In the digital transformation journey of a large international bank, a pivotal step involved migrating their application from an IBM mainframe to Oracle infrastructure. This migration necessitated the seamless transfer of millions of customer records from the legacy mainframe system to the new Oracle system. Ensuring the accuracy and completeness of this data migration process was paramount to maintaining operational integrity and customer satisfaction.

Problem Statement

The bank faced the significant challenge of transferring vast amounts of customer data from the IBM mainframe to the Oracle system without compromising data integrity or risking the loss of critical information. With millions of customer records stored in the legacy system, any discrepancies or errors in the migration process could have severe consequences, including financial loss, regulatory compliance issues, and damage to the bank’s reputation. The bank needed a robust solution to validate, reconcile, and correct any inconsistencies in the migrated data to ensure a smooth transition to the new system.


  • Data Migration Complexity: Moving millions of customer records from one system to another while ensuring data accuracy and completeness posed a significant technical challenge.
  • Risk of Data Loss or Corruption: The migration process carried the inherent risk of data loss, corruption, or discrepancies, which could have severe implications for the bank’s operations and reputation.
  • Reconciliation of Discrepancies: Identifying and reconciling any discrepancies between the source data on the mainframe and the target data on the Oracle system required meticulous attention to detail and comprehensive data validation processes.


To address the challenges associated with the data migration process, the bank implemented a solution leveraging Pirl’s capabilities:

  • Data Pipeline Development: A robust data pipeline was built using Pirl to facilitate the transfer of customer data from the IBM mainframe to the Oracle system.
  • Data Comparison and Validation: Pirl’s tools were utilized to compare the source data from the mainframe with the target data in Oracle, identifying any discrepancies or inconsistencies.
  • Discrepancy Highlighting and Correction: Discrepancies detected during the data comparison process were highlighted to the bank’s team for review, recovery, and correction.
  • Custom Reconciliation: In addition to identifying migration discrepancies, Pirl was configured to identify and address other data inconsistencies based on specific customer requirements, ensuring data integrity and completeness.


The implementation of the Pirl solution yielded significant results and outcomes:

  • Data Accuracy Assurance: By comparing and validating source and target data, the bank ensured the accuracy and completeness of customer records migrated to the Oracle system.
  • Timely Discrepancy Resolution: Discrepancies identified during the migration process were promptly addressed, minimizing the risk of operational disruptions or customer impact.
  • Comprehensive Data Reconciliation: Pirl’s tools facilitated comprehensive reconciliation of data inconsistencies, enabling the bank to maintain data integrity and regulatory compliance.


  • Smooth System Migration: The robust data validation and reconciliation process facilitated a smooth transition from the IBM mainframe to the Oracle system, minimizing disruption to business operations.
  • Enhanced Data Integrity: By identifying and correcting data discrepancies, the bank improved the integrity and reliability of customer data in the new system.
  • Risk Mitigation: Proactively identifying and addressing data inconsistencies reduced the risk of financial loss, regulatory penalties, and reputational damage associated with inaccurate or incomplete customer records.
  • Operational Efficiency: Streamlining the data reconciliation process with Pirl’s tools saved time and resources, allowing the bank to focus on core business activities and strategic initiatives.

Through strategic implementation of Pirl’s capabilities, the international bank successfully migrated its application from an IBM mainframe to Oracle infrastructure while ensuring the accuracy, completeness, and integrity of millions of customer records, thereby safeguarding its operations and reputation in the process.


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