8TB SSD in Azure vs. 8 1TB SSD in Azure

With the 8TB SSD drives that Azure has, which makes the most sense to use multiple 1TB SSDs or the 8TB SSD drives? Well that depends. The 8TB SSDs give you 7500 IOPs and 250 MB/sec, but if I take 8 1TB SSD drives I can get 1600 MB/sec of throughput and 40,000 IOPs in the same amount of space.

Of course I need to stripe the 8 disks together in Windows, but there’s no cost for that. The cost of 8 1TB drives is slightly higher than 1 8TB drive by 114 pounds in the case of this screenshots. But given the performance difference it’s a cost worth having.

So why would I want the 8TB drive, because I have a GS5 that needs 1/2PB of storage. There’s no “easy” way to do that with 1TB drives. If/when we get P70+ drives things will get really interesting.

ssd

Denny

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About the Author

Denny Cherry

About the Author

I am a Senior SQL Server DBA at CDW with 10 years of IT experience, mostly as a software developer building web and windows based applications (VB, VB.NET, C#, C++ and a smidge of Java). I have always found database design and set based logic interesting, so 3 years ago I took the plunge and became a DBA, soon after I discovered people would tell anyone who would listen all about the SQL Server internals. I was hooked. I have not looked back since. The things I say represent my opinion and in no way represent the views or opinions of my employer or coworkers.