Logical Volume Construction for Multi-Host Read/Write Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing data storage technologies, such as LVM and CLVM, are limited in implementing read/write control of logical volumes across multiple hosts without requiring a file system, failing to meet the 'write once read many' requirement at a global level.
Innovation Solution
A method and apparatus for constructing logical volumes by combining logical units from different physical storage devices, establishing connections with hosts, and setting read/write permissions, enabling global read/write control without relying on an application layer like a file system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If LVM or CLVM is used for logical volume management, then logical volume construction capability is provided, but global read/write control across multiple hosts cannot be achieved
Solution Approach 1:
The patent introduces a storage management system as an intermediary component that sits between multiple hosts and the physical storage devices. This mediator establishes logical volumes and controls read/write permissions globally across all hosts, resolving the contradiction by providing centralized authority while maintaining multi-host accessibility. The storage management system acts as the intermediary that enables both global control and multi-host capability simultaneously.
2Adaptability or versatility
If CLVM is used to enable cluster version logical volume management, then multi-host access is enabled, but additional applications like file systems are required which increases system complexity
Solution Approach 1:
The patent merges the logical volume management functionality with the storage management system itself, eliminating the need for separate applications like file systems. By combining multi-host access capability and logical volume control into a single integrated system, the patent reduces overall system complexity while maintaining adaptability across multiple hosts.
Solution Approach 2:
The storage management system is designed to perform multiple functions universally: it provides logical volume construction, read/write permission control, and multi-host access management all within a single system. This multi-functionality eliminates the need for additional specialized applications, thereby reducing system complexity while maintaining versatility.
3Reliability
If SAN storage or distributed storage is used, then write once read many capability is provided, but capacity and read/write switch flexibility are limited
Solution Approach 1:
The patent implements dynamic read/write permission switching capability where the storage management system can flexibly change which hosts have read or write permissions on logical volumes in real-time. This dynamic control mechanism provides both write-once-read-many reliability and flexible adaptability for capacity management and permission switching, overcoming the limitations of static SAN or distributed storage systems.
Data Source
AI summary
Embodiments of the present disclosure relate to a logical volume construction method and apparatus, and a device, a readable storage medium and a program product. The method comprises: acquiring logical volume construction demand information; constructing a logical volume based on the logical volume construction demand information, and obtaining logical volume information, wherein the logical volume comprises one or more logical units from different physical storage devices; and establishing, based on the logical volume information, a connection between one or more hosts and the logical volume, wherein the hosts have a mapping relationship with the logical volume, and differ in read/write permission for the logical volume.