How to set up a RAID 10 array on top of EBS using LVM and XFS as the file system.
Create RAID10 array
4 Disks of 8 GB Each – 16 Gigs available for use
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$ mdadm --verbose --create /dev/md0 --level=10 --chunk=256 --raid-devices=4 /dev/sdf1 /dev/sdf2 /dev/sdf3 /dev/sdf4 $ blockdev --setra 65536 /dev/md0 # [3] $ mdadm --detail --scan >> /etc/mdadm/mdadm.conf #16 GB is not a lot of space, You will have to increase this space as your DB grows. For that we need LVM. # Create a physical volume $ pvcreate /dev/md0 # Create a volume group $ vgcreate VOL_GRP_NAME /dev/md0 # Check available Free Physical Extents (Free PE), use that number in next command $ vgdisplay VOL_GRP_NAME $ lvcreate --name LOGICAL_VOL_NAME --extents FREE_PE VOL_GRP_NAME # Create file system $ mkfs.xfs -f /dev/VOL_GRP_NAME/LOGICAL_VOL_NAME # Mount newly created partition $ mount -t xfs -o noatime,noexec,nodiratime /dev/VOL_GRP_NAME/LOGICAL_VOL_NAME /MOUNT_POINT/ # Put an /etc/fstab entry so the partition will mount automatically if you reboot. $ echo "/dev/VOL_GRP_NAME/LOGICAL_VOL_GRP /MOUNT_POINT xfs noatime,noexec,nodiratime 0 0" >> /etc/fstab # When you want to increase the size of an array, create another RAID10 array /dev/md1 # Extend Volume Group $ vgextend VOL_GRP_NAME /dev/md1 # Extend Logical Volume $ lvextend -l +100%FREE /dev/VOL_GRP_NAME/LOGICAL_VOL_NAME # Finally you may extend the file system on it $ xfs_growfs /MOUNT_POINT |