Round-robin (RR) is one of the algorithms employed by schedulers in computing. Jobs are assigned to each worker in circular order, It’s simple but useful.

I have a web server writing by node just for front-end display, APIs are most holding by back-end servers. So I have 2 functions supporting my structure. The first is health check helping me check whether the back-end server is ready; and the other one is round robin scheduling, to ensure an even distribution.
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