Virtual Service Provider Isolation in Partitioned Systems
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Solution Overview
Problem
In virtual machine environments, achieving effective isolation and fault tolerance between partitions is challenging, particularly when one partition acts as a provider of resources to others, as faults in the provider partition can propagate and affect dependent client partitions, leading to increased instability and security risks.
Innovation Solution
Implementing a system where a virtual service provider is placed in a dedicated partition generated by a root partition, allowing for isolation and recovery of the service provider partition, and using chained virtual service providers to ensure that faults in lower-order partitions do not affect higher-order partitions, with redundancy and aggregation of services to handle large client loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a virtual service provider is placed in a shared partition environment, then resource utilization and service aggregation are improved, but fault isolation and system stability deteriorate as faults can propagate to client partitions
Solution Approach 1:
The system segments the virtual service provider into multiple isolated partitions, each capable of independent operation. When a fault occurs in one partition, it remains contained and does not propagate to other partitions or client virtual machines, thus maintaining both resource utilization and fault isolation.
Solution Approach 2:
The patent introduces a virtualization layer as an intermediary between the virtual service provider and client partitions. This intermediary manages resource allocation and enforces isolation boundaries, allowing efficient resource sharing while preventing fault propagation through controlled access mechanisms.
2Reliability
If partitions are tightly isolated for fault tolerance, then system stability is improved, but resource sharing and service connectivity worsen
Solution Approach 1:
The virtualization layer serves as a mediator that enables controlled resource sharing between isolated partitions. It provides standardized interfaces and management mechanisms that allow partitions to access required resources while maintaining isolation boundaries, thus achieving both stability and adaptability.
Solution Approach 2:
The patent creates a universal virtualization infrastructure that can serve multiple partitions with different resource requirements. This multi-functional platform provides standardized resource access mechanisms that work across all isolated partitions, enabling flexible resource sharing without compromising isolation.
3Reliability
If a provider partition fails, then service availability for that partition drops, but without isolation the failure propagates to affect all dependent client partitions
Solution Approach 1:
By segmenting the virtual service provider into isolated partitions, the system ensures that failures remain contained within the affected partition. Other partitions and client virtual machines continue to operate normally, maintaining overall service availability while achieving fault containment.
Solution Approach 2:
The patent implements redundancy mechanisms where backup virtual service provider instances are prepared in advance in separate partitions. When a partition fails, the system can quickly switch to the backup instance, cushioning the impact and maintaining service availability without propagating the failure.
Data Source
AI summary
A method of managing resources in a host computer includes generating a virtual service provider in two different computer partitions and linking them in a serial manner. The virtual service providers are associated with a computer resource. Virtual service clients in different partitions may use the virtual service provider software to access the related computer resources. The virtual service providers provide a transparent interface to the associated hardware. Virtual service clients can use the combination of series computer resource functions or can access the a lesser number of the series connected virtual service providers. Fault tolerance can be built into the scheme using multiple virtual service providers located in different partitions accessible to virtual service clients using a failover control technique.