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Database scaling & optimization

Indexing, connection pooling, read replicas, query tuning, and throughput-aware SQL.

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Database scaling & optimization medium

How to Simulate a Stable Sort Cursor in Python

Build a MongoDB-style cursor mock that stably sorts records by a key while preserving original order for ties, with next() and rewind() methods.

sorting cursors database
Python 
```python
import random

class CursorStableSortMock:
    """Simulates stable sorting with a cursor-like pointer for MongoDB-style queries."""
    
    def __init__(self, data, sort_key, reverse=False):
        self.data = list(data)
        self.sort_key = sort_key
        self.reverse = reverse
        self._index = …
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