CN115826880B - Local caching method, device, system, medium and equipment of object storage system - Google Patents
Local caching method, device, system, medium and equipment of object storage system Download PDFInfo
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Abstract
The application discloses a local caching method, a device, a system, a medium computer readable storage and electronic equipment of an object storage system, wherein a write operation instruction is received; the write operation instruction comprises a delete operation and a new operation; according to the writing operation instruction, searching the identity information of the corresponding storage barrel; locking the corresponding storage barrel according to the identity information; writing the storage barrel subjected to locking operation; after receiving the writing operation instruction, searching a corresponding storage barrel according to the identity information in the writing operation instruction, locking the storage barrel, and writing the storage barrel after the locking operation to ensure that the next operation can be executed after the writing operation is executed, so as to realize the strong consistency of the local cache.
Description
Technical Field
The present invention relates to the technical field of object storage systems, and in particular, to a local caching method, device, system, medium computer readable storage and electronic device for an object storage system.
Background
When the object storage system manages the socket (storage bucket), the name of the socket is unique, all related operations in the object storage system need to be continued by means of the socket name sent by the front end, the information such as the id of the socket and the id of the bound user is obtained by inquiring the database, and the information is hardly changed. Because the object storage system has the characteristics of more reading and less writing, the id part of the socket must ensure strong consistency, and other attributes allow the final consistency to be ensured.
Since the bucket id relates to most functions such as bucket management and object uploading in the system, strong consistency with names must be ensured, which makes the prior art unable to use the existing local caching scheme to further improve the caching performance. The existing local cache consistency solution generally uses a publish-subscribe mechanism to notify each node of cache change, delay exists, only final consistency can be ensured, and strong consistency cannot be ensured.
At this time, a high-performance cache scheme with strong consistency capability is urgently needed to be responsible for maintaining the corresponding relation between the name of the socket and the metadata such as the id of the socket, and meanwhile, multiple concurrent control means are used to solve the cache consistency problem caused by the action of concurrently executing deletion of key information related to newly-built identical-name sockets (the names of the identical-name sockets created before and after are identical but the ids are different).
Disclosure of Invention
The present application has been made in order to solve the above technical problems. The embodiment of the application provides a local caching method, a device, a system and a medium computer readable storage and electronic equipment of an object storage system, and solves the technical problems.
According to one aspect of the present application, there is provided a local caching method of an object storage system, including: receiving a write operation instruction; the write operation instruction comprises a delete operation and a new operation; searching the identity information of the corresponding storage barrel according to the writing operation instruction; according to the identity information, locking the corresponding storage barrel; and performing writing operation on the storage barrel after the locking operation is performed.
In an embodiment, when the write operation instruction is the delete operation, the writing the bucket after the locking operation includes: deleting the storage barrel after locking operation is performed in the database of the object storage system; and deleting the storage barrel after locking operation in the local cache.
In an embodiment, when the write operation instruction is the new operation, the writing the bucket after the locking operation includes: deleting the content of the storage barrel subjected to locking operation in the local cache of the object storage system; and creating a bucket in a database of the object storage system.
In one embodiment, after the writing operation is performed on the bucket after the locking operation, the local caching method of the object storage system further includes: and unlocking the storage barrel after locking.
In an embodiment, the locking the corresponding bucket according to the identity information includes: and according to the identity information, locking the corresponding storage barrel by adopting a distributed lock.
In one embodiment, the writing the bucket after the locking operation includes: serializing the write operation; and performing writing operation on the storage barrel after the locking operation is performed.
According to another aspect of the present application, there is provided a local caching device of an object storage system, including: the receiving module is used for receiving the writing operation instruction; the write operation instruction comprises a delete operation and a new operation; the searching module is used for searching the identity information of the corresponding storage barrel according to the writing operation instruction; the locking module is used for locking the corresponding storage barrel according to the identity information; and the execution module is used for performing write operation on the storage barrel after the locking operation is performed.
According to another aspect of the present application, there is provided a local caching system of an object storage system, including: a database comprising a plurality of memory buckets; the local cache module comprises a plurality of storage barrels; a local caching device as described above; the local caching device is in communication connection with the database and the local caching module.
