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Big data & Spark

PySpark jobs, partitioning, batch processing, and large-dataset transform patterns.

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Big data & Spark medium

Delta Lake ACID Transaction Log Mock in Python

Simulates Delta Lake's transactional log with JSON files for atomic commits, versioned operations, and crash recovery

delta-lake transaction-log acid
Python 
import json
import time
from pathlib import Path

class DeltaLog:
    def __init__(self, path):
        self.log_dir = Path(path)
        self.log_dir.mkdir(parents=True, exist_ok=True)
        self.version = 0

    def _write_txn(self, action, payload):
        txn = {
            "version": self.version,
           …
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