File Systems and Storage
The following features that are related to file systems and storage are available as technology preview.
DAX File System Available
In this release,
the DAX file system is available as a Technology Preview for the ext4 and XFS file systems.
DAX enables an application to directly map persistent memory into its address space. The
system must have some form of persistent memory available to use DAX. Persistent memory can be
in the form of one or more Non-Volatile Dual In-line Memory Modules (NVDIMMs). In addition, a
file system that supports DAX must be created on the NVDIMMs; the file system must be mounted
with the dax mount option. Then, an mmap of a file on the
DAX mounted file system results in a direct mapping of storage into the application's address
space.