On 9 December 2014 at 20:22, Tim Hamilton <hamilton.tim@gmail.com> wrote:
If any of you had my hardware, how would you construct your storage layout?
The more disks you have, the higher the chance of having a disk failure. The older the disks you have, the higher the chance of having a disk failure. I like low-maintenance, high-reliability solutions where they fit well, so I would aim for a system that uses a few, large, disks, and plan to replace them in 2-3 years.
Your 7200RPM disk gets very likely gets under 100IOPS. More like 75. If you are aiming for capacity with no regard for performance then fewer, larger disks is likely a good solution, but if you have any performance requirements at all then a greater number of smaller disks is a better option. Performance should scale pretty much linearly with an increasing number of disks for RAID10. Failing that, get a couple of small SSD's in a RAID1 configuration and run bcache in front of your rotating disks. The performance difference is amazing. James