這次要提的是「Netflix Billing Migration to AWS」、「Netflix Billing Migration to AWS - Part II」與「Netflix Billing Migration to AWS - Part III」這三篇。
Netflix 先前的金流相關系統跑的是 Oracle 的資料庫：
然後換成 MySQL：
系統上是採用 DRBD，然後底層是 5 個 4TB 的 EBS 組成的 RAID 0，跑 LVM：
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...