From the perspective of the client, there is no down time, as the transition is automatic.

从用户角度，感觉不到停机，因为转换是自动完成的。

youdao

The president will waste no time in Japan, getting to work almost immediately after Air Force One touches down at a Tokyo airport.

VOA: standard.2009.11.12

So bogged down, no time for people?

FORBES: Fantasy Football: Time To Rank And Draft Employees?

The gold trade has been the longest hold of my career, and it shows no sign of slowing down any time soon.

FORBES: Gold Bound For New Highs

We glissade--make sleds of our backsides--and zip down the hill in no time.

FORBES: Go with the Floe