給自己 2022 年的新目標 – AWS Certified Developer Associate 的學習筆記。這篇筆記下 EBS Volume Types & Multi-Attach 的相關資訊。
課程相關資訊
[連結]：https://www.udemy.com/course/aws-certified-developer-associate-dva-c01/learn/lecture/26100964
本篇範圍：Chapter 6
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. EBS Volume Types 可照 Size, IOPS, Throughput 分為 gp2, gp3, io1, io2, st1, sc1 六種
2. gp2, gp3, io1, io2 才可當作開機碟
3. GP 系列，可用於開機碟、虛擬桌面、開發或是測試環境
4. IOPS SSD ( IO 系列 )，能夠負載的 IOPS 數量較大 ( over 16000 )，適合用來進行資料庫存取
5. st1 和 s1 為 HDD，前者適合用於 Big Data, Data Warehouse, log processing；後者則為相當少存取的資料，價格也是最低的
6. 基本上，一個 EBS Volume 僅能接上一個 EC2，但 iO1 和 iO2 可以接上同一個 AZ 內的多個 EC2，每個 EC2 有自己的權限。
7. EBS Multi-Attach 會因為 EC2 的檔案系統規格而影響能否啟用此功能。若沒有 cluster-aware 的 File System ( 如 XFS,EX4 ) 便無法使用。
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