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The slides from my ZFS presentation at OSCON (as well as some additional information) are available at http://www.meangrape.com/ 2007/08/oscon-zfs/ Jay Edwards jay at meangrape.com http://www.meangrape.com -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mail.opensolaris.org/pipermail/zfs-discuss/attachments/20070802/f2fa7b08/attachment.html>

...blem with ZFS prefering reads to writes. I also see in ''zpool iostat -v 1'' that writes are issued to disk only once in 10 secs, and then its 2000rq one sec. Reads are sustained at cca 800rq/s. Is there a way to tune this read/write ratio? Is this know problem? I tried to change vq_max_pending as suggested by Eric in http://blogs.sun.com/erickustarz/entry/vq_max_pending But no change in this write behaviour. Iostat shows cca 20-30ms asvc_t, 0%w, and cca 30% busy on all drives so these are not saturated it seems. (before with UTF they had 90%busy, 1%wait). System is Sol 10 U2, sun x4200...

Hello, Is it possible to non-destructively change RAID types in zpool while the data remains on-line? -J

Hi all, yesterday we had a drive failure on a fc-al jbod with 14 drives. Suddenly the zpool using that jbod stopped to respond to I/O requests and we get tons of the following messages on /var/adm/messages: Sep 3 15:20:10 fb2 scsi: [ID 107833 kern.warning] WARNING: /scsi_vhci/disk at g20000004cfd81b9f (sd52): Sep 3 15:20:10 fb2 SCSI transport failed: reason ''timeout'':

Hi folks, Myself and a colleague are currently involved in a prototyping exercise to evaluate ZFS against our current filesystem. We are looking at the best way to arrange the disks in a 3510 storage array. We have been testing with the 12 disks on the 3510 exported as "nraid" logical devices. We then configured a single ZFS pool on top of this, using two raid-z arrays. We are getting