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A new report claims that SSD adoption is doomed to stall in the
enterprise, but uses highly questionable metrics for that conclusion.
As NAND flash shipments
continue to boom, the expectation has been that the technology would
continue to gain ground in both the consumer and enterprise markets. A
new report at the Enterprise Storage Forum challenges that assumption,
arguing that NAND’s benefits have been vastly overstated. The author
makes some excellent points about the headwinds that the SSD market
faces, including high prices, and data retention challenges at lower
process geometries. Intel and Micron have had to work hard to bring each
generation of enterprise NAND up to snuff, which is one reason why new
products are introduced on consumer hardware first.
But the
performance metrics introduced in this story as purported evidence for
why the SSD case in enterprise has been overstated
As NAND flash shipments
continue to boom, the expectation has been that the technology would
continue to gain ground in both the consumer and enterprise markets. A
new report at the Enterprise Storage Forum challenges that assumption,
arguing that NAND’s benefits have been vastly overstated. The author
makes some excellent points about the headwinds that the SSD market
faces, including high prices, and data retention challenges at lower
process geometries. Intel and Micron have had to work hard to bring each
generation of enterprise NAND up to snuff, which is one reason why new
products are introduced on consumer hardware first.
But the
performance metrics introduced in this story as purported evidence for
why the SSD case in enterprise has been overstated are laughably terribly.
If you have to invent an entirely new metric for performance
measurement (drive price divided by GB/s of bandwidth), you derive that
measurement differently for different drives, and you measure power
consumption in W/GB/s of bandwidth as opposed to a simple wall socket
test, you’re not going to walk away from the comparison looking real
smart.
Where SSDs do and don’t make sense
Multiple reports
and documented studies over the past few years have compared enterprise
hard drive performance against SSDs, which is why I’m surprised to see a
supposed takedown of the topic rely on such half-baked analysis. What
performance studies consistently demonstrate is the real-world
performance gap between SSDs and HDDs is directly dependent on
concurrent data requests. The following graph from a Dell performance
comparison illustrates this well:
.
If you have to invent an entirely new metric for performance
measurement (drive price divided by GB/s of bandwidth), you derive that
measurement differently for different drives, and you measure power
consumption in W/GB/s of bandwidth as opposed to a simple wall socket
test, you’re not going to walk away from the comparison looking real
smart.