According to another aspect of the present application, there is provided a computer readable storage medium storing a computer program for executing the local caching method of any one of the above object storage systems.
According to another aspect of the present application, there is provided an electronic device including: a processor; a memory for storing the processor-executable instructions; the processor is configured to execute the local caching method of the object storage system described in any one of the above.
The application provides a local caching method, a device, a system, a medium computer readable storage and an electronic device of an object storage system, wherein the method, the device, the system, the medium computer readable storage and the electronic device are used for receiving a write operation instruction; the write operation instruction comprises a delete operation and a new operation; according to the writing operation instruction, searching the identity information of the corresponding storage barrel; locking the corresponding storage barrel according to the identity information; writing the storage barrel subjected to locking operation; after receiving the writing operation instruction, searching a corresponding storage barrel according to the identity information in the writing operation instruction, locking the storage barrel, and writing the storage barrel after the locking operation to ensure that the next operation can be executed after the writing operation is executed, so as to realize the strong consistency of the local cache.
Drawings
The foregoing and other objects, features and advantages of the present application will become more apparent from the following more particular description of embodiments of the present application, as illustrated in the accompanying drawings. The accompanying drawings are included to provide a further understanding of embodiments of the application and are incorporated in and constitute a part of this specification, illustrate the application and not constitute a limitation to the application. In the drawings, like reference numerals generally refer to like parts or steps.
Fig. 1 is a flowchart of a local caching method of an object storage system according to an exemplary embodiment of the present application.
Fig. 2 is a flowchart of a local caching method of an object storage system according to another exemplary embodiment of the present application.
Fig. 3 is a flowchart of a local caching method of an object storage system according to another exemplary embodiment of the present application.
Fig. 4 is a flowchart of a local caching method of an object storage system according to another exemplary embodiment of the present application.
Fig. 5 is a schematic structural diagram of a local caching device of an object storage system according to an exemplary embodiment of the present application.
Fig. 6 is a schematic structural diagram of a local caching device of an object storage system according to another exemplary embodiment of the present application.
Fig. 7 is a block diagram of an electronic device according to an exemplary embodiment of the present application.
Detailed Description
Hereinafter, example embodiments according to the present application will be described in detail with reference to the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application and not all of the embodiments of the present application, and it should be understood that the present application is not limited by the example embodiments described herein.
For an object storage system without a central database, taking an open source object storage minio as an example, distinguishing the pockets without using ids, and not repeatedly checking in advance when creating the pockets, and judging whether the creation is successful or not by carrying out IO once in a mode of creating a folder on each block of disk according to the pocket name, and identifying whether the pockets exist or not by means of an underlying file system. The system adopts a decentralised shared-free architecture, most information and metadata are locally stored by virtue of a disk, and a single-point final execution result is often obtained to confirm success and failure of a request.
Because the id of the socket relates to most functions such as barrel management, object uploading and the like in the system, strong consistency with names needs to be ensured, so that the existing local caching scheme can use a publish-subscribe mechanism to inform the cache change of each node, delay exists, and only final consistency can be ensured, but strong consistency cannot be ensured.
In order to solve the problem of strong consistency in the local caching scheme, the application provides a local caching method, a device, a system, a medium and electronic equipment of an object storage system, and the implementation mode of the application is specifically described below with reference to the accompanying drawings.
Fig. 1 is a flowchart of a local caching method of an object storage system according to an exemplary embodiment of the present application. As shown in fig. 1, the local caching method of the object storage system includes the following steps:
step 110: and receiving a write operation instruction.
The write operation instruction comprises a delete operation and a new operation. Considering that the id of the socket in the object store must guarantee strong consistency of the cache, other attributes of the socket (such as multi-version control state) only need to guarantee final consistency. And only the operations of deleting and newly creating the socket can influence the id of the socket, so that the problem of strong consistency can be only involved when a write operation instruction is received. According to the method and the device, information such as the id of the socket is stored by using the local cache, the redis cache is replaced, other caches are unchanged, the watch mechanism of the etcd is used, and the synchronous cache of the publishing and subscribing functions required by the local cache is normally realized, so that the final consistency except for the writing operation is met.
Step 120: and searching the identity information of the corresponding storage barrel according to the writing operation instruction.
