CN109992220B - Lock release method, device, equipment and medium - Google Patents
Lock release method, device, equipment and medium Download PDFInfo
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- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
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Abstract
The invention discloses a lock release method, a device, equipment and a medium, wherein the method comprises the following steps: when a physical node in an abnormal working state exists in the distributed storage cluster, acquiring the physical node in a normal working state in the distributed storage cluster; traversing LUNs in the target equipment consisting of the physical nodes in the normal working state, and retrieving corresponding storage images according to the LUNs; and when the target storage image locked by the physical node in the abnormal working state exists, releasing the lock of the target storage image. Even if a certain physical node works abnormally after locking the storage image of the certain physical node, the method can still perform data read-write operation on the storage image of which the abnormal physical node is locked by other normal physical nodes, so that the overall reliability of the distributed storage cluster data read-write service can be ensured under the condition that the abnormal physical node exists. In addition, the invention also provides a lock release device, equipment and a medium, and the beneficial effects are as above.
Description
Technical Field
The present invention relates to the field of distributed storage, and in particular, to a lock release method, apparatus, device, and medium.
Background
With the advent of the big data era, the importance of data is continuously improved, so that the relatively reliable storage of the data is the basis for ensuring the normal use of the data.
At present, a distributed storage cluster is generally used to store data, the distributed storage cluster is composed of a certain Number of physical nodes, the physical nodes provide physical storage media for the distributed storage cluster, and then a distributed storage system operating in the distributed storage cluster logically divides the physical storage media, and provides Logical block storage devices, that is, Target devices (targets) that can be controlled in the distributed storage system by clients, to client hosts, and further divides storage images (images) in the Target devices to serve as Logical storage units of the data, on this basis, the storage images are described by LUNs (Logical Unit numbers) for identification, and each Target device may have a plurality of LUNs.
In a current application scenario, in order to ensure reliability of reading and writing data in a target device by a client, multiple physical nodes with different IP addresses are often logically divided into the same target device in a redundant manner, and when an abnormal physical node exists, the abnormal physical node is replaced by the current normally operating physical node in an IP address drift manner, and a read-write support for the data is provided for the client. In the process of data reading and writing, a client searches for a corresponding LUN in target equipment of a distributed storage system, so as to map the LUN to a corresponding storage image, and further read and write the storage image, in the process of reading and writing the storage image, in order to ensure the consistency of data, before the data is read and written, the storage image is often locked, after the current physical node locks the storage image, other physical nodes cannot perform data reading and writing operations on the storage image again before the current physical node releases the lock or before the total time of the locking reaches a default timeout period, and under the above conditions, when the physical node is abnormal after the image storage in the physical node is locked, even if the physical node is replaced by a redundant normal physical node, the client cannot perform the data reading and writing operations on the storage image locked by the abnormal physical node through the normal physical node within a long time And performing data read-write operation, so that the overall reliability of the distributed storage cluster data read-write service is difficult to ensure under the condition that abnormal physical nodes exist.
Therefore, it is a problem to be solved by those skilled in the art to provide a lock release method to ensure the overall reliability of the distributed storage cluster data read-write service in the presence of abnormal physical nodes.
Disclosure of Invention
The invention aims to provide a lock release method, a lock release device, lock release equipment and a lock release medium, so as to ensure the overall reliability of a distributed storage cluster data read-write service under the condition that abnormal physical nodes exist.
In order to solve the above technical problem, the present invention provides a lock release method, including:
when a physical node in an abnormal working state exists in the distributed storage cluster, acquiring the physical node in a normal working state in the distributed storage cluster;
traversing LUNs in the target equipment consisting of the physical nodes in the normal working state, and retrieving corresponding storage images according to the LUNs;
and when the target storage image locked by the physical node in the abnormal working state exists, releasing the lock of the target storage image.
Preferably, the acquiring the physical node in the normal working state in the distributed storage cluster includes:
acquiring an IP address list of physical nodes in a normal working state in a distributed storage cluster;
accordingly, when there is a target storage image locked by a physical node in an abnormal operating state, releasing the lock of the target storage image comprises:
when there is a target memory image locked by a target IP address identity outside the IP address list, the lock of the target memory image is released.
Preferably, traversing the LUN in the target device formed by the physical nodes in the normal operating state, and retrieving the corresponding storage image according to the LUN includes:
and traversing the LUN in the target equipment consisting of the physical nodes in the normal working state, and searching the corresponding storage image according to the LUN when the type of the LUN is not the RAID LUN.
Preferably, when there is a target storage image locked by a physical node in an abnormal operating state, releasing the lock of the target storage image includes:
and when the target memory image with the exclusive lock added by the physical node in the abnormal working state exists, releasing the exclusive lock of the target memory image.
