CN107633102A - A kind of method, apparatus, system and equipment for reading metadata - Google Patents
A kind of method, apparatus, system and equipment for reading metadata Download PDFInfo
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- CN107633102A CN107633102A CN201711021012.2A CN201711021012A CN107633102A CN 107633102 A CN107633102 A CN 107633102A CN 201711021012 A CN201711021012 A CN 201711021012A CN 107633102 A CN107633102 A CN 107633102A
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Abstract
The invention discloses a kind of method, apparatus, system, equipment and computer-readable recording medium for reading metadata, methods described includes：Receive the request of the metadata for the reading file destination that client is sent；The file related to the file destination is determined according to the file destination of the request；Read the metadata of the file destination, and the metadata of the file related to the file destination and cache to the client.Using the above method, it is possible to increase read the efficiency of the metadata of file, disposably read the metadata of multiple files, can avoid reading the metadata of file repeatedly, improve the efficiency and performance for reading file, saved resource, improved the efficiency of system operation.Meanwhile a kind of device, system, equipment and computer-readable recording medium for reading metadata disclosed by the invention, similarly with above-mentioned technique effect.
Description
Technical field
The present invention relates to file system technology field, more specifically to a kind of method, apparatus for reading metadata,
System, equipment and computer-readable recording medium.
Background technology
As mobile Internet and developing rapidly for big data concept emerge, it is necessary to which the data volume of storage is just with geometric progression
Increase, the explosive growth of data volume and the increasingly refinement of data type, the even more small quantity of documents of KB levels is also increasingly
It is more.
At present, when file is read in distributed file system, because consumer process and storage medium are often distributed in not
Same node, causes I/O path longer.And read file every time and be required in cluster network inter access metadata, in some instances it may even be possible to
Across a network is needed to read metadata, the metadata that across a network reads file increases the time delay that file is read.When Documents Comparison is big,
Its read access time is longer, and it is smaller that it reads time the accounting in the read access time of whole file of metadata；When file is smaller
When, its corresponding read access time has been reduced, but reads time the accounting in the read access time of whole file of its metadata
Than particularly evident.Therefore, in the reading scene of mass small documents, the reading of file metadata ties down file reading performance
Become apparent.
Therefore, during mass small documents are read, the read access time of the metadata of file how is reduced, improves magnanimity
The reading performance of small documents, it is that those skilled in the art need to solve the problems, such as.
The content of the invention
It is an object of the invention to a kind of method, apparatus, system, equipment and computer-readable storage medium for reading metadata
Matter, to realize the read access time for the metadata for reducing file, improve the reading performance of mass small documents.
To achieve the above object, the embodiments of the invention provide following technical scheme：
A kind of method for reading metadata, including：
Receive the request of the metadata for the reading file destination that client is sent；
The file related to the file destination is determined according to the file destination of the request；
Read the metadata of the file destination, and the metadata of the file related to the file destination and cache extremely
The client.
Wherein, the file related to the file destination according to the determination of the file destination of the request, including：
According in the catalogue where the file destination of the request, and the catalogue file offset determine with it is described
The related file of file destination.
Wherein, the metadata for reading the file destination, and first number of the file related to the file destination
According to and cache to the client, including：
The asynchronous metadata for reading the file destination, and the metadata of the file related to the file destination and delay
Deposit to the client.
Wherein, before the client sends the request for the metadata for reading file destination, in addition to；
The client judges whether to be cached with the metadata of the file destination；
If so, then the client reads the metadata of the file destination；
If it is not, then request to service end, the service end for the metadata that file destination is read in the client transmission is held
The step of request of the row metadata for receiving the reading file destination that client is sent.
A kind of device for reading metadata, including：
Receiving module, the request of the metadata of the reading file destination for receiving client transmission；
Determining module, for determining the file related to the file destination according to the file destination of the request；
Read module, for reading the metadata of the file destination, and the file related to the file destination
Metadata is simultaneously cached to the client.
Wherein, the determining module is specifically used for：
According in the catalogue where the file destination of the request, and the catalogue file offset determine with it is described
The related file of file destination.
Wherein, the read module is specifically used for：
The asynchronous metadata for reading the file destination, and the metadata of the file related to the file destination and delay
Deposit to the client.
