I was following the idea given here https://stackoverflow.com/a/65699375/4314952 to set up a shared cache that can be used by multiple workers (uvicorn).
However, I noticed that this does not work since a cache is created for each worker individually. How can I avoid this?
If I run the code below, I see multiple times init cache on the console and also if I (after once executed set_id) call many times /getid depending on which worker processes the request, I often get 0 as a result.
Please note that in my use case I must run uvicorn programatically (https://www.uvicorn.org/#running-programmatically).
# main.py
import os
from aiocache import Cache
from fastapi import FastAPI, status
import time
app = FastAPI()
cache = Cache(namespace="main")
class Meta:
def __init__(self):
print("init cache")
pass
async def get_id(self):
return await cache.get("id", default=0)
async def set_id(self):
value = time.time() * 1000
await cache.set("id", value)
meta = Meta()
@app.post("/setid")
async def set_id():
await meta.set_id()
return status.HTTP_200_OK
@app.get("/getid")
async def get_id():
return await meta.get_id()
if __name__ == "__main__":
num_workers = 8
uvicorn.run("main:app", host="0.0.0.0", port=8000, workers=num_workers)
