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Facebook's SSD Findings: Failure, Fatigue, And The Data Center by Robin Harris, Carnegie-Mellon News  ISBN/ITEM#: CM150614FAILURE
Date: 14 June 2015

Links: Article / Carnegie-Mellon Study / Previous TechRevu Article #1 / Previous TechRevu Article #2 /

When it comes to the problems of home users using consumer grade Solid-State Drives (SSDs) and large scale adopters like data centers operated by Facebook and Carnegie-Mellon University using enterprise grade Solid-State Drives (SSDs) , there is a world of difference in their usage patterns and the problems experienced.  Naturally Facebook prefers the biggest enterprise grade Solid-State Drives (SSDs) available, those currently being 3.2 TB.

From release/information:

SSDs revolutionized data storage, even though we know little about how well they work.  Now researchers at Facebook and Carnegie-Mellon share millions of hours of SSD experience

Millions of SSDs are bought every year.  It's easy to be impressed by fast boots and app starts.  But what about 24/7 data center operations?  What are the common problems that admins should be concerned about?

That's what "A Large-Scale Study of Flash Memory Failures in the Field" by Justin Meza and Onur Mutlu of Carnegie Mellon University and Qiang Wu and Sanjeev Kumar of Facebook help answer about SSD behavior.

Basic methodology

Facebook was an early adopter of SSDs.  They were Fusion-io's -- the pioneer PCIe SSD developer -- biggest customer for years, so their SSD experience is deeper than most: millions of device days are included in the study.

Unfortunately the study doesn't break results out by vendor.  Instead, SSDs are classified by age, which means the oldest are roughly first gen devices, while newer devices are second gen.


(Source:, Carnegie-Mellon)

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