High performance with respect to reads and writes was achieved by using RAID0 with EBS provisioned IOPS volumes. To get more throughput per volume, 5 volumes of 4TB each were used, instead of 1 big volume. This was to facilitate faster snapshots and restores.
LVM to manage two Logical Volume’s (DB and DRBD Metadata) within single Volume Group.
可以看到裡面用的都是很經過時間考驗的技術，像是 DRBD、標準的 Replication 架構...