Hi, I can't change the drives yet since I need this storage available very soon (in few days). So, even if I have to fall-back to UFS, I'll keep those drives for few months.
Anyway, I'm currently doing some tests on this X4500 ; With only 2 drives in mirror, I have the same issue : perfs are ok, then drop after few hours of intensive usage.. The strange thing is that if I export and re-import the mirror pool... the perfs are back again for few minutes.. then drop. I don't have any explanation. I'll now test the drives with UFS with fragsize=4k and bsize=8k ; if the performances issues are misalignment-related, the perfs should be ok. After that, i'll try to create a zfs-over-ufs solution. It should do the trick until I change the drives. Along that, I've opened a ticket with western digital about this problem. By the way, I also use some SSD drives in the NAS ; those drive have 8k sectors, but they are reported as 512b sectors. The perfs are ok, but i think that they could be better if I'd found a way to indicate zfs the correct block size. Regards, Greg. -- This message posted from opensolaris.org _______________________________________________ storage-discuss mailing list storage-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/storage-discuss
