Pile of fire wood

Interesting article on NVM (Non-Volatile Memory) – this is non-volatile RAM you can plug into a memory DIMM. It is about 1000 times faster than an SSD and byte addressable, also the expectation is that the size will be huge – TBs. To access full performance you have to bypass the OS page cache etc (OS and DB are designed for slow disks) using DAX.

The paper also has a nice introduction to Write Ahead Logging (WAL) which is used in nearly all databases.

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