Originally designed for media streaming requiring predictable latencies
Metadata and file data on separate volumes
mkfs.xfs -l logdev=log_device -r rtdev=rt_device device
mount -o logdev=log_device,rtdev=rt_device device path
rt_device is the device for the file data, device is for the metadata
Receives limited testing and support in Linux
Note
Filesystems created with a realtime subvolume can only be mounted on kernels with CONFIG_XFS_RT enabled
