Nested Queued Transaction Manager for Database Migration
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Solution Overview
Problem
The existing methods for data migration between databases are time-intensive and labor-intensive, causing databases to be inaccessible during transactions, and do not allow for easy interruption or rollback, which can disrupt the transfer process and lead to corruption.
Innovation Solution
A method and apparatus that structure data transfer as a set of small, nested transactions, managed by a migration manager using queues to enable granular transaction processing and rollback of individual or related transactions, allowing for continuous database accessibility and error handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data transfer is performed as a single large transaction, then data integrity is maintained, but database accessibility is lost and rollback becomes difficult
Solution Approach 1:
The patent divides a large data migration transaction into multiple smaller nested transactions organized in a hierarchical structure. Each transaction processes a subset of records (e.g., 1000 records per transaction) rather than processing all records in one monolithic transaction. This segmentation allows the database to remain accessible for other operations between transactions while maintaining data integrity through proper nesting and rollback mechanisms.
Solution Approach 2:
The patent implements nested transactions where outer transactions contain inner transactions in a hierarchical structure. When a transaction fails, the rollback mechanism can selectively rollback only the failed transaction and its dependent nested transactions, while leaving other independent transactions intact. This nesting structure enables partial rollbacks and maintains database accessibility throughout the migration process.
2Productivity
If data transfer is performed as a single large transaction, then complete data migration is achieved, but transaction interruption becomes difficult and system disruption increases
Solution Approach 1:
By segmenting the data migration into smaller nested transactions, the system can interrupt and rollback individual transactions without affecting the entire migration process. Each transaction processes a manageable subset of records, allowing for efficient interruption and resumption without the time loss associated with rolling back a single large transaction.
Solution Approach 2:
The patent introduces dynamic transaction management where the migration process can adaptively adjust transaction boundaries, nesting levels, and rollback scope based on system conditions and error states. This dynamic approach enables flexible interruption and resumption of migrations, optimizing the balance between completion productivity and interruption time loss.
3Reliability
If databases are made inaccessible during transaction, then data consistency is ensured, but system productivity decreases
Solution Approach 1:
The patent segments the data migration process into multiple small nested transactions that briefly lock the database only for the duration of each individual transaction rather than for the entire migration. This allows other system operations to proceed in between transactions, maintaining data consistency during each transaction while preserving overall system productivity.
Solution Approach 2:
The nested transaction structure enables continuous useful action by allowing non-migration database operations to proceed between migration transactions. The database remains partially accessible throughout the migration process, ensuring data consistency for migrated records while maintaining productivity for other system functions.
Data Source
AI summary
A method and apparatus that manages transactions during a data migration. The transfer of data from an old database to a new database is structured as a set of small transactions. The transactions can be structured in a hierarchy of dependent transactions such that the transactions are nested or similarly hierarchical. A migration manager includes a set of transaction management methods or processes that enable the processing of the nested transactions thereby providing a higher level of granularity in transaction size and providing the ability to rollback small individual transactions as well as affected related transactions. The transaction management methods and processes manage a set of queues that are utilized by the migration manager to generate and execute the nested transactions.