To make the space available, you need to use the xfs_growfs command as the filesystem on your logical volume is xfs.
If it were ext2, ext3, or ext4, then you'd use resize2fs with the name.
EDIT: It appears to have been changed in its latest release for Fedora and RHEL 8 and CentOS 8. Using the lv/block device works in RHEL 7 and CentOS 7 but ...
Instead of adding disks on the level of operation system you can do this directly in hadoop. You can add them to the dfs.datanode.data.dir property. The format is
I am not 100% sure hadoop can ...