jnem...@cue.bc.ca (John Nemeth) writes:
>On Dec 27, 6:49pm, Michael van Elst wrote:
>} So far that's mostly a problem with software raid and modern tape I/O.
> Wouldn't hardware RAID also benefit from bigger buffers?
>Although, I suppose a battery backed cache be used to workaround
>small transfer sizes.
The transfer size currently limits I/O of stripes because it is split
over all stripe units (drives). A hardware controller does this internally
and isn't affected by MAXPHYS.
Of course larger transfers would also mitigate the overhead for each I/O
operation, but we already do several Gigabyte/s with 64k transfers and
filesystem I/O tends to be even smaller.
--
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Michael van Elst
Internet: mlel...@serpens.de
"A potential Snark may lurk in every tree."
