a LOT of money from laptops. It's also unclear how well > ZFS would play with other latency- and CPU-sensitive applications such as > video. Not that it's bad, we just don't know yet.
You are aware that one things ZFS does is to group writes (through ZIL), so it can write them out sequentially and possibly all in the same place? On top of that you get prefetching. Having the filesystem read escalator sorted big chunks into the cache instead of non-stop issuing small requests may also save some power and improve latency (though in this case, there would need to be an attribute limiting the amount of data to be read in one swoop for certain applications. Having ZFS read like 100 megabytes in one go might produce spikes in CPU usage). -mg
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