[筆記] Ultimate AWS Certified Developer Associate (25)

給自己 2022 年的新目標 – AWS Certified Developer Associate 的學習筆記。這篇筆記下 Auto Scaling Group 的 Scailing Policies。
notes-ultimate-aws-certified-developer-associate-1


課程相關資訊

[連結]:https://www.udemy.com/course/aws-certified-developer-associate-dva-c01/learn/lecture/19733728

本篇範圍:Chapter 7

請注意:本系列文章為個人對應課程的消化吸收後,所整理出來的內容。換言之,並不一定會包含全部的課程內容,也有可能會添加其他資源來說明。


內容

1. 關於 Dynamic Scaling,可以分為 Target Tracking (例如 CPU 保持在 40% ) 和 Step Scaling ( 例如當 CPU 用量大於 70%,增加兩個單位;當 CPU<30%,減少 1 個單位 )
2. Scheduled Actions:排程進行
3. Predictive Scaling
4. Good metrices to scale on:CPUUtilization, RequestCountPerTarget, Average Network In/Out, Using CloudWatch to trigger
5. 每次進行 Scaling 活動時,會有一個 cooldown period 的產生 ( 預設為 300 秒 )。如果此時有其他的 Scaling 活動要觸發,會予以忽略


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