December 21, 201411 yr Interesting read. http://blog.ioflood.com/2014/12/20/cloudflare-agrees-disk-performance-is-improved-when-you-get-rid-of-hardware-raid/
December 21, 201411 yr Depends on the HW RAID card and the mobo you would do MDRaid with.... and how much CPU you can spare for running MDRaid.
December 30, 201411 yr Talk about out of context... First, they are talking about pure SSD systems, which would require a "not cheap" RAID hardware. They don't need redundancy, or even better than single drive performance, so the fast, expensive RAID controller is overkill. Second, they increased the RAM from 48Gb to 128GB, allocating 100GB to file cache. So, the speed is increased by RAM cache, reducing the need for faster storage. The RAM is probably less expensive than the RAID controller, so a wise move. Yeah, "Disk performance is improved when you get rid of hardware raid, and replace it with 5x RAM cache"
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