In addition, the present invention also provides a lock release device including:
the node acquisition module is used for acquiring the physical nodes in the normal working state in the distributed storage cluster when the physical nodes in the abnormal working state exist in the distributed storage cluster;
the traversal retrieval module is used for traversing the LUN in the target equipment consisting of the physical nodes in the normal working state and retrieving the corresponding storage image according to the LUN;
and the lock releasing module is used for releasing the lock of the target storage image when the target storage image locked by the physical node in the abnormal working state exists.
In addition, the present invention also provides a lock release apparatus including:
a memory for storing a computer program;
a processor for implementing the steps of the lock release method as described above when executing a computer program.
Furthermore, the present invention also provides a computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, realizes the steps of the lock release method as described above.
The lock release method provided by the invention is characterized in that when physical nodes in abnormal working states exist in the distributed storage cluster, the physical nodes in normal working states in the distributed storage cluster are obtained, then the LUN contained in target equipment consisting of the physical nodes in normal working states is traversed, the corresponding storage image is further retrieved according to the LUN, and when the storage image is the target storage image locked by the physical nodes in abnormal working states, the lock of the target storage image is released, so that the target storage image can be used by physical nodes except the abnormal physical nodes. Compared with the prior art, even if a certain physical node works abnormally after locking the storage image of the certain physical node, the method can still perform data reading and writing operation on the storage image of which the abnormal physical node is locked by other normal physical nodes, so that the overall reliability of the distributed storage cluster data reading and writing service can be ensured under the condition that the abnormal physical node exists. In addition, the invention also provides a lock release device, equipment and a medium, and the beneficial effects are as above.
Drawings
In order to more clearly illustrate the embodiments of the present invention, the drawings required for the embodiments will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained by those skilled in the art without inventive effort.
Fig. 1 is a flowchart of a lock release method according to an embodiment of the present invention;
fig. 2 is a structural diagram of a lock release device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative work belong to the protection scope of the present invention.
The core of the invention is to provide a lock release method to ensure the overall reliability of the distributed storage cluster data read-write service under the condition of the existence of abnormal physical nodes. Another core of the present invention is to provide a lock release device, apparatus and medium.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Example one
Fig. 1 is a flowchart of a lock release method according to an embodiment of the present invention. Referring to fig. 1, the specific steps of the lock release method include:
step S10: and when the physical node in the abnormal working state exists in the distributed storage cluster, acquiring the physical node in the normal working state in the distributed storage cluster.
It should be noted that, in this step, when it is determined that the physical node in the abnormal operating state exists in the distributed storage cluster, the physical nodes in the normal operating state in the distributed storage cluster are summarized, and then the physical node in the normal operating state in the distributed storage cluster is obtained. Further, in order to reduce traversal of LUNs in physical nodes unrelated to physical nodes having abnormal operating states and search of corresponding storage images in subsequent steps, the physical nodes in the normal operating state acquired in this step may specifically be physical nodes in the normal operating state, which store the same data content as the physical nodes in the abnormal operating state, that is, physical nodes in the normal operating state that are mutually redundant with the physical nodes in the abnormal operating state.
Step S11: and traversing the LUN in the target equipment consisting of the physical nodes in the normal working state, and searching the corresponding storage image according to the LUN.
It can be understood that, when the client reads and writes the storage image through the physical node, the storage image is often locked based on the physical node, and synchronizes the lock to the same memory image as the physical node to the redundant other physical nodes, thereby avoiding the situation that other clients read and write data of the same memory image through other physical nodes which are redundant with the physical node during the locking process, therefore, when a physical node is abnormal after locking the memory image therein, the corresponding memory image in other physical nodes redundant with the physical node is still in the state of being locked by the abnormal physical node, and the purpose of this step is to traverse the LUN in the target device of a properly functioning physical node, and then the corresponding storage image is found through the LUN, and whether the storage image is locked by the physical node in the abnormal working state or not is judged in the subsequent steps according to the storage image. It should be noted that, since the number of the logical target devices divided based on the physical node is determined according to the specific requirements of the actual application scenario, the number of the target devices is not specifically limited herein, and when the number of the target devices in the physical node is greater than 1, the step needs to traverse all the target devices in the physical node.
Step S12: and when the target storage image locked by the physical node in the abnormal working state exists, releasing the lock of the target storage image.
It can be understood that, when the LUN in the target device of the normally operating physical node is traversed, and then the corresponding storage image is found through the LUN, and it is determined that the storage image has been locked by the physical node in the abnormal operating state, the lock is released, so as to ensure that other normally operating physical nodes can still continue to perform read-write operation on the storage image.
