Storage Management Prioritizing Logical Volume Startup
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Solution Overview
Problem
Existing storage systems face challenges in balancing power saving and readiness for access, particularly when the power supply unit's capacity is insufficient to start all hard disks simultaneously, leading to prolonged startup times and inadequate access readiness.
Innovation Solution
A storage management apparatus that prioritizes logical volumes based on priority information, selectively starting them using a power supply unit capable of determining the necessary power requirements, ensuring that higher-priority volumes are activated first to improve access readiness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the power supply unit is designed to supply power for simultaneously starting all hard disks, then the power supply capability is sufficient for simultaneous startup, but the power supply unit becomes larger, more expensive, and consumes more power
Solution Approach 1:
The system performs preliminary assessment of power requirements by calculating the sum of starting power values for all hard disks before attempting startup. This allows the system to determine in advance whether simultaneous startup is feasible given the power supply unit's limited capacity, avoiding the need to design for maximum possible power requirements.
Solution Approach 2:
The system dynamically adjusts the startup strategy based on real-time power availability. When simultaneous startup of all disks exceeds power supply capability, the system automatically transitions to sequential or grouped startup modes, adapting the startup sequence to match the actual power supply constraints.
2Reliability
If hard disks are divided into groups and started at different timings, then the power supply unit can handle the load, but the time until full system readiness increases
Solution Approach 1:
The system dynamically determines the optimal number of disks to start simultaneously by calculating the ratio of total starting power to power supply capability. This dynamic adjustment allows the system to maximize parallel startup within power constraints, reducing overall readiness time compared to fixed sequential grouping.
Solution Approach 2:
The system changes operational parameters by using different starting power values for different hard disks based on their characteristics. This allows more power-efficient disks to be started simultaneously while reserving power for high-power disks, optimizing the balance between parallel startup and power consumption.
3Loss of time
If all hard disks are started simultaneously, then the system achieves full readiness quickly, but the power supply unit must be oversized and expensive
Solution Approach 1:
The system performs preliminary calculations of power requirements and startup feasibility before actual startup. By assessing whether simultaneous startup is possible within power constraints, the system can quickly proceed with parallel startup when feasible, achieving fast readiness without requiring oversized power supply units.
Solution Approach 2:
The system transitions from static power supply design to dynamic power management. Instead of designing the power supply unit for maximum possible simultaneous startup, the system dynamically controls the startup process to match the actual power supply capacity, reducing hardware complexity while maintaining readiness performance.
4Loss of energy
If the power supply unit has limited capacity, then power consumption and cost are reduced, but the system cannot start all hard disks simultaneously
Solution Approach 1:
The system dynamically optimizes the balance between power consumption and productivity by calculating the maximum number of disks that can be started simultaneously within power constraints. This allows the system to achieve the highest possible productivity given the limited power capacity, rather than operating in a fixed sequential mode.
Solution Approach 2:
The system changes the startup parameters by assigning different starting power values to different hard disks based on their individual characteristics. This allows the system to maximize the number of disks started in parallel while staying within power limits, improving productivity without increasing power consumption.
Data Source
AI summary
A storage management apparatus includes a memory for storing logical volume information for indicating logical volumes and priority information for determining an order of the logical volumes to be activated, a first interface for connecting storages to the storage management apparatus, at least one of the storages corresponding to one of the logical volumes, a second interface connected to a power supply unit for supplying power to the storages, and a processor for executing determining whether the power supply unit is capable of supplying power for simultaneously starting the storages corresponding to the logical volumes corresponding to an access request for accessing the logical volumes, selecting one logical volume based on the priority information when the power supply unit is incapable of supplying power for simultaneously starting the storages, and transmitting a start request for staring the storages corresponding to the selected logical volume by using the first interface.