Container-Based Storage Data Placement Using Slab Segmentation
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Solution Overview
Problem
Deduplicated data systems often compromise input/output performance due to the scattering of data segments across non-contiguous physical locations, which can lead to increased latency and resource wastage, offsetting the storage savings they provide.
Innovation Solution
The method involves logically dividing files into slabs and storing data segments from the same file in the same containers, allowing for efficient data placement and prefetching of containers during read operations to improve sequential read performance and reduce resource consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If data segments are scattered across non-contiguous physical locations for deduplication, then storage space is reduced, but input/output performance deteriorates
Solution Approach 1:
The file is divided into slabs (groups of consecutive data segments), and each slab is assigned to a specific container. This segmentation allows the system to maintain deduplication benefits while improving I/O performance by keeping related data segments together in the same container, reducing the number of containers that need to be accessed during read operations.
Solution Approach 2:
The system performs preliminary organization of data segments into slabs and assigns them to containers based on their logical continuity. This pre-organization ensures that when read operations occur, data segments from the same file are already positioned in the same container, eliminating the need for scattered access across multiple containers and thus improving I/O performance.
2Quantity of substance
If data segments from the same file are stored in different containers, then deduplication efficiency is improved, but read latency increases
Solution Approach 1:
By segmenting files into slabs and assigning each slab to a specific container, the system maintains deduplication efficiency (since segments are still individually tracked) while reducing read latency (since consecutive segments are now located in the same container, enabling sequential access without container switching).
Solution Approach 2:
The patent merges consecutive data segments into slabs and combines them into the same container. This merging preserves deduplication benefits at the segment level while improving read performance by ensuring that related segments are physically co-located, thus reducing the time required to read contiguous data.
3Quantity of substance
If data segments are distributed across multiple containers, then storage capacity utilization is improved, but resource consumption increases
Solution Approach 1:
The slab-based segmentation allows the system to efficiently utilize storage capacity by distributing slabs across multiple containers while reducing resource consumption. By organizing segments into slabs first, the system minimizes the overhead of managing individual segments across containers, thus improving storage utilization without proportionally increasing resource consumption.
Solution Approach 2:
The preliminary organization of segments into slabs and their assignment to containers reduces the computational overhead during read operations. This pre-organization allows the system to efficiently utilize storage capacity while minimizing the resources required for data retrieval, as the mapping between segments and containers is already established.
Data Source
AI summary
The disclosed computer-implemented method for data placement in container-based storage systems may include (i) identifying a file stored within a container-based storage system, where the container-based storage system stores the file as data segments within containers, (ii) receiving, in response to a write operation directed to the file, a request to store within the container-based storage system a new data segment generated by the write operation, (iii) describing the file in terms of a plurality of consecutive slabs, (iv) determining that the new data segment falls within a specified slab, and (v) fulfilling the request to store the new data segment within the container-based storage system by storing the new data segment in a designated container that corresponds to the specified slab in response to determining that the new data segment falls within the specified slab. Various other methods, systems, and computer-readable media are also disclosed.