How does disk performance really affect VMs? Part II
So I left off last time with simple benchmark results having moved my test VM around from one type of storage to the next. If you haven’t read that article, here is a link for you to catch up on. As you may recall we just wrapped up measuring throughput on the various storage types (two SSDs, an eight-disk RAID10 array, and a five-disk RAID5 array). Now, we’ll be measuring the IOPS (I/O Operations Per Second) that these...
How does disk performance really affect VMs?
Part 1 Most people know that SSDs are fast with high IOPS and mechanical disks are slower, offering less speed per unit and lower IOPS, but a better cost per TB. Most “high end” enthusiast SSDs (read: consumer) these days will offer 400+ MB/s and at least 70k IOPS at medium queue depths. Mechanical disks might only offer 75 – 140 IOPS per disk and 100 – 125 MB/s transfer. However, we also know that we can...