Storage Management Device Disk Distribution Ratio Adjustment
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Solution Overview
Problem
Conventional storage management technologies face challenges in accurately adjusting the distribution ratio of disks with different performance levels, leading to insufficient performance adjustments, especially when using automated tiering and Quality of Service (QoS) settings, as they fail to consider the distribution ratio of disks and cache adjustments effectively.
Innovation Solution
A storage management device that calculates a target performance value based on a fixed distribution ratio for each type of storage unit, determines a distribution ratio for each type of storage unit, and adjusts bandwidth accordingly to optimize data transfer performance across different disk types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional technology calculates target performance using distribution ratio of actual measurement, then performance adjustment is performed, but the difference between calculated target performance and actual measurement distribution ratio occurs due to performance ratio difference of disks, resulting in insufficient adjustment
Solution Approach 1:
The patent replaces the conventional mechanical calculation method (using actual measurement distribution ratios) with a new computational approach that uses fixed distribution ratios and performance ratios of disk types. This substitution allows the system to calculate target performance values that accurately reflect the intended disk distribution, eliminating the insufficiency caused by performance ratio differences between disk types.
Solution Approach 2:
The patent changes the parameters used for performance calculation from actual measurement distribution ratios to fixed distribution ratios combined with performance ratios of each disk type. This parameter change enables precise control over the distribution ratio adjustment, allowing the system to achieve the target performance distribution accurately despite differences in individual disk performance characteristics.
2Productivity
If automated tiering storage is used to store frequently used data in high speed disks and less frequently used data in low speed disks, then high-capacity high-speed storage devices are implemented at low cost, but the distribution ratio of disks cannot be appropriately adjusted
Solution Approach 1:
The patent introduces dynamic adjustment of disk distribution ratios based on performance requirements. The storage management device can flexibly change the distribution ratio of disks according to the target performance value, allowing the system to adapt to different workload requirements while maintaining cost-effectiveness through automated tiering.
Solution Approach 2:
The patent enables dynamic parameter changes in the disk distribution ratio by calculating target performance values using fixed distribution ratios and performance ratios. This allows the system to adjust the distribution ratio appropriately for different storage scenarios while maintaining the benefits of automated tiering storage.
3Power
If band limit width adjustment is performed to satisfy calculated target performance, then performance adjustment is attempted, but only insufficient adjustment is performed on band limit width while distribution ratio of disks remains almost the same as actual measurement
Solution Approach 1:
The patent segments the performance adjustment process into two independent control dimensions: band limit width adjustment and distribution ratio adjustment. The storage management device can independently control each parameter based on the target performance value, allowing precise adjustment of both bandwidth allocation and disk distribution ratio without one affecting the other.
Solution Approach 2:
The patent enables independent parameter changes for both band limit width and distribution ratio. By calculating the target performance value using fixed distribution ratios and performance ratios, the system can determine the appropriate band limit width and distribution ratio separately, ensuring both parameters are optimally adjusted to meet performance requirements.
4Productivity
If conventional technology adjusts amount of data passing through multipath channel, then performance adjustment is performed, but distribution ratio of disks is not considered, making it difficult to appropriately adjust distribution ratio
Solution Approach 1:
The patent segments the performance control into separate dimensions: data transfer amount through multipath channels and disk distribution ratio. The storage management device independently controls the distribution ratio based on target performance values, while band limit width controls the data transfer amount, allowing both parameters to be optimized without interference.
Solution Approach 2:
The patent introduces parameter changes for disk distribution ratio that are independent of multipath channel data transfer adjustment. By calculating target performance using fixed distribution ratios and performance ratios, the system can appropriately adjust the distribution ratio parameter while maintaining control over data transfer performance through band limit width.
Data Source
AI summary
A receiving unit receives an input of information of a performance level with respect to a volume that is allocated by using different types of disks. A target value calculating unit calculates, on the basis of a distribution ratio that is previously determined for each type of the disks, a target value of the performance of sending and receiving data to and from the volume. On the basis of the target value calculated by the target value calculating unit, a performance management unit determines a distribution ratio for each type of the disks allocated to the volume, determines a band distribution with respect to the volume, and instructs the storage device to re-allocate the volume by using the determined distribution ratio and adjust the bandwidth in accordance with the determined band distribution.