Storage Node Mode Adjustment During BBU Failure

The patent implements dynamic mode adjustment for storage nodes based on real-time BBU status monitoring. When a BBU fails, the system dynamically evaluates whether to switch the affected node to maintenance mode or keep it in write-back mode by checking peer node BBU status and cluster degradation state. This dynamic decision-making process allows the system to adapt its reliability measures to actual conditions, avoiding unnecessary performance degradation while maintaining data security when possible.

The patent employs a cost-effective strategy by conditionally maintaining nodes in write-back mode without requiring expensive additional hardware or complex mechanisms. The system uses existing cluster resources and simple status checks to determine when write-back mode can be safely maintained, effectively using low-cost monitoring and decision logic to avoid performance degradation while ensuring data consistency only when absolutely necessary.

The patent implements a feedback mechanism where the monitoring module continuously tracks BBU status of all nodes, and this status information feeds into the mode adjustment module. The system uses this feedback to automatically determine appropriate node modes without requiring complex manual intervention or sophisticated failure handling procedures. The feedback loop simplifies the overall system response to BBU failures by making the decision process automated and rule-based.