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The article says,

> At peak times, Cash App's database handles approximately 3–4 million queries per second (QPS) across 400 shards, totaling around 400TiB of data.

400TiB represents not a lot of this data. If each query stored only 1 byte, this would only be 4 years worth of this data.

If duplicated, or processed and the results stored, that would add up, too.




Why would a query store data? Are they logging individual queries?




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