Good old document with description of internal mechanics - SAP HANA and NVRAM technology
http://www.vldb.org/pvldb/vol10/p1754-andrei.pdf
Quote: "Currently, the following storage types are supported: 1. DAX-enabled filesystem backed by real NVRAM DIMMs 2. Traditional file system backed by SHM/SSD/HDDs (Simulation) The programming model is based upon memory-mapped files, and hence the NVRAM Block Provider not only leverages the load/store capabilities of persistent memory, but can also work correctly with any other storage technology (e.g. SSDs)."
http://www.vldb.org/pvldb/vol10/p1754-andrei.pdf
Quote: "Currently, the following storage types are supported: 1. DAX-enabled filesystem backed by real NVRAM DIMMs 2. Traditional file system backed by SHM/SSD/HDDs (Simulation) The programming model is based upon memory-mapped files, and hence the NVRAM Block Provider not only leverages the load/store capabilities of persistent memory, but can also work correctly with any other storage technology (e.g. SSDs)."
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