Control Device Suspend Resume Access Test Power Conservation
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Solution Overview
Problem
In data centers with numerous storage devices, power conservation efforts face challenges due to increased startup times and potential failure detection delays during suspend/resume operations, leading to performance degradation and reliability issues.
Innovation Solution
A control device with a processor and memory that obtains and gives back control rights for memory devices, conducts access tests, and manages suspend/resume operations to optimize power conservation and reduce startup times while ensuring reliable node transitions between active and inactive states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If suspend/resume operations are implemented for power conservation, then energy consumption is reduced, but startup time increases and reliability decreases due to failure detection delays
Solution Approach 1:
The patent implements preliminary actions by conducting access tests to failure detection and executing suspend/resume operations in a predetermined sequence before actual suspend/resume operations. This preliminary testing ensures that failure detection mechanisms are verified and functional before the system enters low-power state, thereby maintaining reliability while enabling power conservation.
Solution Approach 2:
The patent segments the suspend/resume operation into distinct phases: failure detection phase, access test phase, and actual suspend/resume phase. By dividing the operation into separate test and execution phases, the system can verify functionality before committing to the power state transition, resolving the contradiction between power conservation and reliability.
2Reliability
If access tests are conducted before resume operations, then reliability is improved, but startup time increases
Solution Approach 1:
Access tests are performed as preliminary actions before the actual resume operation. By conducting these tests in advance while the system is still in active state or during the transition phase, the patent ensures that reliability is verified without significantly extending the critical resume time that impacts system availability.
Solution Approach 2:
The patent implements periodic access tests at predetermined intervals during the resume process. This periodic approach allows the system to verify functionality at key checkpoints without continuously testing, thereby balancing reliability verification with minimizing startup time overhead.
Data Source
AI summary
A control device includes: a memory; and a processor, coupled to the memory, configured to perform operations to: obtain a first control right that is an exclusive right used to control a first memory device and first memory device information on a configuration of the first memory device, from another control device having the first control right when an operation suspend instruction to the another control device occurs; give back the first control right to the another control device after obtaining the first control right and the first memory device information; and conduct a first access test of the first memory device after giving back the first control right.