Disk Drive Power Management in Dispersed Storage Networks

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Solution Overview

Problem

Dispersed storage networks face challenges in reducing power consumption while maintaining uninterrupted client access to data collections, leading to increased energy costs and disk drive wear.

Innovation Solution

A method and system that continuously monitor namespace health parameters to selectively enable and disable power to storage disk drives based on power management rules, ensuring that disk drives are only powered off when not needed to service client requests, thereby reducing energy consumption and extending disk drive life.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If power is continuously supplied to all storage disk drives, then client access to data collections is maintained without disruption, but energy consumption increases and disk drive wear accelerates

Engineering Contradiction:

Improveclient access continuityVSAvoidenergy consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The system dynamically adjusts the power state of storage disk drives based on real-time monitoring of namespace health parameters and predicted client access patterns. Disk drives are transitioned between powered-on and powered-off states according to their current utility, allowing the system to adapt its energy consumption to actual workload conditions while maintaining data accessibility when needed.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system continuously monitors namespace health parameter data and uses this feedback to make informed decisions about power management. By analyzing current disk availability, client access patterns, and data collection requirements, the system adjusts power allocation to disk drives in real-time, ensuring that power is supplied only when necessary for maintaining client access while minimizing energy consumption during low-utilization periods.

Inventive Principle:

Principle #23Feedback

2Reliability

If power is continuously supplied to all storage disk drives, then uninterrupted client access to data collections is ensured, but disk drive lifespan decreases due to increased wear

Engineering Contradiction:

Improveaccess availabilityVSAvoiddisk drive lifespan

Core Design Contradiction:

ReliabilityVSDuration of action of stationary object

Solution Approach 1:

The system implements dynamic power management that adjusts disk drive operational states based on actual demand. By monitoring namespace health parameters and predicting client access needs, the system minimizes the time disk drives spend in high-wear operational states while ensuring they are available when required, thereby extending overall disk drive lifespan without compromising service availability.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system employs periodic monitoring and evaluation of disk drive usage patterns, enabling disk drives to enter low-power or offline states during periods of reduced utilization. This periodic activation and deactivation reduces cumulative wear on disk drives while maintaining the ability to provide uninterrupted client access when data collections require retrieval.

Inventive Principle:

Principle #19Periodic action

3Use of energy by moving object

If disk drives are selectively powered off to reduce energy consumption, then energy costs decrease, but client access to data collections may be disrupted

Engineering Contradiction:

Improveenergy consumptionVSAvoidclient access continuity

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The system performs preliminary analysis of namespace health parameters and predicted client access patterns before making power management decisions. By anticipating future access requirements based on monitored data, the system can proactively power down disk drives that are unlikely to be needed, reducing energy consumption while ensuring that disk drives required for upcoming client access operations remain powered on.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system uses real-time feedback from namespace health monitoring to dynamically adjust power allocation. By continuously assessing which disk drives are currently needed or predicted to be needed for client access, the system makes informed decisions about which drives can be safely powered down, thereby reducing energy consumption without disrupting client access to data collections that require active disk drives.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS11327670B2Reducing power consumption in a dispersed storage network

Publication Date: 2022.05.10 INTERNATIONAL BUSINESS MACHINE CORPORATION

AI summary

Systems and methods for selectively disabling power to disk drives in a distributed storage network (DSN). In embodiments, a method includes: monitoring namespace health parameter data in a DSN including a plurality of storage disk drives, wherein the namespace health parameter data includes available disks of the plurality of storage disk drives; determining that power to a subset of the plurality of storage disk drives can be disabled without disrupting anticipated client access to a data collection based on the monitoring and stored power management rules; and sending instructions to at least one power manager within the DSN to disable power to the subset of the plurality of storage disk drives, resulting in at least one disabled storage disk, wherein the instructions are based on the determining that power to the subset of the plurality of storage disk drives can be disabled.