System and method for managing storage space usage on a storage system

Patent metadata

Field	Value
Publication number	US-11487470-B2
Application number	US-202016884363-A
Country	US
Kind code	B2
Filing date	May 27, 2020
Priority date	May 27, 2020
Publication date	Nov 1, 2022
Grant date	Nov 1, 2022

Abstract

A method, computer program product, and computing system for determining whether storage space usage on a storage system has reached a predefined threshold of a total storage capacity of the storage system. An out-of-space mode may be initiated on the storage system in response to determining that the storage space usage has reached the predefined threshold of the total storage capacity of the storage system. An amount of free storage capacity for exiting the out-of-space mode may be determined based upon, at least in part, a predefined minimum free storage capacity, a predefined maximum free storage capacity, and the total storage capacity of the storage system.

First claim

What is claimed is:

1. A computer-implemented method, executed on a computing device, comprising:
receiving, via the computing device, a predefined minimum free storage capacity, a predefined maximum free storage capacity, a predefined minimum total storage capacity, and a predefined maximum total storage capacity associated with a storage system;
determining, via the computing device, whether storage space usage on the storage system has reached a predefined threshold of a total storage capacity of the storage system;
initiating, via the computing device, an out-of-space mode on the storage system in response to determining that the storage space usage has reached the predefined threshold of the total storage capacity of the storage system;
determining, via the computing device, an amount of free storage capacity for exiting the out-of-space mode based upon, at least in part, the predefined minimum free storage capacity, the predefined maximum free storage capacity, and the total storage capacity of the storage system, wherein determining the amount of free storage capacity for exiting the out-of-space mode includes determining, via the computing device, the amount of free storage capacity for exiting the out-of-space mode based upon a ratio of the difference between the predefined minimum free storage capacity and the predefined maximum free storage capacity and the difference between the predefined minimum total storage capacity and the predefined maximum total storage capacity, wherein the amount of free storage capacity for exiting the out-of-space mode is the predefined minimum free storage capacity when the total storage capacity of the storage system is less than or equal to the predefined minimum total storage capacity and is configured to prevent the storage system from cycling in and out of the out-of-space mode, wherein the amount of free storage capacity for exiting the out-of-space mode is the predefined maximum free storage capacity when the total storage capacity of the storage system is greater than or equal to the predefined maximum total storage capacity and is configured to reduce an amount of time the storage system is in the out-of-space mode;
determining, via the computing device, that the storage system usage is below the predefined threshold of the total capacity;
determining, via the computing device, whether the storage system has at least the amount of free storage capacity for exiting the out-of-space mode;
in response to determining that the storage system has at least the amount of free storage capacity for exiting the out-of-space mode and that the storage system usage is below the predefined threshold of the total capacity, exiting, via the computing device, the out-of-space mode; and
in response to determining that the storage system does not have at least the amount of free storage capacity for exiting the out-of-space mode, rejecting, via the computing device, one or more write requests received for the storage system.

2. The computer-implemented method of claim 1 , wherein determining whether the storage space usage on the storage system has reached the predefined threshold of the total capacity of the storage system includes determining, via the computing device, the storage space usage at one or more time intervals based upon, at least in part, a previously determined storage space usage.

3. The computer-implemented method of claim 1 , wherein initiating the out-of-space mode on the storage system includes processing, via the computing device, one or more read requests on the storage system.

4. The computer-implemented method of claim 1 , wherein determining the amount of free storage capacity for exiting the out-of-space mode includes determining, via the computing device, the amount of free storage capacity for exiting the out-of-space mode as a logarithmic function of the total storage capacity of the storage system based upon, at least in part, the predefined minimum free storage capacity, the predefined maximum free storage capacity, the predefined minimum total storage capacity, and the predefined maximum total storage capacity.

5. A computer program product residing on a non-transitory computer readable medium having a plurality of instructions stored thereon which, when executed by a processor, cause the processor to perform operations comprising:
receiving, via the processor, a predefined minimum free storage capacity, a predefined maximum free storage capacity, a predefined minimum total storage capacity, and a predefined maximum total storage capacity associated with a storage system;
determining, via the processor, whether storage space usage on a storage system has reached a predefined threshold of a total storage capacity of the storage system;
initiating, via the processor, an out-of-space mode on the storage system in response to determining that the storage space usage has reached the predefined threshold of the total storage capacity of the storage system; and
determining, via the processor, an amount of free storage capacity for exiting the out-of-space mode based upon, at least in part, a predefined minimum free storage capacity, a predefined maximum free storage capacity, and the total storage capacity of the storage system, wherein determining the amount of free storage capacity for exiting the out-of-space mode includes determining, via the computing device, the amount of free storage capacity for exiting the out-of-space mode based upon a ratio of the difference between the predefined minimum free storage capacity and the predefined maximum free storage capacity and the difference between a predefined minimum total storage capacity and a predefined maximum total storage capacity, wherein the amount of free storage capacity for exiting the out-of-space mode is the predefined minimum free storage capacity when the total storage capacity of the storage system is less than or equal to the predefined minimum total storage capacity and is configured to prevent the storage system from cycling in and out of the out-of-space mode, wherein the amount of free storage capacity for exiting the out-of-space mode is the predefined maximum free storage capacity when the total storage capacity of the storage system is greater than or equal to the predefined maximum total storage capacity and is configured to reduce an amount of time the storage system is in the out-of-space mode;
determining, via the computing device, that the storage system usage is below the predefined threshold of the total capacity;
determining, via the computing device, whether the storage system has at least the amount of free storage capacity for exiting the out-of-space mode;
in response to determining that the storage system has at least the amount of free storage capacity for exiting the out-of-space mode and that the storage system usage is below the predefined threshold of the total capacity, exiting, via the computing device, the out-of-space mode; and
in response to determining that the storage system does not have at least the amount of free storage capacity for exiting the out-of-space mode, rejecting, via the computing device, one or more write requests received for the storage system.

6. The computer program product of claim 5 , wherein determining whether the storage space usage on the storage system has reached the predefined threshold of the total capacity of the storage system includes determining, via the processor, the storage space usage at one or more time intervals based upon, at least in part, a previously determined storage space usage.

7. The computer program product of claim 5 , wherein initiating the out-of-space mode on the storage system includes processing, via the processor, one or more read requests on the storage system.

Assignees

• Emc Ip Holding Co Llc

Inventors

• Vankamamidi Vamsi K
• Li Liam
• Liu Yousheng
• Xu Xinlei

Classifications

• G06Q10/0631

  Resource planning, allocation, distributing or scheduling for enterprises or organisations · CPC title

• G06F3/0604

  Improving or facilitating administration, e.g. storage management · CPC title

• G06F3/0634

  by changing the state or mode of one or more devices · CPC title

• G06F3/0689 Primary

  Disk arrays, e.g. RAID, JBOD · CPC title

• G06F3/0673

  Single storage device · CPC title