Zero Downtime Data Transfer via Staging Table Switch
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Solution Overview
Problem
Conventional data transfer techniques are slow and often result in data loss or corruption, affecting system performance and requiring downtime and maintenance.
Innovation Solution
A method and system that involves obtaining source data, populating it into a staging table, locking the target table, and initiating a data source switch to treat the staging table as the target table, ensuring instantaneous data transfer with minimal maintenance by ensuring data availability throughout the process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional data transfer techniques are used, then data is transferred from source to target, but the process is slow and results in data loss or corruption requiring downtime and maintenance
Solution Approach 1:
The patent applies preliminary action by creating a staging table and copying data in advance before the actual data transfer is needed. The staging table is populated with source data beforehand, and a lock is obtained on the target table prior to switching data sources. This preparation work is done while the system is still operational, eliminating the need for downtime during the critical data switch operation.
Solution Approach 2:
The staging table serves as an intermediary between the source and target tables. Instead of directly transferring data from source to target (which causes downtime and data loss), the patent introduces the staging table as a buffer. Data is first copied to the staging table, then the application's data source is switched to the staging table, and finally the target table is truncated. This intermediary structure enables seamless data transition without system interruption.
2Productivity
If conventional data transfer techniques are used, then data is transferred, but system performance is affected and maintenance is required
Solution Approach 1:
The patent performs data copying and table preparation in advance while the system is running normally. The staging table is created and populated with source data before any data switch occurs, and the target table lock is obtained beforehand. This preliminary preparation eliminates performance degradation and maintenance requirements during the actual data transfer operation, as the switch itself becomes a simple pointer redirection rather than a lengthy data migration process.
3Speed
If data source switching is performed, then instantaneous data transfer is achieved, but data availability must be maintained throughout the process
Solution Approach 1:
The staging table acts as a reliable intermediary that guarantees data availability during the switch. The application's data source is switched from the target table to the staging table, which already contains the required source data. This intermediary structure ensures that data is always accessible - either from the target table before the switch or from the staging table after the switch - eliminating any window of unavailability that might occur during a direct transfer operation.
Solution Approach 2:
The staging table is populated with source data in advance, before the data source switch is initiated. This preliminary population ensures that when the application switches its data source to the staging table, the data is already there and immediately available, achieving instantaneous access without compromising reliability. The lock on the target table obtained beforehand also ensures data consistency throughout the transition.
Data Source
AI summary
A method for performing data transfer includes: obtaining source data; populating a staging table with the source data; making a first determination that the source data was successfully populated to the staging table; making a second determination that a target table is available, in which an application is directed to use data in the target table; and initiating, based on the first determination and the second determination, a data source switch of the application, in which the data source switch directs the application to use the source data in the staging table and not use the data in the target table, in which the application uses the source data in the staging table when the data source switch is successful.