Function getRandomKey

fdbserver/workloads/ReadWrite.actor.cpp:548–554

	}

	int64_t getRandomKey(uint64_t nodeCount) {
		if (forceHotProbability && deterministicRandom()->random01() < forceHotProbability)
			return deterministicRandom()->randomInt64(0, nodeCount * hotKeyFraction) /
			       hotKeyFraction; // spread hot keys over keyspace
		else
			return deterministicRandom()->randomInt64(0, nodeCount);
	}

	double sweepAlpha(double startTime) {
		double sweepDuration = testDuration / rampSweepCount;