Alias Database for Fibre Channel Fabric Device Management
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Solution Overview
Problem
In storage area networks, managing port world wide names (WWNs) and zoning mechanisms is challenging due to their complexity and lack of globally unique, human-readable names, making device management difficult, especially when devices are moved across fibre channel switches.
Innovation Solution
A system that maintains a one-to-one correspondence between WWNs and aliases in an alias database synchronized across fibre channel switches, allowing devices to be uniquely identified using either WWNs or aliases, and automatically propagating these associations to ensure seamless management across the fabric without manual updates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If port world wide names (WWNs) are used to identify devices in storage area networks, then device identification is achieved, but the names are not easily interpreted by system administrators and management becomes difficult
Solution Approach 1:
The patent introduces an alias database that acts as an intermediary layer between human administrators and device WWNs. The database stores mappings between human-readable aliases and machine-readable WWNs, allowing administrators to manage devices using simple aliases while the system internally resolves these to the actual WWNs for communication.
Solution Approach 2:
The patent creates a virtual copy of the device identification system by maintaining alias entries that replicate the functionality of WWNs but with human-readable names. Each device gets an alias copy that can be used for management purposes, while the original WWN remains unchanged for technical operations.
2Reliability
If zoning mechanisms are implemented to partition fibre channel fabric, then security and restrictions are improved, but the existing naming mechanisms are very limited and restricted to zoning process only
Solution Approach 1:
The alias database mechanism is designed to be universal and applicable beyond just zoning operations. The same alias database can support device identification, migration tracking, and management across the entire fibre channel fabric, not limited to zone-based partitioning. This multi-functional approach enhances versatility while maintaining security benefits.
3Adaptability or versatility
If devices are moved from one switch to another in fibre channel fabric, then device flexibility is improved, but manual database updates are required which increases administrative burden
Solution Approach 1:
The system implements automatic feedback mechanisms where fibre channel switches monitor device locations and communicate this information to the alias database. When a device moves between switches, the switch detects the movement and automatically updates the alias database with the new location information, eliminating the need for manual administrative updates.
Solution Approach 2:
The alias database system performs self-updates through automatic synchronization with fibre channel switches. The database autonomously tracks device movements and maintains accurate mappings without requiring external administrative intervention, making the system self-maintaining and reducing operational overhead.
Data Source
AI summary
Methods and apparatus are provided for improving name services in a fiber channel fabric. Either a world wide name or an alias can be used to uniquely identify a device such as a storage device on a fiber channel fabric. World wide name and alias associations are maintained in an alias database that is synchronized on connected fiber channel switches in a physical fiber channel fabric. Devices can be moved from one switch to another while maintaining alias and world wide name associations.