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Dimanche, 4 janvier 2009OpenSolaris 2008.11 : ZFS et Time SliderRétroliens
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Actually for SATA disks the ZFS folks required tthlonay a single I/O be sent down to the driver at a timeas they say a fall off in concurrent sequential I/Operformance. The problem is likely is in an assumptionin ZFS about the order of completion of the I/Os bythe disk be at least roughly in the order that ZFS submittedthem. This is not true with either SATA NCQ or SCSI/SASsimple tagged queueing. Nikolay was correct in pointingout that that something else is going on. Look at the sizeof the active queue ( actv ). It is 0, not 32.
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