A kind of system for reading metadata, including：
Client, for sending the request for the metadata for reading file destination；
Service end, the request of the metadata of the reading file destination sent for receiving the client；Asked according to described
The file destination asked determines the file related to the file destination；Read the metadata of the file destination, and with it is described
The metadata of the related file of file destination is simultaneously cached to the client.
A kind of equipment for reading metadata, including：
Memory, the program of metadata is read for storing；
Processor, reading metadata described in above-mentioned any one is realized during program for performing the reading metadata
Method the step of.
A kind of computer-readable recording medium, the journey for reading metadata is stored with the computer-readable recording medium
Sequence, the program for reading metadata realize the method for the reading metadata described in above-mentioned any one when being executed by processor
Step.
By above scheme, a kind of method for reading metadata provided in an embodiment of the present invention, methods described includes：
Receive the request of the metadata for the reading file destination that client is sent；Determined and the mesh according to the file destination of the request
Mark the related file of file；Read the metadata of the file destination, and first number of the file related to the file destination
According to and cache to the client.
It can be seen that the above method receive client transmission reading file destination metadata request after, according to described
The file destination of request determines the file related to the file destination, the metadata of these files and the member of the file destination
Data storage has certain correlation in same catalogue file with file destination；Finally read first number of the file destination
According to, and the metadata of the file related to the file destination and cache to the client.By the above method, reading
While the metadata of file destination, the metadata of the alternative document related to file destination is read, improves and reads file
The efficiency of metadata；During reading mass small documents especially in distributed file system, multiple seas are disposably read
The metadata of small documents is measured, can avoid reading the metadata of mass small documents repeatedly from distributed file system；And it will read
For the metadata cache of these files arrived to client, the efficiency of mass small documents is read in raising that can be effective, and then
The performance for reading mass small documents is improved, reduces the unnecessary wasting of resources, improves the efficiency of system operation.
Accordingly, it is provided in an embodiment of the present invention a kind of to read the device of metadata, system, equipment and computer-readable deposit
Storage media, similarly with above-mentioned technique effect.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is a kind of method flow diagram for reading metadata disclosed in the embodiment of the present invention；
Fig. 2 is another method flow diagram for reading metadata disclosed in the embodiment of the present invention；
Fig. 3 is a kind of schematic device for reading metadata disclosed in the embodiment of the present invention；
Fig. 4 is a kind of system schematic for reading metadata disclosed in the embodiment of the present invention；
Fig. 5 is a kind of equipment schematic diagram for reading metadata disclosed in the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
The embodiment of the invention discloses a kind of method, apparatus, system, equipment and computer-readable storage for reading metadata
Medium, to realize the read access time for the metadata for reducing file, improve the reading performance of mass small documents.
Referring to Fig. 1, a kind of method for reading metadata provided in an embodiment of the present invention, including：
S101, the request for receiving the metadata for reading file destination that client is sent；
Specifically, when client needs to read a file, it is necessary to read the metadata of this document first.In a distributed manner
Exemplified by file system, when client reads file destination, sent to distributed file system read the file destination first
The request of metadata, when distributed file system receives the request, the metadata of file destination is just read according to the request,
And send the metadata to the client for reading file destination, so that the client reads target text according to the metadata
Part.
S102, the file related to the file destination is determined according to the file destination of the request；
Specifically, in distributed file system, the metadata of associated documents is generally stored in same storage location.For
The storage of the metadata of mass small documents, in order to save memory space, typically by first number of the mass small documents with correlation
Stored according to piecemeal.So request of the distributed file system in the metadata for the reading file destination for receiving client transmission
When, some files related to the file destination can be determined according to the file destination.
It should be noted that the storage catalogue of the metadata of file has certain numbering, such as:First number of file destination
According to numbering be 1, then according to the numbering 1 then can determine numbering be a series of files such as 2,3,4 metadata.Wherein,
According to the number of users of file determined by the file destination can sets itself as needed, such as：Certain client is set
10 files can be determined according to file destination, it is assumed that numbering of the metadata of the file destination in storage catalogue is 1, then
The metadata for the file that numbering is 2 to 11 can then be determined.
S103, the metadata for reading the file destination, and the file related to the file destination metadata simultaneously
Cache to the client.
Specifically, after the file related to the file destination is determined according to the file destination, can be to read
State the metadata of file destination, and the metadata of the file related to the file destination, and these files that will be read
Metadata cache to the client, facilitate client to read the metadata of file.
