虛擬機器備援方法及系統

數位科技應用於產業發展計畫

一種虛擬機器備援方法，包括以第一主機執行：擷取虛擬機器對硬碟映像檔的寫入請求，其中寫入請求包含寫入資料、輸入位置資訊及輸出位置資訊，將寫入資料複製到第一主機的資料暫存區，將對應寫入資料的第一鍵值、輸入位置資訊及輸出位置資訊存入第一資源位置結構，暫停虛擬機器的運作，並根據第一資源位置結構及第一鍵值與對應於既存資料的第二鍵值的比較結果產生第二資源位置結構，以及根據第二資源位置結構輸出備援資料組至第二主機，備援資料組在第一鍵值與第二鍵值相同時包括第二資源位置結構及既存資料與寫入資料中的僅一者。

A virtual machine backup method includes, performed by a first host: extracting a writing request from a virtual machine to a disk image file, wherein the writing request includes writing data, input location information and output location information, copying the writing data to a temporary storage area of the first host, calculating a first key of the writing data, storing the first key, the input location information and the output location information into a first resource location structure, pausing an operation of the virtual machine and generating a second resource location structure according to the first resource location structure and a comparison result between the first key and a second key corresponding to the input location information, wherein the key corresponds to existing data in the temporary storage area, and output a backup data group to a second host according to the second resource location structure, for the second host to generate a copy of the virtual machine and a copy of the disk image file, wherein the backup data group includes the second resource location structure and only one of the existing data and the writing data when the first key and the second key are the same.