Following my previous benchmarks of SATA SSD cards I got Intel SSD 520 240GB into my hands. In this post I show the results of raw IO performance of this card.
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I personally like PCIe based Flash, but from a pricing point our customers are looking for cheaper alternatives. SATA SSD is an options. There is many products based on MLC technology, and Intel 320 I would say is the most popular. I do not particularly like its write performance – I wrote about it before, that’s why I am looking for comparable alternatives. Samsung 830 256GB looked like a good product, that’s why I decided to test it.
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As MLC-based SSD cards are raising popularity, there is also a raising concern how long it can survive. As we know, a MLC NAND module can handle 5,000-10,000 erasing cycles, after which it gets unusable. And obviously the SSD card based on MLC NAND has a limited lifetime. There is a lot of misconceptions and misunderstanding on how long such card can last, so I want to show some calculation to shed a light on this question.
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It is known that MySQL due internal limitations is not able to utilize
all CPU and IO resources available on modern hardware.
Idea is to run multiple instances of MySQL to gain better performance on Fusion-io ioDrive card.

Full report is available in PDF

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