1. A non-transitory computer readable medium storing computer executable instructions, which, when executed by a processor, causes the processor to carry out a method for generating content of a file in an in-memory file system, comprising: receiving a filename comprising at least one file metadata, wherein the file metadata comprises a file size of the file, a random seed for generating content of the file, and modification information of the file; generating file content for a file based on the filename; and providing the file content.