Use cache driver to accelerate disk access

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Our cache driver combines different storage devices, benefits from their advantages and overcomes their disadvantages. Besides, no need to modify application logic. It can support 2-level cache, the first is RAM, the second is a relative faster storage device, for example, SSD, or even fusion IO.
These images are taken from a running cafe. Its game disk is using 20GB RAM + 40GB SSD + 1TB HDD.
If a server requires a large storage capacity, while wants to access hot data fast, no need to modify the server application, install the cache driver, config ram cache(level 1) and ssd cache(level 2). for example, 100GB RAM + 1.5TB fusion IO + 40TB RAID0 HDD.

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