Q

Hard drive cost vs. SSD cost with compression and dedupe

Dennis Martin discusses the cost of hard drives versus the cost of SSDs when using compression and deduplication in this Expert Answer.

Using data compression and dedupe, some vendors claim SSD cost is near parity with the cost of hard drive systems, but is solid-state really a lot more expensive?

I have been watching the metrics on solid-state storage. There is a price-per-gigabyte metric; there is also a price per IOPS and other kinds of metrics. As price per gigabyte continues to drop, it may never catch all hard drives and it may never be on parity with, certainly, bulk-capacity hard drives, but that gap is getting narrower.

At some point, especially when you look at enterprise hard drives like the 10K and the 15K hard drives, the price gap between the cost of SSD and the cost of those drives is getting less and less. At some point it makes sense to say, "At three-to-one, maybe it makes sense; maybe at two-to-one." Somewhere in that range is a good time to just say, "I do not need to buy spindle count. I can go for performance and just get the SSD." It is still a trade-off; do you want capacity or do you want performance? Today, the performance answer is SSD and not 15K drives.

I would say, right now, we are in a transition period, just like we were around 100 years ago between horse-and-buggy and cars. There was a period where both were available and both were around, but now, there is a shift happening. Over time, we are going go more and more to SSDs. We have already seen it in the consumer space. It is starting to happen in the enterprise space.

This was last published in December 2012

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I'd agree Dennis, and maybe distill the argument down even a bit further to the workload level. Just with the horse & buggy vs automobile argument, one size doesn't fit all, as is the case with many workloads in an enterprise.
Some need the hyper performance of SSD and others not so much, but those that do the price delta is very easy to over come.
Ian
Whiptail Canada
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