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    SubjectRe: Solaris ZFS on Linux
    On 8/2/06, Krzysztof Halasa <> wrote:
    > Kyle Moffett <> writes:
    > > IMHO the best alternative for a situation like that is a storage
    > > controller with a battery-backed cache and a hunk of flash NVRAM for
    > > when the power shuts off (just in case you run out of battery), as
    > > well as a separate 1GB battery-backed PCI ramdisk for an external
    > > journal device (likewise equipped with flash NVRAM). It doesn't take
    > > much power at all to write a gig of stuff to a small flash chip
    > > (Think about your digital camera which runs off a couple AA's), so
    > > with a fair-sized on-board battery pack you could easily transfer its
    > > data to NVRAM and still have power left to back up data in RAM for 12
    > > hours or so. That way bootup is fast (no reading 1GB of data from
    > > NVRAM) but there's no risk of data loss.
    > Not sure - reading flash is fast, but writing is quite slow.
    > A digital camera can consume a set of 2 or 4 2500 mAh AA cells
    > for a fraction of 1 GB (of course, only a part of power goes
    > to flash).

    Seeks are fast, throughput is terrible, power is minimal:

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