Le 15 févr. 08 à 18:24, Bob Friesenhahn a écrit : > On Fri, 15 Feb 2008, Roch Bourbonnais wrote: >>> >>> As mentioned before, the write rate peaked at 200MB/second using >>> RAID-0 across 12 disks exported as one big LUN. >> >> What was the interlace on the LUN ? >
The question was about LUN interlace not interface. 128K to 1M works better. > There are two 4Gbit FC interfaces on an Emulex LPe11002 card which are > supposedly acting in a load-share configuration. > >> If this is 165MB application rate consider that ZFS sends that much >> to each >> side of the mirror. >> Your data channel rate was 330MB/sec. > > Yes, I am aware of the ZFS RAID "write penalty" but in fact it has > > only cost 20MB per second vs doing the RAID using controller firmware > (150MB vs 170MB/second). This indicates that there is plenty of > communications bandwidth from the host to the array. The measured > read rates are in the 470MB to 510MB/second range. > Any compression ? Does turn off checksum helps the number (that would point to a CPU limited throughput). -r > While writing, it is clear that ZFS does not use all of the drives for > writes at once since the drive LEDs show that some remain > temporarily idle and ZFS cycles through them. > > I would be very happy to hear from other StorageTek 2540 owners as to > the write rate they were able to achieve. > > Bob > ====================================== > Bob Friesenhahn > [EMAIL PROTECTED], http://www.simplesystems.org/users/bfriesen/ > GraphicsMagick Maintainer, http://www.GraphicsMagick.org/ > > _______________________________________________ > zfs-discuss mailing list > zfs-discuss@opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