The lock release method provided by the invention is characterized in that when physical nodes in abnormal working states exist in the distributed storage cluster, the physical nodes in normal working states in the distributed storage cluster are obtained, then the LUN contained in target equipment consisting of the physical nodes in normal working states is traversed, the corresponding storage image is further retrieved according to the LUN, and when the storage image is the target storage image locked by the physical nodes in abnormal working states, the lock of the target storage image is released, so that the target storage image can be used by physical nodes except the abnormal physical nodes. Compared with the prior art, even if a certain physical node works abnormally after locking the storage image of the certain physical node, the method can still perform data reading and writing operation on the storage image of which the abnormal physical node is locked by other normal physical nodes, so that the overall reliability of the distributed storage cluster data reading and writing service can be ensured under the condition that the abnormal physical node exists.
Example two
On the basis of the above examples, the present invention also provides a series of preferred embodiments as follows.
As a preferred embodiment, the acquiring physical nodes in a normal operating state in the distributed storage cluster includes:
and acquiring an IP address list of the physical nodes in the normal working state in the distributed storage cluster.
Accordingly, when there is a target storage image locked by a physical node in an abnormal operating state, releasing the lock of the target storage image comprises:
when there is a target memory image locked by a target IP address identity outside the IP address list, the lock of the target memory image is released.
It should be noted that, since it is considered that, in practical applications, each physical node constituting the distributed storage cluster is often configured with a corresponding IP address in advance, and the IP addresses of the physical nodes are different from each other, so as to ensure that the identities of the physical nodes in the distributed storage cluster are unique, therefore, the IP addresses can be used as the basis for identifying the physical nodes in the embodiment, when the physical node in the abnormal working state exists in the distributed storage cluster, an IP address list formed by the IP addresses of the physical nodes in the normal working state in the distributed storage cluster is obtained, when the LUN in the target device formed by the physical nodes in the normal working state is traversed and the corresponding storage image is searched according to the LUN, when a target memory image locked by a target IP address identity outside the IP address list exists, the lock of the target memory image is released. The embodiment can relatively improve the accuracy of distinguishing the physical node by determining the identity of the physical node and the identity of the physical node encrypted by the storage image through the IP address, thereby ensuring the accuracy of lock release.
Furthermore, as a preferred embodiment, traversing the LUN in the target device formed by the physical nodes in the normal operating state, and retrieving the corresponding storage image according to the LUN includes:
and traversing the LUN in the target equipment consisting of the physical nodes in the normal working state, and searching the corresponding storage image according to the LUN when the type of the LUN is not the RAID LUN.
It should be noted that, in a specific application scenario, there may be a situation where a RAID LUN exists in a target device, and the RAID LUN does not have a corresponding storage image, so that detecting an error of the RAID LUN based on the corresponding storage image increases the overall time overhead of the lock release process.
On the basis of the above-described series of embodiments, as a preferred embodiment, when there is a target storage image locked by a physical node in an abnormal operating state, releasing the lock of the target storage image includes:
and when the target memory image with the exclusive lock added by the physical node in the abnormal working state exists, releasing the exclusive lock of the target memory image.
It should be noted that, in the present embodiment, the type of lock is limited to exclusive lock, and the exclusive lock has high stability and wide applicability, so that the reliability of locking the memory image can be ensured.
EXAMPLE III
In the above, the embodiments of the lock release method are described in detail, and the present invention further provides a lock release device corresponding to the method.
Fig. 2 is a structural diagram of a lock release device according to an embodiment of the present invention. The lock release device provided by the embodiment of the invention comprises:
the node obtaining module 10 is configured to obtain a physical node in a normal working state in the distributed storage cluster when the physical node in the abnormal working state exists in the distributed storage cluster.
And the traversal retrieval module 11 is configured to traverse the LUN in the target device formed by the physical nodes in the normal operating state, and retrieve the corresponding storage image according to the LUN.
And the lock releasing module 12 is configured to release the lock of the target storage image when the target storage image locked by the physical node in the abnormal operating state exists.
When the physical node in the abnormal working state exists in the distributed storage cluster, the lock release device acquires the physical node in the normal working state in the distributed storage cluster, further traverses the LUN contained in the target equipment consisting of the physical node in the normal working state, further retrieves the corresponding storage image according to the LUN, and releases the lock of the target storage image when the storage image is the target storage image locked by the physical node in the abnormal working state, so as to ensure that the target storage image can be used by the physical nodes except the abnormal physical node. Compared with the prior art, even if a certain physical node works abnormally after locking the storage image of the certain physical node, the device can still perform data read-write operation on the storage image of which the abnormal physical node is locked by other normal physical nodes, so that the overall reliability of the distributed storage cluster data read-write service can be ensured under the condition that the abnormal physical node exists.
