Centralized Witness Node for ROBO Site Data Protection
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Solution Overview
Problem
Remote-office and Branch-office (ROBO) sites often lack local IT staff, making data protection and recovery challenging due to the need for multiple physical or virtual witness hosts, which increases costs and management complexity when the number of ROBO sites grows.
Innovation Solution
A central management computer system that monitors operation statuses of host computers across multiple ROBO sites and determines the cause of communication disruptions, eliminating the need for witness hosts by using a unified monitoring module to manage communication and data replication between sites.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a two-node virtual SAN cluster with one witness node is deployed at each ROBO site, then data protection and recovery capabilities are achieved, but the number of physical or virtual witness hosts increases significantly with the number of ROBO sites
Solution Approach 1:
The patent consolidates the witness node function from a distributed model (one per ROBO site) to a centralized model (single cloud-based witness node serving all sites). This merging approach maintains data protection capabilities while eliminating the need for multiple separate witness hosts, directly resolving the contradiction between reliability and device complexity
Solution Approach 2:
The cloud-based witness node is designed to serve multiple ROBO sites simultaneously, making it a universal component that performs the witness function across the entire distributed storage system. This multi-functional approach allows a single witness node to replace numerous site-specific witness nodes, reducing overall system complexity while maintaining data protection
2Reliability
If physical witness hosts are deployed at each ROBO site, then data protection is achieved, but hardware costs and infrastructure requirements increase
Solution Approach 1:
The patent uses virtualization to create virtual witness hosts in the cloud that replicate the witness functionality without requiring physical hardware at each ROBO site. This virtual copying approach maintains data protection capabilities while eliminating the need for additional physical hardware resources
Solution Approach 2:
The patent replaces the mechanical/physical witness host infrastructure with a cloud-based virtualized system. This substitution eliminates the need for physical hardware deployment, power, and cooling infrastructure at each ROBO site, directly addressing the contradiction between reliability and hardware resource consumption
3Reliability
If virtual witness hosts are deployed at each ROBO site, then data protection is achieved, but management complexity increases
Solution Approach 1:
The patent merges the management of multiple witness hosts into a single centralized cloud-based witness node. This consolidation simplifies management operations by providing a unified point of control, eliminating the need to manage and coordinate multiple distributed virtual witness hosts across different ROBO sites
Data Source
AI summary
System and method for managing multiple Remote-office and Branch-office (ROBO) sites use a central management computer to monitor operation statuses of host computers within the multiple ROBO sites and in response to a communication disruption in a particular ROBO site of the multiple ROBO sites, determining a cause of the communication disruption based on the operation statuses of the host computers within the particular ROBO site.