Data Replication for Seamless Job Resumption on Storage Failure
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Solution Overview
Problem
Existing information processing systems cannot seamlessly resume operations when a failure occurs in the computer storage device, as they lack the ability to store user data and configuration information in a way that allows job continuation upon storage medium failure.
Innovation Solution
The system employs a network-connected computer and server configuration where data from a primary storage device is replicated onto a secondary storage medium, allowing the server to determine a suitable replacement medium and maintain data integrity even if the primary fails, enabling job continuation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If user data and configuration information are stored only in the local storage device, then the computer can operate independently and quickly, but the system cannot resume operations when the storage device fails
Solution Approach 1:
The patent implements data replication by creating copies of user data and configuration information from the local storage device to a server storage device. This copying mechanism ensures that if the local storage fails, the system can recover by retrieving data from the server, thereby improving reliability without significantly increasing operational complexity
Solution Approach 2:
The patent introduces a server as an intermediary component between the local storage device and the user. The server acts as a mediator that stores backup copies of data and facilitates data recovery when local storage fails, resolving the contradiction by adding a intermediary element that enhances reliability while managing complexity
2Reliability
If data is replicated to a server, then data recovery is possible upon failure, but data transfer time and network dependency increase
Solution Approach 1:
The patent implements preliminary data replication where user data and configuration information are copied to the server in advance, before any failure occurs. This preliminary action ensures that when a failure happens, the data is already available at the server and can be quickly retrieved, reducing the actual recovery time despite the initial replication overhead
Solution Approach 2:
The patent applies partial replication by selectively copying only user data and configuration information to the server, rather than replicating all data. This partial action approach balances the need for recoverability with the cost of data transfer time and network usage, implementing just enough replication to solve the failure recovery problem
Data Source
AI summary
When data of HDD of computer is backed up to a a data center and a failure occurs in the HDD, the computer notifies failure information to the data center, and the data center stores the backed up data in a storage medium substituting HDD for subsequent delivery. Further, the computer executes processing, using a VNC server, from failure occurrence until recovery.