Amazon 又把一個大部門的 Oracle 系統轉移到了 AWS 自家的系統

算是 AWS 的 PR 稿,在老闆對雲的宣示與政治正確下本來就會陸陸續續轉過去...

這次是 Amazon 的 Consumer Business 從 Oracle 的系統換到 AWS 自己的系統:「Migration Complete – Amazon’s Consumer Business Just Turned off its Final Oracle Database」。

原先有 75 PB 的資料與 7500 個 database:

We migrated 75 petabytes of internal data stored in nearly 7,500 Oracle databases to multiple AWS database services including Amazon DynamoDB, Amazon Aurora, Amazon Relational Database Service (RDS), and Amazon Redshift.

其中一個優點是省成本,但是也投入了超過一百個團隊一起參與轉移,會需要攤多久才會打平,這點在沒有看到內部財務資料其實沒辦法判斷,而且工程資源的稀缺性也是個沒有被看到的資訊:

Cost Reduction – We reduced our database costs by over 60% on top of the heavily discounted rate we negotiated based on our scale. Customers regularly report cost savings of 90% by switching from Oracle to AWS.

More than 100 teams in Amazon’s Consumer business participated in the migration effort.

然後 latency 的下降其實也只能參考,因為轉移系統的時候也會順便改寫,有多少是因為 AWS 服務本身帶出來,在沒有內部資料看不出來:

Performance Improvements – Latency of our consumer-facing applications was reduced by 40%.

管理成本算是裡面唯一可以參考的,畢竟是搬到可延展擴充的服務:

Administrative Overhead – The switch to managed services reduced database admin overhead by 70%.

另外,沒寫的東西比較有趣,像是他們沒有選擇 Athena 而是用 Redshift,看起來像是先轉上去,其他找機會再說...

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