TOTAL QUOTAS FOR DATA STORAGE SYSTEM

• US 20140281214A1
• Filed: 05/17/2013
• Published: 09/18/2014
• Est. Priority Date: 03/15/2013
• Status: Active Grant

• Current Assignee: Hewlett Packard Enterprise Development LP (Hewlett-Packard Enterprise Company)
• Original Assignee: Silicon Graphics International Corporation (Hewlett-Packard Enterprise Company)
• Inventors: Myers, Benjamin Paul, Rehm, Kevan Flint
• Granted Patent: US 9,229,661 B2
• Time in Patent Office: Days
• US Class Current: 711/112
• CPC Class Codes: G06F 11/1448 Management of the data involved in backup or backup restore
• CPC Class Codes: G06F 3/0617 in relation to availability
• CPC Class Codes: G06F 3/0653 Monitoring storage devices or systems
• CPC Class Codes: G06F 3/0689 Disk arrays, e.g. RAID, JBOD

Abstract

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.

Claims

1. A method for managing data storage, comprising:

receiving a request to store data for a user;

determining total storage space usage from hard disk storage space usage and back-up storage space usage associated with user;

comparing total storage space usage to allowed storage; and

providing response to user request based on results of the comparison.

2. The method of claim 1, wherein the total storage space usage is determined from metadata retrieved from the hard disk storage space.

3. The method of claim 2, wherein the metadata includes extents associated with hard disk usage and metadata associated with back-up storage usage

4. The method of claim 1, further comprising:

determining that the total storage space usage is less than a hard quota; and

writing the data to hard disk storage.

5. The method of claim 1, further comprising:

determining that the total storage space usage is less than a hard quota but larger than a soft quota;

writing the data to hard disk storage; and

overwriting the data from hard disk storage after a period of time without permission from the user.

6. The method of claim 1, further comprising:

moving data from the hard disk space to back-up storage space; and

replacing data extents associated with the data and the hard disk space usage with offline extents.

7. A non-transitory computer readable storage medium having embodied thereon a program, the program being executable by a processor to perform a method for managing data storage, the method comprising:

receiving a request to store data for a user;

determining total storage space usage from hard disk storage space usage and back-up storage space usage associated with user;

comparing total storage space usage to allowed storage; and

providing response to user request based on results of the comparison.

8. The non-transitory computer readable storage medium of claim 7, wherein the total storage space usage is determined from metadata retrieved from the hard disk storage space

9. The non-transitory computer readable storage medium of claim 8, wherein the metadata includes extents associated with hard disk usage and metadata associated with back-up storage usage

10. The non-transitory computer readable storage medium of claim 7, the method further comprising:

determining that the total storage space usage is less than a hard quota; and

writing the data to hard disk storage.

11. The non-transitory computer readable storage medium of claim 7, the method further comprising:

determining that the total storage space usage is less than a hard quota but larger than a soft quota;

writing the data to hard disk storage; and

overwriting the data from hard disk storage after a period of time without permission from the user.

12. The non-transitory computer readable storage medium of claim 7, the method further comprising:

moving data from the hard disk space to back-up storage space; and

replacing data extents associated with the data and the hard disk space usage with offline extents.

13. A system for managing data storage, comprising:

a processor;

a memory;

one or more modules stored in memory and executable by the processor to;

receive a request to store data for a user,

determine total storage space usage from hard disk storage space usage and back-up storage space usage associated with user,

compare total storage space usage to allowed storage, and

provide response to user request based on results of the comparison.

14. The system of claim 13, wherein the total storage space usage is determined from metadata retrieved from the hard disk storage space

15. The system of claim 14, wherein the metadata includes extents associated with hard disk usage and metadata associated with back-up storage usage

16. The system of claim 13, the one or more modules further executable to:

determine that the total storage space usage is less than a hard quota; and

write the data to hard disk storage.

17. The system of claim 13, the one or more modules further executable to:

determine that the total storage space usage is less than a hard quota but larger than a soft quota;

write the data to hard disk storage; and

overwrite the data from hard disk storage after a period of time without permission from the user.

18. The system of claim 13, the one or more modules further executable to:

move data from the hard disk space to back-up storage space; and

replace data extents associated with the data and the hard disk space usage with offline extents.