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Additionally, there is also support for mapping memory regions to applications, providing an even more efficient way of accessing persistent memory storage. This feature is also known as {{snia|direct access}} or {{snia|DAX}} (note the term is used by both [[Linux]] and [[Windows]]). Memory-mapping a file can only be done once the file has already been created/opened, thereby already undergone the necessary permission checks. Memory-mapping a persistent file is done using the same function calls that already exist on both Windows and Linux. From the software point of view, the storage new becomes byte-addressable storage.
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Additionally, there is also support for mapping memory regions to applications, providing an even more efficient way of accessing persistent memory storage. This feature is also known as [[direct access]] or [[DAX]] (note the term is used by both [[Linux]] and [[Windows]]). Memory-mapping a file can only be done once the file has already been created/opened, thereby already undergone the necessary permission checks. Memory-mapping a persistent file is done using the same function calls that already exist on both Windows and Linux. From the software point of view, the storage new becomes byte-addressable storage.
  
 
{| class="wikitable"
 
{| class="wikitable"
! colspan="2" | [[Memory-mapped file]] APIs
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! colspan="2" | Basic File APIs
 
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| Windows || Linux
 
| Windows || Linux
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== Documents ==
 
== Documents ==
 
* [https://www.snia.org/sites/default/files/NVMProgrammingModel_v1.pdf NVM Programming Model (NPM), Version 1. 2013.]
 
* [https://www.snia.org/sites/default/files/NVMProgrammingModel_v1.pdf NVM Programming Model (NPM), Version 1. 2013.]
 
== See also ==
 
* x86's {{x86|Persistent Memory Extensions}}
 

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