Distributed Systems Pattern: Singular Update Queue
fetched at August 20, 2020

When the state needs to be updated by multiple concurrent clients, we need it to be safely updated with one at a time changes. Generally locks are used to protect against concurrent modifications. But if the tasks being performed are time consuming, like writing to a file, blocking all the other calling threads until the task is completed can have severe impact on overall system throughput and latency. It is important to make effective use of compute resources, while still maintaining the guarantee of one at a time execution.

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