Cache Portion Reclassification for Data Sharing

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Solution Overview

Problem

Cache memory systems face inefficiencies in data management and sharing across multiple machines, leading to suboptimal performance and increased latency due to the lack of effective content-aware caching and reclassification mechanisms.

Innovation Solution

Implementing a method to reclassify a cache portion from a private to a public cache within a cache system, allowing content identifiers to be compared across machines, and updating directories to associate and share matching data portions, thereby enhancing data sharing and reducing redundant storage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If cache portions are assigned privately to individual machines, then data security and machine-specific performance are improved, but data sharing efficiency and cache utilization across multiple machines deteriorate

Engineering Contradiction:

Improvedata securityVSAvoiddata sharing efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The cache system is segmented into private cache portions (dedicated to specific machines) and public cache portions (shared across machines). This segmentation allows each machine to have guaranteed private storage while enabling efficient sharing of frequently accessed data through public portions, resolving the contradiction between data security and sharing efficiency.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The cache portion classification is dynamic rather than static. Cache portions can be reclassified between private and public states based on content characteristics, access patterns, and system conditions. This dynamic reclassification allows the system to adapt to changing requirements, maintaining security when needed while enabling sharing when beneficial.

Inventive Principle:

Principle #15Dynamics

2Productivity

If content identifiers are compared across all cache portions to identify matching data, then data sharing and deduplication are improved, but system complexity and processing overhead increase

Engineering Contradiction:

Improvedata sharingVSAvoidsystem complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The content identifier comparison process is optimized by focusing comparisons on relevant cache portions based on local characteristics. Rather than comparing against all cache portions uniformly, the system identifies and compares against specific portions most likely to contain matching data, reducing processing overhead while maintaining effective data sharing.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

A content directory structure serves as an intermediary that organizes and indexes content identifiers. This intermediary layer enables efficient comparison and matching by providing structured access to cache contents, reducing the complexity of direct pairwise comparisons across all cache portions.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Productivity

If cache portions are reclassified from private to public, then cache utilization and data sharing are improved, but cache management complexity and access control requirements increase

Engineering Contradiction:

Improvecache utilizationVSAvoidcache management complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The cache management system uses feedback from access patterns, content characteristics, and performance metrics to automatically make reclassification decisions. This feedback-driven approach reduces manual management complexity by enabling the system to self-optimize cache configuration based on observed usage patterns.

Inventive Principle:

Principle #23Feedback

4Measurement precision

If content identifiers are compared for every data access request, then data sharing accuracy is improved, but access latency and processing time increase

Engineering Contradiction:

Improvedata sharing accuracyVSAvoidaccess latency

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

Content identifiers are pre-computed and stored with cache entries during the data writing phase. When data is later retrieved, the pre-stored identifiers enable rapid comparison without requiring computation at access time, maintaining high accuracy while reducing access latency.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS9009416B1System and method for managing cache system content directories

Publication Date: 2015.04.14 EMC IP HLDG CO LLC

AI summary

A method, computer program product, and computing system for reclassifying a first assigned cache portion associated with a first machine as a public cache portion associated with the first machine and at least one additional machine after the occurrence of a reclassifying event. The public cache portion includes a plurality of pieces of content received by the first machine. A content identifier for each of the plurality of pieces of content included within the public cache portion is compared with content identifiers for pieces of content included within a portion of a data array associated with the at least one additional machine to generate a list of matching data portions. The list of matching data portions is provided to at least one additional assigned cache portion within the cache system that is associated with the at least one additional machine.