CN109299111A - A kind of metadata query method, apparatus, equipment and computer readable storage medium - Google Patents
A kind of metadata query method, apparatus, equipment and computer readable storage medium Download PDFInfo
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Abstract
The invention discloses a kind of metadata query method, apparatus, equipment and computer readable storage mediums, wherein this method comprises: receiving the metadata request that requesting party sends；The metadata stored in tree manner in reading disk, and the structure based on the tree is from root node to leaf node binary chop metadata corresponding with the metadata request；The metadata corresponding with the metadata request found is returned into the requesting party.In technical solution disclosed in the present application, metadata is stored into disk in tree manner, thus metadata corresponding with metadata request is being searched, by root node being searched in a manner of binary chop to node set, this lookup mode is searched relative to traversal, inquiry velocity is very fast, and search efficiency is higher, solves the problems, such as to realize that inquiry velocity existing for the technical solution of metadata query is slower in the prior art.
Description
Technical field
The present invention relates to memory system technologies fields, more specifically to a kind of metadata query method, apparatus, set
Standby and computer readable storage medium.
Background technique
With the development of internet and Internet of Things, there is the growth of explosion type in the data volume in network, and metadata management exists
Become abnormal difficult in storage system, complex metadata query demand constantly increases.
Metadata (Metadata), also known as broker data, relaying data, for data (the data about for describing data
Data), the information of data attribute (property) is mainly described, for supporting as indicated storage location, historical data, resource
The functions such as lookup, file record.Metadata is usually stored in the disk of storage system by the prior art, and then by disk
Metadata needed for traversal queries；But scene biggish for the data volume of metadata, metadata needed for this traversal queries
Mode obviously to will lead to inquiry velocity slower.
In conclusion realizing that the technical solution of metadata query has that inquiry velocity is slower in the prior art.
Summary of the invention
The object of the present invention is to provide a kind of metadata query method, apparatus, equipment and computer readable storage medium, solutions
The slower problem of inquiry velocity existing for the technical solution of realization metadata query in the prior art of having determined.
To achieve the goals above, the invention provides the following technical scheme:
A kind of metadata query method, comprising:
Receive the metadata request that requesting party sends；
The metadata stored in tree manner in reading disk, and the structure based on the tree is from root node to leaf node two
Divide and searches metadata corresponding with the metadata request；
The metadata corresponding with the metadata request found is returned into the requesting party.
Preferably, before the metadata stored in tree manner in the reading disk, further includes:
Read the metadata stored in tree manner in pre-set caching, and the structure based on the tree is from root node
To leaf node binary chop metadata corresponding with the metadata request, if searched successfully, will find with it is described
The corresponding metadata of metadata request returns to the requesting party, otherwise, then executes and deposits in tree manner in the reading disk
The step of metadata of storage；
By after finding metadata corresponding with the metadata request in the disk, further includes:
The metadata corresponding with the metadata request found is stored into the caching.
Preferably, further includes:
If the caching is occupied full, according to the principle for the leaf node for preferentially discharging the tree to the member in the caching
Data are discharged.
Preferably, the structure based on the tree is corresponding with the metadata request from root node to leaf node binary chop
Metadata, comprising:
It determines that the metadata request corresponds to the data type of metadata, determines tree corresponding with the data type, and base
In the tree structure from root node to leaf node binary chop metadata corresponding with the metadata request.
Preferably, buffer area is preset, comprising:
According to the bigger principle of the more busy corresponding spatial cache of the affiliated storage system of the disk, setting is with the storage
It unites the caching of the corresponding space size of current busy extent.
Preferably, metadata corresponding with the metadata request is returned into the requesting party, comprising:
The metadata is shown, and the metadata is sent to the corresponding terminal of the requesting party.
Preferably, the metadata that stores in tree manner in reading disk or caching, comprising:
The metadata stored in a manner of B+ tree in reading disk or caching.
A kind of metadata query device, comprising:
Receiving module is used for: receiving the metadata request that requesting party sends；
Searching module is used for: the metadata stored in tree manner in reading disk, and the structure based on the tree is from root
Node is to leaf node binary chop metadata corresponding with the metadata request；
Return module is used for: the metadata corresponding with the metadata request found is returned to the requesting party.
A kind of metadata query equipment, comprising:
Memory, for storing computer program；
Processor realizes the step of the as above any one metadata query method when for executing the computer program
Suddenly.
A kind of computer readable storage medium is stored with computer program on the computer readable storage medium, described
The step of as above any one metadata query method is realized when computer program is executed by processor.
