Storage System Deduplication Area Segmentation
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Solution Overview
Problem
In storage systems with deduplication functions, it is challenging to quickly recover and copy data sets between storage areas due to the need to determine duplicate and individual data sets, which complicates the process of updating reference destinations and managing free space effectively.
Innovation Solution
The system introduces a common area and individual area within logical storage layers, where duplicate data sets are stored in a common area and individual data sets are stored in an individual area, enabling efficient duplication determination and rapid recovery and copying of data sets by associating data sets with appropriate storage areas based on their duplication status.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If deduplication function is implemented to reduce data amount, then storage efficiency is improved, but the complexity of determining duplicate and individual data sets increases
Solution Approach 1:
The storage area is segmented into a first area for storing duplicate data sets and a second area for storing individual data sets. This segmentation allows the system to efficiently manage and identify duplicate versus individual data sets by their physical location, reducing the complexity of determination while maintaining deduplication effectiveness.
2Quantity of substance
If mixed storage of duplicate and individual data sets is used, then storage space utilization is improved, but the speed of recovering and copying data sets decreases
Solution Approach 1:
The storage area is divided into distinct first and second areas for duplicate and individual data sets respectively. This spatial separation enables rapid identification and retrieval of data sets based on their location, significantly improving recovery and copying speed while maintaining effective storage space utilization through dedicated regions.
3Reliability
If reference destinations are updated for all logical addresses when copying duplicate data sets, then data consistency is improved, but the time required for copying increases
Solution Approach 1:
By segmenting the storage area into distinct regions for duplicate and individual data sets, the system can efficiently manage reference destinations. When copying, the system leverages the structured layout to update references more effectively, maintaining data consistency across logical addresses while reducing overall copying time through organized data placement.
Data Source
AI summary
A computer system connected to an external computer issuing a data input/output request and a storage device, includes a logical storage area of a first layer of the storage device and a logical storage area of a second layer of the external computer. The logical storage area of the first layer includes a common area and an individual area. A storage area of the common area is associated with one or more of the second layer's logical storage areas. A storage area of the individual area is associated with one storage area of the second layer's logical storage area. The computer system performs duplication determination on a plurality of data sets and associates a plurality of data sets determined as being duplicated with the common area to associate the storage area of the common area with a plurality of storage areas of the logical storage area of the second layer.