File storage system based on coordinated exhaustible and non-exhaustible storage

摘要

A file storage system may be implemented by coordinating non-exhaustible and exhaustible storage devices. The exhaustible storage devices may be lower grade flash based storage devices. The non-exhaustible storage devices may be storage devices based on magnetic recording mechanisms or higher grade flash storage. The file storage system may store received content items on the exhaustible storage devices. The file storage system may additionally store metadata for the content items and/or the file storage system on the non-exhaustible storage devices. During operation, the file storage system may globally optimize the content items on the exhaustible storage devices such that more heavily accessed items are moved to exhaustible storage devices that have experienced relatively few data operations. The file storage system can move less frequently accessed content items to exhaustible storage devices that have experienced a relatively large number of data operations. As such, the operation lifetime of the exhaustible storage devices as a whole can be prolonged.

主权项

1. A method comprising:
receiving one or more requests from one or more online system users of an online system to access a content item stored in a first exhaustible storage of an the online system; determining one or more users of the online system associated with the content item; determining an estimated number of times the content item will be accessed based on one or more selected of a group consisting of: frequencies with which users associated with the content item log into the online system, frequencies with which the users upload content items to the online system, and frequencies with which users interact with other users through the online system, and any combination thereof; and responsive to the estimated number exceeding a threshold number, moving the content item from the first exhaustible storage to a second exhaustible storage, wherein the second exhaustible storage has been accessed a fewer number of times than the first exhaustible storage.