And searching the id information of the corresponding socket according to the id of the socket related to the write operation instruction, thereby determining the object needing write operation.
Step 130: and locking the corresponding storage barrel according to the identity information.
In one embodiment, the specific implementation of step 130 may be: and according to the identity information, locking the corresponding storage barrel by adopting the distributed lock. When the same-name socket is deleted or created concurrently, the situation that ids corresponding to the same socket name in each local cache are different in new and old is caused, and strong consistency is lost. The method and the device perform locking operation on the socket by adopting the distributed lock so as to serialize the deleting and creating operations of the socket with the same name.
Step 140: and performing writing operation on the storage barrel subjected to locking operation.
In one embodiment, the specific implementation of step 140 may be: the write operation is serialized and the write operation is performed on the bucket after the lock operation is performed. When deleting and creating, firstly applying for the lock of the socket name from the etcd, serializing the deleting and creating operation of the same socket, ensuring that the last operation completely empties each local cache and then continues, thereby realizing strong consistency.
The local caching method of the object storage system is characterized by receiving a write operation instruction; the write operation instruction comprises a delete operation and a new operation; according to the writing operation instruction, searching the identity information of the corresponding storage barrel; locking the corresponding storage barrel according to the identity information; writing the storage barrel subjected to locking operation; after receiving the writing operation instruction, searching a corresponding storage barrel according to the identity information in the writing operation instruction, locking the storage barrel, and writing the storage barrel after the locking operation to ensure that the next operation can be executed after the writing operation is executed, so as to realize the strong consistency of the local cache.
Fig. 2 is a flowchart of a local caching method of an object storage system according to another exemplary embodiment of the present application. When the write operation instruction is a delete operation, as shown in fig. 2, the step 140 includes:
step 141: and deleting the storage barrel after locking operation in the database of the object storage system.
Step 142: and deleting the storage barrel subjected to locking operation in the local cache.
When deleting, firstly applying for the lock of the socket name to the etcd, serializing the deleting operation of the same socket, firstly deleting the database, then notifying the deleting cache, ensuring that the last operation completely empties each local cache and then continues, thereby realizing strong consistency.
Fig. 3 is a flowchart of a local caching method of an object storage system according to another exemplary embodiment of the present application. When the write operation instruction is a new operation, as shown in fig. 3, the step 140 includes:
step 143: deleting the content of the storage barrel subjected to locking operation in the local cache of the object storage system.
Step 144: a bucket is created in a database of the object storage system.
When the method is used for creating, firstly, a lock of a socket name is applied to the etcd, so that creation operation related to the same socket is serialized, and firstly, a deletion cache is notified, a period of time is waited for, a possible last deleted cache of the socket with the same name is eliminated, then database creation is carried out, and the fact that the last operation completely empties each local cache is continued is ensured, so that strong consistency is realized.
Fig. 4 is a flowchart of a local caching method of an object storage system according to another exemplary embodiment of the present application. As shown in fig. 4, after step 140, the local caching method of the object storage system may further include:
step 150: and unlocking the storage barrel after locking.
After the delete or create operation is completed, the lock is released for the next operation. The two operations of the socket with the same name are serialized, and the local cache which is only finally consistent originally is waited for reaching the final consistency, and then the next change operation is carried out, so that the strong consistency is achieved. Since the operations on a socket in the actual object storage scenario are read-many-write-few, and only create/delete will lock this socket, this serialization has little impact on performance. In the scene of more reading and less writing, the local cache is used for replacing the distributed cache represented by redis, so that the response speed is further improved, IO times for inquiring a database or a file are reduced, the distributed lock is used for guaranteeing serialization of deletion and creation, the database is deleted firstly and then the cache is updated when the database is deleted, the cache is deleted firstly and then the cache is created when the database is created, and the operations are executed in series, so that the strong consistency of the local cache is guaranteed to reach the scene requirement.
Fig. 5 is a schematic structural diagram of a local caching device of an object storage system according to an exemplary embodiment of the present application. As shown in fig. 5, the local caching device 50 includes: a receiving module 51, configured to receive a write operation instruction; the write operation instruction comprises a delete operation and a new operation; the searching module 52 is configured to search the identity information of the corresponding bucket according to the write operation instruction; the locking module 53 is configured to perform locking operation on the corresponding storage bucket according to the identity information; and an execution module 54, configured to perform a write operation on the bucket after the locking operation is performed.
