Changing the service location for a domain name in the Dynamic Content Delivery Network (DCDN) console may have the following impacts:
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Increased origin traffic
If you change the service location from Chinese Mainland Only to Global, points of presence (POPs) outside the Chinese mainland are also used for content delivery. Because these POPs have no cached resources, they must retrieve content from your origin server, which temporarily increases origin traffic.
Monitor your origin server closely to ensure it can handle the increased traffic.
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Reduced cache hit ratio
The increase in origin traffic temporarily reduces the cache hit ratio.