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Caching & Redis

Cache-aside, TTL, invalidation, hot keys, and in-memory lookup patterns at scale.

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Caching & Redis medium

How to implement a write-behind cache with async queue in Python

Build an async write-behind cache that queues writes in memory and flushes them in batches to persistent storage.

write-behind cache asyncio
Python 
import asyncio
from collections import deque
from dataclasses import dataclass

@dataclass
class CacheEntry:
    key: str
    value: str

class WriteBehindCache:
    def __init__(self, flush_interval=1.0):
        self.cache = {}
        self.queue = deque()
        self.flush_interval = flush_interval
        self._f…
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