The importance of caches in IT
In the discussion the task was spontaneously born, it seemed interesting:
A huge service performs queries, the results of which are cached. Performing an unencrypted request is tens of thousands of times longer than a cached one. One day something went bad, and the percentage of hits in this cache fell from 99% to 98%.
Previously, the service worked on 100 absolutely identical servers. How many servers are needed now?
')
PS: the task is not quite strictly formulated, but this should not seriously interfere with its solving :)
A huge service performs queries, the results of which are cached. Performing an unencrypted request is tens of thousands of times longer than a cached one. One day something went bad, and the percentage of hits in this cache fell from 99% to 98%.
Previously, the service worked on 100 absolutely identical servers. How many servers are needed now?
')
PS: the task is not quite strictly formulated, but this should not seriously interfere with its solving :)
Source: https://habr.com/ru/post/53780/
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