Remote Shared Virtual Disk Snapshot Creation

摘要

A storage system creates a snapshot of a virtual hard disk by switching an I/O request target for the virtual hard disk. A requestor may issue requests to the storage system requesting that specific operations of the process should be performed. A request may specify that more than one operation should be performed in one operation. After initializing a new virtual hard disk file, I/O requests directed to a target virtual hard disk file are held for later deliver. The I/O request target is switched from the target to the new virtual hard disk file. I/O requests are unblocked and the stored requests are delivered to the new virtual hard disk file. Additional I/O requests sent to the target virtual hard disk file may be redirected to the new virtual hard disk file.

主权项

1. A system for creating a snapshot of a virtual hard disk, comprising:
at least one processor; and memory, operatively connected to the at least one processor and containing instructions that, when executed by the at least one processor, perform a method, the method comprising: opening a handle to a virtual hard disk set file; accessing the virtual hard disk using the handle, wherein the virtual hard disk comprises a first virtual hard disk file, and wherein accessing the virtual hard disk comprises writing at least a first sector of data to the virtual hard disk; requesting creation of a snapshot of the virtual hard disk file, wherein the snapshot comprises the first sector of data; after the snapshot of the virtual hard disk is created, accessing the virtual hard disk using the handle, wherein accessing the virtual hard disk comprises writing at least a second sector of data to the virtual hard disk.