Dynamic Logical Segment Migration for Storage Hot Spot Resolution
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Solution Overview
Problem
Storage systems face performance degradation due to 'hot spots' in logical arrays, where certain areas are accessed excessively, leading to increased latency and inefficient use of storage resources.
Innovation Solution
An apparatus and method that dynamically migrate logical segments from overutilized arrays to underutilized ones, using modules for organization, identification, and migration, ensuring continuous data availability and transparent operations to the host, thereby reducing access to hot spots and improving storage hierarchy utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If logical segments are concentrated in fewer logical arrays to simplify storage organization, then storage management becomes easier, but access latency increases due to hot spots
Solution Approach 1:
The patent divides storage data into logical segments that can be independently managed and migrated. By segmenting the storage space into smaller units, the system can redistribute data across multiple logical arrays to eliminate hot spots while maintaining manageable organization through the segmentation architecture
Solution Approach 2:
The patent implements dynamic migration of logical segments between logical arrays based on access patterns. The system continuously monitors and adjusts data placement, migrating segments from overloaded arrays to underutilized ones, making the storage organization adaptive rather than static
2Loss of time
If data is distributed across multiple logical arrays to improve access performance, then latency decreases, but system complexity increases
Solution Approach 1:
The patent implements self-service through automated monitoring and migration of logical segments. The system autonomously identifies hot spots and performs data redistribution without requiring complex manual intervention, reducing operational complexity while maintaining performance benefits
Solution Approach 2:
The patent changes the organizational parameters of logical arrays dynamically, adjusting data placement based on access patterns. By modifying parameters such as segment location and array assignment, the system optimizes performance without requiring fundamental structural changes
3Loss of time
If logical segments are migrated from overutilized arrays to underutilized arrays to reduce hot spots, then access latency improves, but data availability during migration may be affected
Solution Approach 1:
The patent performs preliminary actions by establishing migration pathways and preparing target logical arrays before actual data transfer. This advance preparation ensures that data can be quickly made available in the destination array, minimizing disruption to data availability during the migration process
Data Source
AI summary
An apparatus, system, and method are disclosed for relocating logical array hot spots. An organization module organizes a plurality of logical arrays. Each logical array comprises a plurality of logical segments from a plurality of storage devices and configured to store data. An identification module identifies a hot spot on a first logical array if accesses to the first logical array exceed an access threshold. A migration module dynamically migrates a first logical segment from the first logical array to a second logical segment of a second logical array, wherein the migration is transparent to a host and data of the first logical segment is continuously available to the host.