• Choose ambari node
• Find disks (parted -l or fdisk -l will show /dev/xvd* disks attached)

/dev/xvdb1  +20G  /usr/hdp
/dev/xvdb2  +20G  /hadoop
/dev/xvdb3  Remainder  /data

• mkfs.ext4 /dev/xvdb*
• Setup FS (/usr/dhp 20GB + /hadoop 20GB)

/dev/xvdb1       /usr/hdp    ext4    defaults,noatime 1       2
/dev/xvdb2       /hadoop    ext4    defaults,noatime 1       2
/dev/xvdb3       /data    ext4    defaults,noatime 1       2

• Setup keys (copy .ssh/id_rsa.pub content to authorized_keys on other servers)

ssh-keygen

• Push latest Oracle JDK and JCE to /hadoop.