US 12,112,047 B2Granted

Method, device and computer program product for locking a storage area in a storage system

AssigneeDell Products L.P.

InventorsHaiyun Bao, Jianbin Kang, Jibing Dong, Geng Han

Life of this patent

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Abstract

Techniques lock a storage area in a storage system including a first storage node and a second storage node. Such techniques involve adjusting a value of at least one of a first counter at the first node and a second counter at the second node in response to receiving a data access request for the storage area at at least one of the first node and the second node. Such techniques further involve allocating a lock flag to the first node in response to a ratio of the value of the first counter to the value of the second counter being greater than a first threshold, the lock flag indicating that the storage area is locked by the first node. Accordingly, storage resources required by nodes that are accessed more frequently in statistics are effectively reduced, and the efficiency of applying stripe lock reduction are improved.

Claims20

Dependent claims

A method of locking a storage area in a storage system, the storage system comprising a first storage node and a second storage node, and the method comprising:

adjusting a value of at least one of a first counter at the first storage node and a second counter at the second storage node in response to receiving a data access request for the storage area at one of the first storage node and the second storage node;
and
allocating a lock flag to the first storage node in response to a ratio of the value of the first counter to the value of the second counter being greater than a first threshold, wherein the lock flag imposes a lock on the storage area by the first storage node;
wherein adjusting the value of at least one of the first counter and the second counter comprises:
decrementing the value of one of the first counter and the second counter based on the value of the first counter and the value of the second counter in response to receiving the data access request for the storage area at the first storage node and at least one of the value of the first counter and the value of the second counter being equal to a second threshold;
and
wherein decrementing the value of one of the first counter and the second counter comprises:
determining a first probability, the first probability being a ratio of the value of the first counter to a sum of the value of the first counter and the value of the second counter;
and
decrementing the value of the first counter with the first probability.

7 more elements

A device for locking a storage area in a storage system, the storage system comprising a first storage node and a second storage node, and the device comprising:

one or more processors;
a memory coupled to at least one processor of the one or more processors;
and
computer program instructions stored in the memory, wherein the computer program instructions, when executed by the at least one processor, cause the device to perform actions comprising:
adjusting a value of at least one of a first counter at the first storage node and a second counter at the second storage node in response to receiving a data access request for the storage area at one of the first storage node and the second storage node;
and
allocating a lock flag to the first storage node in response to a ratio of the value of the first counter to the value of the second counter being greater than a first threshold, wherein the lock flag imposes a lock on the storage area by the first storage node;
wherein adjusting the value of at least one of the first counter and the second counter comprises:
decrementing the value of one of the first counter and the second counter based on the value of the first counter and the value of the second counter in response to receiving the data access request for the storage area at the first storage node and at least one of the value of the first counter and the value of the second counter being equal to a second threshold;
and
wherein decrementing the value of one of the first counter and the second counter comprises:
determining a first probability, the first probability being a ratio of the value of the first counter to a sum of the value of the first counter and the value of the second counter;
and
decrementing the value of the first counter with the first probability.

11 more elements

A computer program product having a non-transitory computer readable medium which stores a set of instructions to lock a storage area in a storage system, the storage system comprising a first storage node and a second storage node;

the set of instructions, when carried out by computerized circuitry, causing the computerized circuitry to perform a method of:
adjusting a value of at least one of a first counter at the first storage node and a second counter at the second storage node in response to receiving a data access request for the storage area at one of the first storage node and the second storage node;
and
allocating a lock flag to the first storage node in response to a ratio of the value of the first counter to the value of the second counter being greater than a first threshold, wherein the lock flag imposes a lock on the storage area by the first storage node;
wherein adjusting the value of at least one of the first counter and the second counter comprises:
decrementing the value of one of the first counter and the second counter based on the value of the first counter and the value of the second counter in response to receiving the data access request for the storage area at the first storage node and at least one of the value of the first counter and the value of the second counter being equal to a second threshold;
and
wherein decrementing the value of one of the first counter and the second counter comprises:
determining a first probability, the first probability being a ratio of the value of the first counter to a sum of the value of the first counter and the value of the second counter;
and
decrementing the value of the first counter with the first probability.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/988,979Filed 17 Nov 2022
Priority: CN 202210424068.721 Apr 2022
Published: US 2023/0342043 A126 Oct 2023
Granted: 8 Oct 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

G06F 3/061
Specifically adapted to achieve a particular effect: improving I/O performance
G06F 3/0622
Securing storage systems: in relation to access
G06F 3/0619
Improving the reliability of storage systems: in relation to data integrity, e.g. data losses, bit errors
G06F 3/0653
Making use of a particular technique: monitoring storage devices or systems

Family

US 2023/0342043 A1Pre-grant publication · published 26 Oct 2023
US 12,112,047 B2This patent

From the US filing history. Foreign family members aren’t listed.

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