Abstract: Disclosed are various embodiments relating to virtual file systems for customers having network sites hosted by a hosting provider. A file system with multiple files of a customer is maintained for a hosting provider. Customer access to a virtualized version of the file system is facilitated. The virtualized version of the file system includes a virtual file that is dynamically generated based at least in part on one of the files in response to an access of the virtual file by the customer. The file system excludes the virtual file. A modification to the virtual file by the customer is obtained. The file in the file system is updated based at least in part on the modification to the virtual file.

Abstract: Disclosed are various embodiments for network site hosting in a managed environment. A request for a network page is obtained, where the network page is associated with a network site hosted by a hosting provider on behalf of a customer. Aggregated data is obtained from a data aggregation service. The aggregated data is aggregated by the data aggregation service from multiple data sources. Page generation code supplied by the customer is executed in one or more machine instances to generate the network page in response to the request. The page generation code has access to the aggregated data. A resource management application facilitates configuration of the machine instances by the customer.