Zero-Byte Ingestion Pending Indicator File for Data Deduplication
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Solution Overview
Problem
Current data ingestion systems face challenges in preventing data duplication during incremental ingestion operations, particularly due to synchronization issues between watermark data and ingested data, which can lead to performance inefficiencies and data integrity problems.
Innovation Solution
The system employs an ingestion pending indicator file, initially a zero-byte file, to track data ingestion status, creating it if not present and deleting it upon completion. If the file is present, it scans the ingested data to generate corrected watermark data, ensuring only new data is copied, thus preventing duplication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the system scans the ingested data to generate corrected watermark data when the indicator file is present, then data duplication is prevented, but the ingestion process time increases
Solution Approach 1:
The system performs the watermark correction scan only when necessary (when the indicator file is present), preparing corrected watermark data in advance for the subsequent ingestion operation. This preliminary action prevents duplication only when needed, avoiding unnecessary scanning time during normal operations.
Solution Approach 2:
The system dynamically adjusts its behavior based on the presence of the ingestion pending indicator file. When the file is absent, it performs standard ingestion without scanning. When the file is present, it switches to correction mode with scanning. This dynamic adaptation resolves the contradiction by applying the time-consuming scanning operation only in the specific condition where data integrity is at risk.
2Reliability
If the system checks for the ingestion pending indicator file at initialization, then data duplication is prevented, but the operation complexity increases
Solution Approach 1:
The ingestion pending indicator file serves as an intermediary mechanism that simplifies the overall system logic. Instead of implementing complex real-time synchronization checks during ingestion, the system uses this simple file presence check to determine whether watermark correction is needed. The intermediary file encapsulates the complexity of coordination between parallel ingestion operations.
3Measurement precision
If the system creates a new indicator file when none exists, then ingestion status is tracked accurately, but additional file operations increase processing overhead
Solution Approach 1:
The ingestion pending indicator file is a temporary, lightweight file that exists only for the duration of the ingestion operation. It is created at initialization, used to coordinate the ingestion process, and deleted upon completion. This disposable file provides accurate status tracking without requiring persistent storage or complex file management, minimizing the productivity impact.
Data Source
AI summary
A data ingestion system prevents data duplication during a data ingestion operation by determining whether a current instance of an ingestion pending indicator file associated with a data set is present at initialization of the data ingestion operation. Upon determining that no current instance of the ingestion pending indicator file is present, the system generates and stores a new ingestion pending indicator file and performs the data ingestion operation using current watermark data. Upon determining that the current instance of the ingestion pending indicator file is not present, the system generates corrected watermark data and performs the data ingestion operation with respect to the corrected watermark data. Upon completion of the data ingestion operation, the system deletes the current instance of the ingestion pending indicator file.