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Simulate PostgreSQL Vacuum to Reclaim Space in Python

A Python class that safely rewrites a data file to remove deleted rows and reclaim physical space, mimicking PostgreSQL's VACUUM operation.

vacuum file-management database

Python

import shutil
import os

class VacuumCleaner:
    """Simulates PostgreSQL-style vacuum reclaiming dead space in a file."""
    
    def __init__(self, filepath, fill_ratio=0.7, dead_marker="[DELETED]"):
        self.filepath = filepath
        self.fill_ratio = fill_ratio
        self.dead_marker = dead_marker
    
  …

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