In the present embodiment, the client was file destination to be read originally, but in the first number for reading file destination
According to while, also have read the metadata of alternative document, and by the metadata cache of these files read to the client,
Improve the efficiency that client reads the metadata of file；Meanwhile when client needs to read these files, can directly from
Read file in local caching, avoid the metadata for repeatedly reading file repeatedly, also improve the efficiency that reads file and
Performance.
It can be seen that present embodiments providing a kind of method for reading metadata, methods described is receiving client transmission
After the metadata request for reading file destination, the text related to the file destination is determined according to the file destination of the request
Part, finally reads the metadata of the file destination, and the metadata of the file related to the file destination and caches extremely
The client.By the above method, while the metadata of file destination is read, other related to file destination are read
The metadata of file, improve the efficiency for the metadata for reading file；It is small that magnanimity is read especially in distributed file system
During file, the metadata of multiple mass small documents is disposably read, can avoid reading repeatedly from distributed file system
Take the metadata of mass small documents；And by the metadata cache of these files read to client, can be effective
The efficiency for reading mass small documents is improved, and then improves the performance for reading mass small documents, reduces unnecessary resource wave
Take, improve the efficiency of system operation.
The embodiment of the invention discloses another method for reading metadata, relative to a upper embodiment, the present embodiment pair
Technical scheme has made further instruction and optimization.
Referring to Fig. 2, another method for reading metadata provided in an embodiment of the present invention, including：
S201, the request for receiving the metadata for reading file destination that client is sent；
S202, the offset determination according to file in the catalogue where the file destination of the request, and the catalogue
The file related to file destination；
It should be noted that when distributed file system receives the metadata of the reading file destination of client transmission
After request, the file related to the file destination is just determined according to the file destination of the request, is specially：Asked according to described
The offset of file determines the file related to file destination in catalogue where the file destination asked, and the catalogue.
Determine that the detailed process of the file related to file destination is as follows according to file destination：Assuming that storage file destination
There is the metadata of 10000 files under the catalogue of metadata, these file names are respectively smallfile_0,
Smallfile_1, smallfile_2, smallfile_3 ..., smallfile_9999, wherein, each file size is
256K；User is provided with the metadata according to a file, it may be determined that the metadata of other 50 files, and according to file
Offset of the title in catalogue is determined.Assuming that the entitled smallfile_0 of file destination, then according to file
During smallfile_0 metadata, the metadata of other 50 files is determined successively, that is, determines file smallfile_1,
Smallfile_2, smallfile_3, smallfile_4 ..., smallfile_50 metadata.
S203, the asynchronous metadata for reading the file destination, and first number of the file related to the file destination
According to and cache to the client.
Specifically, in the catalogue where the file destination according to the request, and the catalogue file offset
It is determined that after the file related to file destination, the metadata of file destination described in asynchronous pre-read, and with the file destination
The metadata of related file is simultaneously cached to the client.The metadata of alternative document is read using asynchronous system, not shadow
Ring after client reads the metadata of file destination and file destination is read out, the two is carried out simultaneously, both ensure that current
Normal operating, provided convenience again for the reading of subsequent file.
The detailed process for reading the metadata of file is as follows：Assuming that have under the catalogue of the metadata of storage file destination
The metadata of 10000 files, these file names are respectively smallfile_0, smallfile_1, smallfile_2,
Smallfile_3 ..., smallfile_9999, wherein, each file size is 256K；User, which is provided with, reads a file
Metadata when, the metadata of other 50 files of pre-read, and being pre-read according to offset of the file name in catalogue.It is false
If the entitled smallfile_0 of file destination, then when reading smallfile_0 metadata, other 50 are successively read
The metadata of file, that is, file smallfile_1, smallfile_2, smallfile_3, smallfile_4 ... are read,
Smallfile_50 metadata, and by file smallfile_0 to file smallfile_50 metadata cache to the visitor
Family end, in order to which client reads file.
It should be noted that the quantity of the file of the determination is consistent with the quantity of the metadata of the file pre-read.Wherein,
The number that quantity can be adjusted flexibly according to being actually needed in user, should not be limited to the present embodiment.
