Le 30 mars 07 à 08:36, Anton B. Rang a écrit :
However, even with sequential writes, a large I/O size makes a huge
difference in throughput. Ask the QFS folks about data capture
applications. ;-)
I quantified the 'huge' this as such
60MB/s and 5ms per seek means that for a FS that requires a seek per
I/O (QFS ?)
the throughput at infinite I/O size will be at most 10% better than
at 3MB I/O size.
For ZFS the equation does not stand because it does not incur a seek
per I/O.
-r
(This is less true with ATA disks that tend to have less buffering
and much less sophisticated architectures. I'm not aware of any
dual-processor ATA drives, for instance.)
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