The present invention provides a kind of metadata query method, apparatus, equipment and computer readable storage medium, the wherein party
Method includes: the metadata request for receiving requesting party and sending；The metadata stored in tree manner in reading disk, and based on described
The structure of tree is from root node to leaf node binary chop metadata corresponding with the metadata request；To find with it is described
The corresponding metadata of metadata request returns to the requesting party.In technical solution disclosed in the present application, metadata is set
Mode is stored into disk, is thus searching corresponding with metadata request metadata, by the root node set to node with two points
The mode of lookup is searched, and this lookup mode is searched relative to traversal, and inquiry velocity is very fast, and search efficiency is higher,
It solves the problems, such as to realize that inquiry velocity existing for the technical solution of metadata query is slower in the prior art.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of flow chart of metadata query method provided in an embodiment of the present invention；
Fig. 2 is a kind of structural schematic diagram of metadata query device provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 1, can wrap it illustrates a kind of flow chart of metadata query method provided in an embodiment of the present invention
It includes:
S11: the metadata request that requesting party sends is received.
It should be noted that a kind of execution subject of metadata query method provided in an embodiment of the present invention can be correspondence
Metadata query device, and the device can be set in storage system, therefore a kind of first number provided in an embodiment of the present invention
Execution subject according to querying method can be storage system.Requesting party in the present embodiment can refer to the user of request metadata,
And requesting party's transmission metadata request can be and metadata request is directly input to metadata query device, be also possible to pass through
Terminal sends metadata request to metadata query device, and metadata request can carry the mark of the metadata of request in need
Know, for determining corresponding metadata based on the mark, or the mark of metadata corresponding data, for being based on the mark
Know the metadata for determining corresponding data, other settings can also be carried out according to actual needs certainly, in guarantor of the invention
Within the scope of shield.
S12: the metadata stored in tree manner in reading disk, and based on the structure of tree from root node to leaf node two
Divide and searches metadata corresponding with metadata request.
It should be noted that metadata can be stored in the form of a tree in disk, it is corresponding, in by disk
When searching metadata corresponding with metadata request, can be searched in a manner of binary chop by the root node set to leaf node and
The corresponding metadata of metadata request, this mode can greatly increase metadata lookup speed relative to the mode that traversal is searched
Degree.
S13: the metadata corresponding with metadata request found is returned into requesting party.
After finding metadata corresponding with metadata request, the metadata found can be returned into requesting party, such as
Fruit does not find metadata corresponding with metadata request, then can return to corresponding error message to requesting party, to be allowed to and
When know data query situation, and then realize respective operations.
In technical solution disclosed in the present application, metadata is stored into disk in tree manner, is thus being searched and member
Request of data corresponds to metadata, by root node being searched in a manner of binary chop to node set, this lookup
Mode is searched relative to traversal, and inquiry velocity is very fast, and search efficiency is higher, is solved and is realized metadata query in the prior art
The slower problem of inquiry velocity existing for technical solution.
A kind of metadata query method provided in an embodiment of the present invention, the metadata stored in reading disk in tree manner
Before, can also include:
The metadata stored in tree manner in pre-set caching is read, and based on the structure of tree from root node to leaf
Node binary chop metadata corresponding with metadata request will be found and metadata request pair if searched successfully
The metadata answered returns to requesting party, otherwise, then the step of executing the metadata stored in tree manner in reading disk；
By after finding metadata corresponding with metadata request in disk, further includes:
The metadata corresponding with metadata request found is stored into caching.
It should be noted that it is relatively slow and can shadow to not only result in inquiry velocity by query metadata in disk due to frequently
The IO performance of the affiliated storage system of disk is rung, therefore a caching can be pre-created on the upper layer of storage system in the application
(cache), the caching is for storing metadata.After metadata corresponding with metadata request is found in disk every time,
It is corresponding being put into the metadata into caching, it, can be first by delaying when searching metadata corresponding with metadata request every time
It is searched in depositing, if searching failure again by being searched in disk.To reduce by carrying out metadata query in disk
Number, and then avoid due to frequently by disk carry out metadata query bring the problem of.
It is further to note that can also periodically judge the metadata stored in caching and store corresponding member in disk
Whether data are consistent, by there are the data of one end of newest metadata to be synchronized to the other end in caching and disk when inconsistent,
It is consistent then without doing synchronization process, to ensure that in caching with the consistency that correspond to metadata in disk, and then guarantee to cache
And in disk metadata validity.
