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Caching, Flash, Disk, and the Future of Storage

henryOver at Enterprise Storage Forum, Henry Newman from Instrumental writes that the popular notion that disks are going away is fading fast. In fact, hybrid storage environments are proving to be much more practical than all-flash or all-disk storage.

So if you believe that my assumption that data that is regularly accessed (aka hot data), will be migrated from spinning disk to flash and data that is not used very much (aka cold data) will be migrated from flash to spinning disk, what are going to be the challenges for different implementation of flash cached storage? All of this is very interesting given the latest release on the drop in revenue for flash storage of 6.6%, which means that there is not likely going to be the hundreds of billions of dollars in investment to replace disk drives.

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