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I am implementing a website which allows users to upload their files. I wonder how the upload folder should be structured so that I can manage the uploaded files easily in the future. Should I provide different users with different sub-folders (for example, upload/user1 for user1, upload/user2 for user2, etc.) or should I just put them all in the same folder? And should I rename the uploaded files? (I know that a lot of websites do this!)
If you won’t be using BLOB, and the users may have an arbitrary number of images, then I think you should be using the subfolders. For instance, you could create a subfolder named after the user’s id. One of the reasons for this is that when the folder contains A LOT of files, the access times increase as it takes more time to find the file with specified name. You could also rename the files when they’re stored just so that there would be no chance of their names overlapping. Just don’t forget to store the newly-generated names in the DB.