Home > Storage > ObjectScale and ECS > Product Documentation > Dell ECS: GeoDrive Best Practices > Data restore
When a stubbed file is opened for read, it is restored from ECS storage as pictured in Figure 4. To reduce space on local disk cache, files are stubbed when a file is not accessed for a certain user-defined period, or when a certain space threshold on local disk cache has been reached. For large files, restores are done in parts and in parallel and then restored for performance.