What happens if there are too many writes? Do the readers starve? Building a data store on top of a single global lock with read/write semantics is a valid technical choice. Perhaps it is a bit questionable to market that as “a database”. But it seems to me that if you’re going all in with that approach, if that lock will provide the concurrency control for your whole database, you need to have very explicit, customizable semantics for prioritizing readers and writers, to ensure the server remains responsive regardless of the workload.
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Дачников призвали заняться огородом14:58
Equal (5): Everything in this space must be equal to 5. The answer is 6-5, placed horizontally; 5-1, placed vertically.，这一点在新闻中也有详细论述