Storing user data in a datacenter on the Internet that is physically situated in the same country where the data originated. People who fear losing private data to hackers favor data localization. However, opponents claim it destroys the flexibility of the Internet, where data can be duplicated around the world for backup and efficient access. See localization.
This is partly because the IOAware scheduling algorithm for the data localization ratio is higher than the other two, which reduces the time slices for downloading data, and reduces disk IO operations.