The local caching device of the object storage system receives a write operation instruction through a receiving module 51; the write operation instruction comprises a delete operation and a new operation; the searching module 52 searches the identity information of the corresponding storage barrel according to the writing operation instruction; the locking module 53 performs locking operation on the corresponding storage barrel according to the identity information; and the execution module 54 performs a write operation on the bucket after the locking operation is performed; after receiving the writing operation instruction, searching a corresponding storage barrel according to the identity information in the writing operation instruction, locking the storage barrel, and writing the storage barrel after the locking operation to ensure that the next operation can be executed after the writing operation is executed, so as to realize the strong consistency of the local cache.
In an embodiment, the locking module 53 may be further configured to: and according to the identity information, locking the corresponding storage barrel by adopting the distributed lock.
In one embodiment, execution module 54 may be further configured to: the write operation is serialized and the write operation is performed on the bucket after the lock operation is performed.
Fig. 6 is a schematic structural diagram of a local caching device of an object storage system according to another exemplary embodiment of the present application. As shown in fig. 6, the execution module 54 may include: and the deleting unit 541 is configured to perform a deleting operation on the bucket after the locking operation is performed in the database of the object storage system, and perform a deleting operation on the bucket after the locking operation is performed in the local cache.
In one embodiment, as shown in fig. 6, the execution module 54 may include: and a creating unit 542 configured to delete the content of the bucket after the locking operation in the local cache of the object storage system, and create the bucket in the database of the object storage system.
In an embodiment, as shown in fig. 6, the local caching device 50 may further include: and the unlocking module 55 is used for unlocking the storage barrel after the locking operation.
The application also provides a local cache system of the object storage system, which comprises: a database comprising a plurality of memory buckets; the local cache module comprises a plurality of storage barrels; a local caching device as described above; the local caching device is in communication connection with the database and the local caching module.
The local cache system of the object storage system receives a write operation instruction; the write operation instruction comprises a delete operation and a new operation; according to the writing operation instruction, searching the identity information of the corresponding storage barrel; locking the corresponding storage barrel according to the identity information; writing the storage barrel subjected to locking operation; after receiving the writing operation instruction, searching a corresponding storage barrel according to the identity information in the writing operation instruction, locking the storage barrel, and writing the storage barrel after the locking operation to ensure that the next operation can be executed after the writing operation is executed, so as to realize the strong consistency of the local cache.
Next, an electronic device according to an embodiment of the present application is described with reference to fig. 7. The electronic device may be either or both of the first device and the second device, or a stand-alone device independent thereof, which may communicate with the first device and the second device to receive the acquired input signals therefrom.
Fig. 7 illustrates a block diagram of an electronic device according to an embodiment of the present application.
As shown in fig. 7, the electronic device 10 includes one or more processors 11 and a memory 12.
The processor 11 may be a Central Processing Unit (CPU) or other form of processing unit having data processing and/or instruction execution capabilities, and may control other components in the electronic device 10 to perform desired functions.
Memory 12 may include one or more computer program products that may include various forms of computer-readable storage media, such as volatile memory and/or non-volatile memory. The volatile memory may include, for example, random Access Memory (RAM) and/or cache memory (cache), and the like. The non-volatile memory may include, for example, read Only Memory (ROM), hard disk, flash memory, and the like. One or more computer program instructions may be stored on the computer readable storage medium that can be executed by the processor 11 to implement the methods of the various embodiments of the present application described above and/or other desired functions. Various contents such as an input signal, a signal component, a noise component, and the like may also be stored in the computer-readable storage medium.
In one example, the electronic device 10 may further include: an input device 13 and an output device 14, which are interconnected by a bus system and/or other forms of connection mechanisms (not shown).
When the electronic device is a stand-alone device, the input means 13 may be a communication network connector for receiving the acquired input signals from the first device and the second device.
In addition, the input device 13 may also include, for example, a keyboard, a mouse, and the like.
The output device 14 may output various information to the outside, including the determined distance information, direction information, and the like. The output means 14 may include, for example, a display, speakers, a printer, and a communication network and remote output devices connected thereto, etc.
