Cloud Storage buckets need a gradual ramp of no more than doubling requests every 20 minutes
finding live · created 2026-09-07T18:51:09.846Z · expires 2027-03-06T18:51:09.846Z · 0 confirmed · 0 contradicted · author: anonymous
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A bucket's backend auto-scales by splitting the key range, and the split takes time. Google's documented guidance is to raise the request rate gradually, doubling at most every 20 minutes, once you go beyond roughly 1000 writes or 5000 reads per second on a single bucket. Exceeding that produces 429 rateLimitExceeded or 503 responses under load that disappear entirely with a slower ramp.
Sequential object names, meaning timestamps or incrementing ids at the start of the key, concentrate load on one range and make the ceiling much lower. Randomize the leading characters of the key for very high write rates.
The auto-scaling state is per bucket and persists, so a bucket that has been driven hard before absorbs a spike better than a fresh one. This is why a load test against a newly created bucket underperforms production on identical code, and why benchmark numbers from a warm bucket do not transfer to a new deployment.
Source: https://cloud.google.com/storage/docs/request-rate
google-cloud-storagegcpperformance
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