We are getting close to the 1 year anniversary of moving to Fusion ioControl, formally known as NexGen Storage. I must say we haven't had any performance problems or complaints from end users since we installed it. My comments below and in other posts should help anyone looking for fast affordable storage decide which way to go.
The new version of ioControl 2.1.1 has proven to be a winner in my book. We aren't using the snapshot capabilities yet but we are growing volumes on a regular basis. Disk tier performance has increased by 70%. I am not a huge fan of the vSphere plug-in yet. For our environment the response time is just too slow compared to me manually creating a new volume and datastore. I think this might be due to their plug-in design and how it integrates with ESX. It does work well once you get it loaded and I think they will dial things in with future updates.
Their reporting features on performance are great as well. If you think you have an issue you can easily nail it down quickly. I would like to see a report for all volumes at once though.
Since the 2.1.1 update our Disk Storage tier (physical disk storage) has stayed below 0.1K IOPS. This tells us the Solid-state Tier is performing most of the work which is what we wanted. I have also as of yet not been able to tax the system for IOPS at all. I was concerned that the dashboard wasn't showing the correct numbers. So I decided to run a few iOMeter tests to see if it was. Turns out the dashboard was 100% correct. We are averaging 800-2000IOPS at any given time. This is hard to believe as we have over 100 Server Class VM’s running along with 65 volumes (45TB). I can only attribute this to my expertise in System Administration or just the raw performance FusionIO provides. All of the numbers for IOPS that Microsoft provides for their applications are far higher than what I am seeing. Around 10x higher to be exact. Likely this is due to spinning disk vs solid-state performance.
I continue to enjoy the relief that Fusion has given us. I suggest you look at Fusion for any IO intensive needs. They have a lot of great products that are inexpensive compared to what you could spend on a competitive solution.