Total quotas for data storage system

摘要

Quotas are tracked for user usage of hard disk drive space and offline backup storage space. The quota is enforced against the total space utilized by a user, not just high tier hard drive space usage. When data is migrated from hard disk drive space to backup storage space, data metadata is updated to reflect data kept offline for the user. As such, when users request to store new data, the data usage of hard disk space and backup storage space is determined from the metadata that reflects both data types, and the total storage spaced for the user is used to grant or reject the user's request to store more data in the system.

主权项

1. A method for managing data storage, comprising:
receiving a request to store data for a user; determining a total amount of storage space that is currently consumed by the user, wherein the total amount of storage space currently consumed by the user includes storage space at a hard disk system plus storage space at a back-up storage system, wherein the amount of storage space currently storing data from the user at the hard disk system and at the back-up storage system is stored as metadata at kernel layer at the hard disk system; comparing a total storage space usage of the user to a total amount of storage space allowed for the user, wherein the total storage space usage includes the total amount of storage currently consumed by the user plus an amount of storage space required to store the data from the user request; and determining that the total storage space usage is less than a hard quota; writing the data from the user request to the hard disk system; and updating the metadata at the kernel layer at the hard disk system to include information that identifies an amount of storage used to store the data from the user request.