AWS 推出 RDS for Db2 以及 Amazon Aurora Limitless Database

資料庫的部分,看到 AWS 在這次 re:Invent 放出「Getting started with new Amazon RDS for Db2」與「Join the preview of Amazon Aurora Limitless Database」這兩則消息。

首先是看到 Db2 這個詞覺得怪,查了以後發現原來是 2017 年改過名字正式的拼法:

The brand name was originally styled as DB/2, then DB2 until 2017 and finally changed to its present form.

這個消息比較像是補產品線,最大的資訊其實是查資料知道 2017 年改成 Db2...

另外的新產品 Amazon Aurora Limitless Database 就比較特別了,我翻了一下先前的 Amazon Aurora Serverless,是屬於利用 read replica 拓展「讀」的承載能力:

Amazon Aurora Serverless is an on-demand, autoscaling configuration for Amazon Aurora. It automatically starts up, shuts down, and scales capacity up or down based on your application's needs.

這次在 Amazon Aurora Limitless Database 裡面直接提到 sharding 技巧了,這就有機會拓展「寫」的承載能力:

Shards are Aurora PostgreSQL DB instances that each store a subset of the data for your database, allowing for parallel processing to achieve higher write throughput. Transaction routers manage the distributed nature of the database and present a single database image to database clients.

這次 preview 推出的是 PostgreSQL 15 的版本:

The preview runs in a new Aurora PostgreSQL cluster with version 15 in the AWS US East (Ohio), US East (N. Virginia), US West (Oregon), Asia Pacific (Tokyo), and Europe (Ireland) Regions.

這代表 database schema 不要設計的太差,是蠻有機會讓 RDS 幫你處理 sharding 底層所有需要的細節?等後續價錢出來可以看看... (應該是 open/public preview 或是 open beta 的階段)

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