Hole Punching in Deduplication for Storage Efficiency
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Solution Overview
Problem
Current deduplication solutions rely heavily on defragmentation processes, which are CPU and I/O bound, and inefficient in managing fragmented data, especially in scenarios where data is frequently modified or deleted, leading to performance issues and increased storage requirements.
Innovation Solution
The method involves punching holes in fragmented files during the deduplication process to reclaim space, allowing the file system to allocate it to a free space pool, thereby avoiding defragmentation and improving storage efficiency without the need for physical reorganization of data chunks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If defragmentation processes are used to manage fragmented data, then data organization is improved, but CPU and I/O resources are consumed excessively
Solution Approach 1:
The patent extracts the problematic defragmentation step from the deduplication process by using hole punching to directly reclaim space from fragmented files. Instead of moving data chunks to defragment, the system punches holes in deduplicated files to free up space, eliminating the need for CPU and I/O intensive defragmentation operations while maintaining data organization.
Solution Approach 2:
The patent inverts the traditional approach by not trying to consolidate fragmented data through defragmentation, but rather by punching holes in the fragmented files to reclaim space. This reverse approach avoids the resource-intensive process of moving data while achieving the same goal of improving data organization and freeing storage space.
2Quantity of substance
If traditional deduplication methods are used, then storage efficiency is improved, but file system performance deteriorates due to defragmentation overhead
Solution Approach 1:
The patent removes the performance-deteriorating defragmentation overhead from the deduplication process. By extracting the space reclamation function into a separate hole-punching operation, the system maintains storage efficiency benefits of deduplication while eliminating the file system performance penalty associated with traditional defragmentation methods.
Solution Approach 2:
The patent performs hole punching as a preliminary action during the deduplication process itself, rather than requiring a separate defragmentation step afterward. This preliminary reclamation of space prevents fragmentation from affecting file system performance while maintaining the storage efficiency gains from deduplication.
3Speed
If data chunks are physically reorganized through defragmentation, then data accessibility is improved, but storage requirements increase due to temporary space needs
Solution Approach 1:
The patent extracts the space reclamation function from the data reorganization process. Instead of physically moving data chunks which requires temporary storage space, the system punches holes in deduplicated files to directly reclaim space, eliminating temporary storage requirements while maintaining data accessibility through the file system's natural handling of punched-hole spaces.
Data Source
AI summary
For defragmentation-less deduplication using a processor device, holes are punched in a file in a data deduplication process for avoiding the use of defragmenting by allowing a file system to use the punched holes for reclaiming the free space for adding to a free space pool of the file system.