A kind of metadata query method provided in an embodiment of the present invention can also include:
If caching is occupied full, the metadata in caching is released according to the principle of the leaf node of preferential release tree
It puts.
If caching is occupied full, in order to realize the storage of new metadata, need to discharge the member stored in (deletion) caching
Data are preferentially discharged the leaf node of tree, are avoided and discharge it due to the last layer node that leaf node is tree in the application
The case where his node causes tree construction to be destroyed.In addition, it is necessary to explanation, if after leaf node is all released also
It needs to discharge metadata, then can discharge the new leaf node of present tree, until presence can store new metadata in caching
Space until.
A kind of metadata query method provided in an embodiment of the present invention is divided based on the structure of tree from root node to leaf node two
Metadata corresponding with metadata request is searched, may include:
It determines that metadata request corresponds to the data type of metadata, determines tree corresponding with the data type, and being based on should
The structure of tree is from root node to leaf node binary chop metadata corresponding with metadata request.
It should be noted that being deposited realizing that the data type for being also based on metadata when metadata storage classify
Storage, i.e., the corresponding tree of the data type of every kind metadata, and then when carrying out metadata query, first navigate to what needs were inquired
The tree of the data type of metadata, then required metadata is inquired in the tree, needed for being carried in metadata request at this time
Metadata data type, to further improve inquiry velocity in this way.Wherein, data type may include
LP, PL and HP, these types of data type is identical as the meaning for corresponding to concept in the prior art, and specifically, L refers to lba, logic
Address；P refers to pba, physical address；H refers to fingerprint value (can be regarded as indicating corresponding data information for uniqueness)；LP refers to L- " P
Mapping, PL refers to P- " mapping of L, HP refers to H- " mapping of P；Other settings can certainly be carried out according to actual needs, existed
Within protection scope of the present invention.
A kind of metadata query method provided in an embodiment of the present invention, presets buffer area, may include:
According to the bigger principle of the more busy corresponding spatial cache of the affiliated storage system of disk, setting and storage system are current
The caching of the corresponding space size of busy extent.
It demonstrates the need for realizing that the speed of metadata query is faster since storage system is busier, be got over according to storage system
Caching is arranged in the bigger principle of busy corresponding spatial cache, enables to caching that can store more metadata, corresponding by delaying
The metadata inquired in depositing is more, and then advantageously reduces the number by searching metadata in disk, improves metadata and looks into
The speed of inquiry.It should be noted that the normal operation in order to guarantee storage system, it can not be by buffer setting at infinity, therefore
Need to be arranged the corresponding capacity-threshold of caching, namely the space size maximum of caching can be set to the capacity-threshold.In addition, can
To preset the corresponding relationship of storage system busy extent and spatial cache size, and then determines and deposit based on the corresponding relationship
The corresponding spatial cache size of the current busy extent of storage system, and corresponding caching is set, naturally it is also possible to according to practical need
Other settings are carried out, it is within the scope of the present invention.
A kind of metadata query method provided in an embodiment of the present invention returns to metadata corresponding with metadata request
Requesting party may include:
Metadata is shown, and transmits metadata to the corresponding terminal of requesting party.
Requesting party can directly know metadata by the information of display as a result, and be not located at display device in requesting party
When preceding, metadata can also be known by terminal, further ensure timely acquisition of the requesting party for corresponding information.It can also be with
Other settings are carried out according to actual needs, such as are sent to the mailbox of requesting party by way of mail, in guarantor of the invention
Within the scope of shield.
It is stored in tree manner in a kind of metadata query method provided in an embodiment of the present invention, reading disk or caching
Metadata may include:
The metadata stored in a manner of B+ tree in reading disk or caching.
Tree in the present embodiment can be B+ tree, specifically, B+ tree be for disk or other be directly accessed ancillary equipment
And a kind of balance search tree designed, in B+ tree, all record nodes are all that the size order of key value is stored in same layer
Leaf node in, each leaf node pointer is attached；Because the storage of data be according to certain data structure sequential storage, this
Just lay the foundation for subsequent quick search.
The embodiment of the invention also provides a kind of metadata query devices, as shown in Fig. 2, may include:
Receiving module 11, is used for: receiving the metadata request that requesting party sends；
First searching module 12, is used for: the metadata stored in tree manner in reading disk, and based on the structure of tree from
Root node is to leaf node binary chop metadata corresponding with metadata request；
Return module 13, is used for: the metadata corresponding with metadata request found is returned to requesting party.
