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2GIS had only its own hardware and rented racks in data center. Last year they increased their hardware to withstand the workload. But to double increase the hardware costs much, so instead of x2 2GIS keeps hot reserve in cloud and plans to scale there, if traffic increases dramatically or there is some issue with data center.
This is the talk about difficulties (millions of kludges) of unifying deployment for our own hardware + our own cloud + the cloud of one of the providers.