Virtual Machine State Preservation During Kernel Crash
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Solution Overview
Problem
The crash of a host machine can cause a virtual machine to fail, leading to data loss and service disruptions, as existing technologies lack effective mechanisms for preserving virtual machine data and status information during kernel crashes.
Innovation Solution
A method and apparatus that acquire virtual machine device status information and physical address information from a target memory, generate snapshot files, and store them in a shared storage area, enabling recovery of the virtual machine by sending a recovery request to a backup device, thus preventing data loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the production kernel crashes, then the virtual machine stops running and services are disrupted, but data loss and system instability occur
Solution Approach 1:
The patent pre-allocates target memory to store virtual machine device status information and physical address information before kernel crashes occur. This preliminary preparation ensures that critical data is already in a recoverable state, allowing the system to restore the virtual machine after a crash without data loss
Solution Approach 2:
The patent creates a copy of the virtual machine's memory state by storing device status information and physical address information in target memory. This copying mechanism preserves the virtual machine's state independently of the production kernel, enabling recovery even when the original kernel crashes
2Reliability
If the host machine crashes, then the virtual machine becomes unavailable, but service continuity is compromised
Solution Approach 1:
The system pre-allocates target memory and stores critical virtual machine information before crashes occur. This preliminary preparation enables rapid recovery by having all necessary data ready in advance, significantly reducing downtime and maintaining service continuity
Solution Approach 2:
The patent introduces target memory as an intermediary storage layer between the virtual machine and the production kernel. This intermediary preserves virtual machine state independently, allowing recovery without waiting for host machine restoration, thus maintaining service continuity
Data Source
AI summary
Embodiments of the present disclosure relate to a method and apparatus for processing information. The method can include: acquiring virtual machine device status information and physical address information from a target memory in response to determining a crash of a production kernel, the target memory being a memory pre-allocated to a running virtual machine by the production kernel, and the virtual machine device status information of the virtual machine and the physical address information corresponding to a virtual address of the memory of the virtual machine being stored into the target memory by the production kernel; acquiring data as target data according to the physical address information; and storing a file into a shared storage area according to the target data and the virtual machine device status information.