It can be seen that present embodiments providing a kind of method for reading metadata, methods described is receiving client transmission
After the metadata request for reading file destination, according to the catalogue where the file destination of the request, and catalogue Chinese
The offset of part determines the file related to file destination, finally the metadata of the asynchronous reading file destination, and with institute
State the metadata of the related file of file destination and cache to the client.By the above method, file destination is being read
While metadata, the metadata of the alternative document related to file destination is read, improves the effect for the metadata for reading file
Rate；During reading mass small documents especially in distributed file system, multiple mass small documents are disposably read
Metadata, it can avoid reading the metadata of mass small documents repeatedly from distributed file system；And these texts that will be read
For the metadata cache of part to client, the efficiency of mass small documents is read in raising that can be effective, and then improves reading
The performance of mass small documents, reduce the unnecessary wasting of resources, improve the efficiency of system operation.
Based on above-mentioned any embodiment, it is necessary to which explanation, the client send the metadata of reading file destination
Before request, in addition to；
The client judges whether to be cached with the metadata of the file destination；
If so, then the client reads the metadata of the file destination；
If it is not, then request to service end, the service end for the metadata that file destination is read in the client transmission is held
The step of request of the row metadata for receiving the reading file destination that client is sent.
Specifically, client is when reading a file, it is necessary first to reads the metadata of this document.But if should
Client read this document, that is, showed that the metadata of this document still has in the caching of the client, and the client
, can be with directly from the local metadata for reading this document when needing to again read off this document；Or the client is previous
In the operation for reading file, the metadata of the file of current operation is read in advance just, then client is read without across a network
The metadata of file, directly read from local.
So before the request that client sends the metadata for reading file destination, local whether cache first determined whether
There is the metadata of the file destination；If so, then the client is directly from the local metadata for reading the file destination；If
No, then request to service end, the service end for the metadata that file destination is read in the client transmission receives client
After the request of the metadata of the reading file destination of transmission, determined and the file destination phase according to the file destination of the request
The file of pass；
Read the metadata of the file destination, and the metadata of the file related to the file destination and cache extremely
The client.Thus the metadata for completing the file of current operation is read, also the metadata of pre-read alternative document, so as to visitor
Read alternative document in family end.
Based on above-mentioned any embodiment, it is necessary to which explanation, is reading first number of the file related to the file destination
According to before, in addition to：
Judge whether the client for sending the metadata for reading file destination has the metadata of pre-read alternative document
Configuration；
If so, then read the metadata of the file related to the file destination；
If nothing, the metadata of file destination is read.
Specifically, when the client for sending the metadata for reading file destination has the metadata of pre-read alternative document
During configuration, then when reading the metadata of file of current operation, read first number of the file related to the file destination
According to；When sending the configuration of metadata of the client without pre-read alternative document for the metadata for reading file destination, then
The metadata of file destination is read, and completes the reading to the file destination.
It should be noted that user flexibly can set whether configure above-mentioned pre-read alternative document according to being actually needed
The function of metadata.When the client is in busy state, because the process of operation is more, the client is currently not easy to
Open the function of the metadata of pre-read alternative document, then user can close its function, allow client first to handle other and enter
Journey；When the client is in idle condition, then user can open the function of the metadata of pre-read alternative document, with
Just client reads alternative document, improves the efficiency and performance for reading file.
A kind of device for reading metadata provided in an embodiment of the present invention is introduced below, a kind of reading described below
The device and a kind of above-described method for reading metadata for taking metadata can be with cross-referenced.
Referring to Fig. 3, a kind of device for reading metadata provided in an embodiment of the present invention, including：
Receiving module 301, the request of the metadata of the reading file destination for receiving client transmission；
Determining module 302, for determining the file related to the file destination according to the file destination of the request；
Read module 303, for reading the metadata of the file destination, and the file related to the file destination
Metadata and cache to the client.
Wherein, the determining module is specifically used for：
According in the catalogue where the file destination of the request, and the catalogue file offset determine with it is described
The related file of file destination.
Wherein, the read module is specifically used for：
The asynchronous metadata for reading the file destination, and the metadata of the file related to the file destination and delay
Deposit to the client.
A kind of system for reading metadata provided in an embodiment of the present invention is introduced below, a kind of reading described below
The system and a kind of above-described method and device for reading metadata for taking metadata can be with cross-referenced.
