Hi guys, I am trying to get a RAID 10 configuration working at work, but seem to hit a performance wall after 20 minutes into a DB creation session. Here's the setup: OS: Oracle Linux 5.9 (effectively RHEL 5.9), kernel 2.6.32-400.29.2.el5uek. All utilities updates, mdadm (2.6.9 latest through updates). Setup: Two Fusion IO Duo cards, each Fusion IO device 640 GB, so four in total. Raid 10 set up as: striped between the two IO devices on the same Fusion IO card, and mirrored between the separate cards. So, Fusion IO card 1, device fioa and fiob, Fusion IO card 2, device fioc and fiod. The two stripes are fioa/fiob and fioc/fiod, and a mirror between these devices: mdadm --create --verbose /dev/md0 --level=10 --metadata=1.2 --chunk=512 --raid-devices=4 /dev/fioa /dev/fioc /dev/fiob /dev/fiod --assume-clean -N md0 When the performance turned out bad, after about 20 minutes, the process was stopped. I broke the mirror, so the md0 device is only striped, but the performance hit after 20 minutes happened again. The status of all cards are fine, no problems there. Then I created a fs on only one device and have it run again. This time it worked fine. The fs was in all cases ext3, no TRIM. Any suggestions, experience with this kind of setup? Thanks, Albert -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
