Obviously, production may have many more than two so it can handle the intended load, but this staging environment need only have enough servers to adequately test the failure and recovery scenarios.

很明显，产品环境拥有的服务器可以远远多于两个，这样它可以处理预定的负载，而该临时环境只需要拥有足够的服务器来充分测试故障和恢复场景即可。

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In the event of a failure, you simply quiesce the test workload and let the DB2 standby assume the load of the failed server without consideration for throughput reduction.

当有故障发生时，只需暂停测试工作负载，让DB 2承担出故障的服务器的负载，这样就不必担心吞吐量降低。

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DPF failure diagnosis is carried out by on-board smoke hanging test, to verify the feasibility of this diagnosis strategy, no-load, medium load and full-load test are respectively carried out.

DPF失效诊断是通过车载挂烟试验进行的，为了验证本诊断策略的可行性，试验分别进行了空载、中等载荷和满载试验。

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