Referring to Fig. 4, a kind of system for reading metadata provided in an embodiment of the present invention, including：
Client 401, for sending the request for the metadata for reading file destination；
Service end 402, the request of the metadata of the reading file destination sent for receiving the client；According to described
The file destination of request determines the file related to the file destination；Read the metadata of the file destination, and with institute
State the metadata of the related file of file destination and cache to the client.
A kind of equipment for reading metadata provided in an embodiment of the present invention is introduced below, a kind of reading described below
The equipment and a kind of above-described method, apparatus for reading metadata and system for taking metadata can be with cross-referenced.
Referring to Fig. 5, a kind of equipment for reading metadata provided in an embodiment of the present invention, including：
Memory 501, the program of metadata is read for storing；
Processor 502, for perform it is described reading metadata program when realize described in above-mentioned any one reading member
The step of method of data.
A kind of computer-readable recording medium provided in an embodiment of the present invention is introduced below, one kind described below
Computer-readable recording medium can mutually be joined with a kind of above-described method, apparatus, system and equipment for reading metadata
According to.
A kind of computer-readable recording medium, the journey for reading metadata is stored with the computer-readable recording medium
Sequence, the program for reading metadata realize the method for the reading metadata described in above-mentioned any one when being executed by processor
Step.
Each embodiment is described by the way of progressive in this specification, what each embodiment stressed be and other
The difference of embodiment, between each embodiment identical similar portion mutually referring to.
The foregoing description of the disclosed embodiments, professional and technical personnel in the field are enable to realize or using the present invention.
A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope caused.
Claims (10)
- A kind of 1. method for reading metadata, it is characterised in that including：Receive the request of the metadata for the reading file destination that client is sent；The file related to the file destination is determined according to the file destination of the request；Read the metadata of the file destination, and the metadata of the file related to the file destination and cache to described Client.
- 2. the method according to claim 1 for reading metadata, it is characterised in that the target text according to the request Part determines the file related to the file destination, including：Determined and the target according to the offset of file in the catalogue where the file destination of the request, and the catalogue The related file of file.
- 3. the method according to claim 1 for reading metadata, it is characterised in that the member for reading the file destination Data, and the metadata of the file related to the file destination and cache to the client, including：The asynchronous metadata for reading the file destination, and the metadata of the file related to the file destination and caching are extremely The client.
- 4. the method for the reading metadata according to claim 1-3 any one, it is characterised in that the client is sent Before the request for reading the metadata of file destination, in addition to；The client judges whether to be cached with the metadata of the file destination；If so, then the client reads the metadata of the file destination；If it is not, then request to service end, the service end of the metadata of the client transmission reading file destination performs institute The step of stating the request for the metadata for receiving the reading file destination that client is sent.
- A kind of 5. device for reading metadata, it is characterised in that including：Receiving module, the request of the metadata of the reading file destination for receiving client transmission；Determining module, for determining the file related to the file destination according to the file destination of the request；Read module, for reading the metadata of the file destination, and first number of the file related to the file destination According to and cache to the client.
- 6. the device according to claim 5 for reading metadata, it is characterised in that the determining module is specifically used for：Determined and the target according to the offset of file in the catalogue where the file destination of the request, and the catalogue The related file of file.
- 7. the device according to claim 5 for reading metadata, it is characterised in that the read module is specifically used for：The asynchronous metadata for reading the file destination, and the metadata of the file related to the file destination and caching are extremely The client.
- A kind of 8. system for reading metadata, it is characterised in that including：Client, for sending the request for the metadata for reading file destination；Service end, the request of the metadata of the reading file destination sent for receiving the client；According to the request File destination determines the file related to the file destination；Read the metadata of the file destination, and with the target The metadata of the related file of file is simultaneously cached to the client.
- A kind of 9. equipment for reading metadata, it is characterised in that including：Memory, the program of metadata is read for storing；Processor, reading as described in claim 1-4 any one is realized during program for performing the reading metadata The step of method of metadata.
- 10. a kind of computer-readable recording medium, it is characterised in that reading member is stored with the computer-readable recording medium The program of data, the program for reading metadata are realized as described in claim 1-4 any one when being executed by processor The step of reading the method for metadata.
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| CN201711021012.2A CN107633102A (en) | 2017-10-25 | 2017-10-25 | A kind of method, apparatus, system and equipment for reading metadata |
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| CN111858766A (en) * | 2020-07-24 | 2020-10-30 | 苏州浪潮智能科技有限公司 | File copying method and device and readable storage medium |
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