ext4 and XFS file systems now support DAX

msdnchina

于 2019-03-21 23:16:26 发布

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文章标签： dax rhel7 nvdimm

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博客链接指向 Red Hat Enterprise Linux 7 的 7.5 版本发行说明中关于文件系统的技术预览内容，涉及 dax、nvdimm 等相关技术，属于信息技术领域中操作系统相关内容。

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https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/7.5_release_notes/technology_previews_file_systems

ext4 and XFS file systems now support DAX
Starting with Red Hat Enterprise Linux 7.3, Direct Access (DAX) provides, as a Technology Preview, 
a means for an application to directly map persistent memory into its address space. 
To use DAX, a system must have some form of persistent memory available, 
usually in the form of one or more Non-Volatile Dual In-line Memory Modules (NVDIMMs), 
and a file system that supports DAX must be created on the NVDIMM(s). 
Also, 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. (BZ#1274459)