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Big data & Spark

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

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Big data & Spark easy

Cache persist MEMORY_ONLY mock in Python

Mock a MEMORY_ONLY persistence cache in Python with an LRU eviction policy and optional persistence flag.

cache lru mock
Python 
import time

class LRUCache:
    def __init__(self, capacity, persistence="MEMORY_ONLY"):
        self.capacity = capacity
        self.persistence = persistence
        self.cache = {}
        self.access_order = []
        self.hits = 0
        self.misses = 0

    def get(self, key):
        if key in self.cache:
 …
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