A store with N = 3 sends each write to all 3 replicas and each read to 2 replicas (R = 2). Clients make 10,000 writes/s and 30,000 reads/s. How many operations per second do the replicas handle in total?

Answer

About 90,000 replica operations/s. In review, anything from 60,000 to 135,000 counts as right.

The worked estimate

Writes: 10,000 × 3 = 30,000. Reads: 30,000 × 2 = 60,000. Total = 90,000 operations/s, more than twice the 40,000 the clients send. Size the replicas for that multiplied load.

Numbers: Numbers to know.

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