Of course, only some of the components of the electronic device 10 that are relevant to the present application are shown in fig. 7 for simplicity, components such as buses, input/output interfaces, etc. are omitted. In addition, the electronic device 10 may include any other suitable components depending on the particular application.
The computer program product may write program code for performing the operations of embodiments of the present application in any combination of one or more programming languages, including an object oriented programming language such as Java, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device, partly on a remote computing device, or entirely on the remote computing device or server.
The computer readable storage medium may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium may include, for example, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium would include the following: an electrical connection having one or more wires, a portable disk, a hard disk, random Access Memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
The foregoing description has been presented for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of the application to the form disclosed herein. Although a number of example aspects and embodiments have been discussed above, a person of ordinary skill in the art will recognize certain variations, modifications, alterations, additions, and subcombinations thereof.
Claims (6)
1. A method for local caching of an object storage system, comprising:
the identity information of a storage bucket of the local cache is used for replacing a redis cache, the rest caches are unchanged, and a watch mechanism of the etcd is used for realizing synchronous cache of a publishing and subscribing function required by the local cache;
receiving a write operation instruction; the write operation instruction comprises a delete operation and a new operation;
searching the identity information of the corresponding storage barrel according to the writing operation instruction;
according to the identity information, a distributed lock is adopted to lock the corresponding storage barrel; and
writing the storage barrel subjected to locking operation;
the writing operation on the storage barrel after locking operation comprises the following steps:
serializing the write operation; and
writing the storage barrel subjected to locking operation;
and when the write operation instruction is the delete operation, performing write operation on the storage barrel after locking operation includes:
deleting the storage barrel after locking operation is performed in the database of the object storage system; and
deleting the storage barrel subjected to locking operation in the local cache;
when the write operation instruction is the new operation, the writing operation on the storage barrel after locking operation includes:
deleting the content of the storage barrel subjected to locking operation in the local cache of the object storage system; and
a bucket is created in a database of the object storage system.
2. The local caching method of an object storage system according to claim 1, wherein after the writing operation is performed on the bucket after the locking operation, the local caching method of an object storage system further comprises:
and unlocking the storage barrel after locking.
3. A local caching device of an object storage system, comprising:
the receiving module is used for receiving the writing operation instruction; the identity information of a storage barrel is stored by using a local cache to replace a redis cache, the rest caches are unchanged, and a watch mechanism of the etcd is used for realizing synchronous cache of a publishing and subscribing function required by the local cache; the write operation instruction comprises a delete operation and a new operation;
the searching module is used for searching the identity information of the corresponding storage barrel according to the writing operation instruction;
the locking module is used for locking the corresponding storage barrel by adopting a distributed lock according to the identity information; and
the execution module is used for performing write operation on the storage barrel after the locking operation is performed; the writing operation on the storage barrel after locking operation comprises the following steps: serializing the write operation; and performing writing operation on the storage barrel after locking operation; and when the write operation instruction is the delete operation, performing write operation on the storage barrel after locking operation includes: deleting the storage barrel after locking operation is performed in the database of the object storage system; and deleting the storage barrel after locking operation in the local cache; when the write operation instruction is the new operation, the writing operation on the storage barrel after locking operation includes: deleting the content of the storage barrel subjected to locking operation in the local cache of the object storage system; and creating a bucket in a database of the object storage system.
4. A local cache system for an object storage system, comprising:
a database comprising a plurality of memory buckets;
the local cache module comprises a plurality of storage barrels; and
a local caching device as claimed in claim 3; the local caching device is in communication connection with the database and the local caching module.
5. A computer readable storage medium, characterized in that the storage medium stores a computer program for executing the local caching method of the object storage system of any one of the preceding claims 1 to 2.
6. An electronic device, comprising:
a processor;
a memory for storing the processor-executable instructions;
the processor is configured to perform the local caching method of the object storage system according to any one of claims 1 to 2.
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| CN108959405B (en) * | 2018-06-06 | 2021-08-17 | 深圳市远行科技股份有限公司 | Strong consistency reading method of data and terminal equipment |
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| US20190384495A1 (en) * | 2018-06-19 | 2019-12-19 | Trilio Data, Inc. | Object Store Backup Method and System |
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