AWS Auto Scaling 常見問題
問:何時應使用 AWS Auto Scaling?何時又該使用 Amazon EC2 Auto Scaling?
您應該使用 AWS Auto Scaling 來管理跨多項服務的多個資源的擴充套件。藉助 AWS Auto Scaling,您可以使用預定義的擴充套件策略為多個 EC2 Auto Scaling 組或其他資源定義動態擴充套件策略。與通過單個服務控制檯管理每個資源的擴充套件策略相比,使用 AWS Auto Scaling 為應用程式中的所有可擴充套件資源配置擴充套件策略會更快,同時也更加輕鬆,因為 AWS Auto Scaling 包含可簡化擴充套件策略設定的預定義擴充套件策略。
如果您只需要擴充套件 Amazon EC2 Auto Scaling 組,或只想維持 EC2 佇列的執行狀況,則應該使用 EC2 Auto Scaling。如果您需要建立或配置 Amazon EC2 Auto Scaling 組,或者需要設定計劃或分步擴充套件策略(因為 AWS Auto Scaling 僅支援目標跟蹤擴充套件策略),也應該使用 EC2 Auto Scaling。
必須在 AWS Auto Scaling 之外建立和配置 EC2 Auto Scaling 組,例如通過 EC2 控制檯,Auto Scaling API或通過 CloudFormation。AWS Auto Scaling 可幫助您為現有的 EC2 Auto Scaling 組配置動態擴充套件策略。
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