Example four
In addition, the present invention also provides a lock release apparatus including:
a memory for storing a computer program;
a processor for implementing the steps of the lock release method as described above when executing the computer program.
When the physical node in the abnormal working state exists in the distributed storage cluster, the lock release device acquires the physical node in the normal working state in the distributed storage cluster, further traverses the LUN contained in the target device formed by the physical node in the normal working state, further retrieves the corresponding storage image according to the LUN, and releases the lock of the target storage image when the storage image is the target storage image locked by the physical node in the abnormal working state, so as to ensure that the target storage image can be used by the physical nodes except the abnormal physical node. Compared with the prior art, even if a certain physical node works abnormally after locking the storage image of the certain physical node, the equipment can still perform data read-write operation on the storage image of which the abnormal physical node is locked by other normal physical nodes, so that the overall reliability of the distributed storage cluster data read-write service can be ensured under the condition that the abnormal physical node exists.
Furthermore, the present invention also provides a computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, realizes the steps of the lock release method as described above.
The computer readable storage medium provided by the invention, when a physical node in an abnormal working state exists in a distributed storage cluster, obtains the physical node in a normal working state in the distributed storage cluster, further traverses an LUN contained in a target device formed by the physical node in the normal working state, further searches a corresponding storage image according to the LUN, and releases the lock of the target storage image when the storage image is the target storage image locked by the physical node in the abnormal working state, so that the target storage image can be used by physical nodes except the abnormal physical node. Compared with the prior art, even if a certain physical node works abnormally after locking the storage image of the physical node, the computer readable storage medium can still perform data read-write operation on the storage image of which the abnormal physical node is locked by other normal physical nodes, so that the overall reliability of the distributed storage cluster data read-write service can be ensured under the condition that the abnormal physical node exists.
The above detailed description is provided for a lock release method, apparatus, device and medium provided by the present invention. The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
It should also be noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Claims (7)
1. A lock release method, comprising:
when a physical node in an abnormal working state exists in a distributed storage cluster, acquiring the physical node in a normal working state in the distributed storage cluster;
traversing the LUN in the target equipment formed by the physical nodes in the normal working state, and retrieving the corresponding storage image according to the LUN;
and when the target storage image locked by the physical node in the abnormal working state exists, releasing the lock of the target storage image.
2. The method of claim 1, wherein the obtaining the physical nodes in the distributed storage cluster in a normal operating state comprises:
acquiring an IP address list of the physical node in a normal working state in the distributed storage cluster;
correspondingly, when there is a target storage image locked by the physical node in the abnormal working state, releasing the lock of the target storage image comprises:
and when a target memory image locked by the target IP address identity outside the IP address list exists, releasing the lock of the target memory image.
3. The method of claim 1, wherein traversing the LUN in the target device formed by the physical nodes in the normal operating state and retrieving the corresponding storage image according to the LUN comprises:
traversing the LUN in the target equipment formed by the physical nodes in the normal working state, and when the type of the LUN is not a RAID LUN, retrieving the corresponding storage image according to the LUN.
4. The method according to any one of claims 1 to 3, wherein releasing the lock of the target storage image when there is the target storage image locked by the physical node in the abnormal working state comprises:
and when the target memory image with the exclusive lock added by the physical node in the abnormal working state exists, releasing the exclusive lock of the target memory image.
5. A lock release device, comprising:
the node acquisition module is used for acquiring a physical node in a normal working state in the distributed storage cluster when the physical node in an abnormal working state exists in the distributed storage cluster;
the traversal retrieval module is used for traversing the LUN in the target equipment formed by the physical nodes in the normal working state and retrieving the corresponding storage image according to the LUN;
and the lock releasing module is used for releasing the lock of the target storage image when the target storage image locked by the physical node in the abnormal working state exists.
6. A lock release device, comprising:
a memory for storing a computer program;
a processor for implementing the steps of the lock release method according to any one of claims 1 to 4 when executing the computer program.
7. A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, which computer program, when being executed by a processor, carries out the steps of the lock release method according to any one of claims 1 to 4.
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| CN103731485A (en) * | 2013-12-26 | 2014-04-16 | 华为技术有限公司 | Network equipment, cluster storage system and distributed lock management method |
| CN108959390A (en) * | 2018-06-01 | 2018-12-07 | 新华三云计算技术有限公司 | Resource-area synchronous method and device after shared-file system node failure |
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| CN103731485A (en) * | 2013-12-26 | 2014-04-16 | 华为技术有限公司 | Network equipment, cluster storage system and distributed lock management method |
| CN108959390A (en) * | 2018-06-01 | 2018-12-07 | 新华三云计算技术有限公司 | Resource-area synchronous method and device after shared-file system node failure |
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