A kind of metadata query device provided in an embodiment of the present invention can also include:
Second searching module, is used for: before the metadata stored in tree manner in reading disk, reading pre-set
The metadata stored in tree manner in caching, and asked from root node to leaf node binary chop with metadata based on the structure of tree
Corresponding metadata is sought, if searched successfully, the metadata corresponding with metadata request found is returned into requesting party,
Otherwise, then the step of executing the metadata stored in tree manner in reading disk；
Cache module is used for: after find metadata corresponding with metadata request in disk, will find with
The corresponding metadata of metadata request is stored into caching.
A kind of metadata query device provided in an embodiment of the present invention can also include:
Release module is used for: if caching is occupied full, the principle for the leaf node set according to preferential release is in caching
Metadata is discharged.
A kind of metadata query device provided in an embodiment of the present invention, the first searching module and the second searching module can be with
Include:
Searching unit is used for: determining that metadata request corresponds to the data type of metadata, determination is corresponding with the data type
Tree, and based on the structure of the tree from root node to leaf node binary chop metadata corresponding with metadata request.
A kind of metadata query device provided in an embodiment of the present invention can also include:
Setup module is used for: according to the bigger principle of the more busy corresponding spatial cache of the affiliated storage system of disk, setting with
The caching of the corresponding space size of the current busy extent of storage system.
A kind of metadata query device provided in an embodiment of the present invention, return module may include:
Return unit is used for: being shown to metadata, and is transmitted metadata to the corresponding terminal of requesting party.
A kind of metadata query device provided in an embodiment of the present invention, the first searching module and the second searching module can be with
Include:
Reading unit is used for: the metadata stored in a manner of B+ tree in reading disk or caching.
The embodiment of the invention also provides a kind of metadata query equipment, may include:
Memory, for storing computer program；
Processor, when for executing computer program realize as above any one of metadata query method the step of.
The embodiment of the invention also provides a kind of computer readable storage medium, it is stored on computer readable storage medium
Computer program, when computer program is executed by processor realize as above any one of metadata query method the step of.
It should be noted that a kind of metadata query device provided in an embodiment of the present invention, equipment and computer-readable depositing
The explanation of relevant portion refers to corresponding part in a kind of metadata query method provided in an embodiment of the present invention in storage media
It is described in detail, details are not described herein.In addition in above-mentioned technical proposal provided in an embodiment of the present invention with correspond to skill in the prior art
The consistent part of art scheme realization principle is simultaneously unspecified, in order to avoid excessively repeat.
The foregoing description of the disclosed embodiments can be realized those skilled in the art or using the present invention.To this
A variety of modifications of a little embodiments will be apparent for a person skilled in the art, and the general principles defined herein can
Without departing from the spirit or scope of the present invention, to realize in other embodiments.Therefore, the present invention will not be limited
It is formed on the embodiments shown herein, and is to fit to consistent with the principles and novel features disclosed in this article widest
Range.
Claims (10)
1. a kind of metadata query method characterized by comprising
Receive the metadata request that requesting party sends；
The metadata stored in tree manner in reading disk, and the structure based on the tree is divided from root node to leaf node two and is looked into
Look for metadata corresponding with the metadata request；
The metadata corresponding with the metadata request found is returned into the requesting party.
2. the method according to claim 1, wherein the metadata stored in tree manner in the reading disk
Before, further includes:
The metadata stored in tree manner in pre-set caching is read, and the structure based on the tree is from root node to leaf
Node binary chop metadata corresponding with the metadata request will be found and first number if searched successfully
According to requesting corresponding metadata to return to the requesting party, otherwise, then executes and stored in tree manner in the reading disk
The step of metadata；
By after finding metadata corresponding with the metadata request in the disk, further includes:
The metadata corresponding with the metadata request found is stored into the caching.
3. according to the method described in claim 2, it is characterized by further comprising:
If the caching is occupied full, according to the principle for the leaf node for preferentially discharging the tree to the metadata in the caching
It is discharged.
4. according to the method described in claim 3, it is characterized in that, the structure based on the tree is divided from root node to leaf node two
Search metadata corresponding with the metadata request, comprising:
It determines that the metadata request corresponds to the data type of metadata, determines tree corresponding with the data type, and being based on should
The structure of tree is from root node to leaf node binary chop metadata corresponding with the metadata request.
5. according to the method described in claim 4, it is characterized in that, presetting buffer area, comprising:
According to the bigger principle of the more busy corresponding spatial cache of the affiliated storage system of the disk, setting is worked as with the storage system
The caching of the corresponding space size of preceding busy extent.
6. according to the method described in claim 5, it is characterized in that, metadata corresponding with the metadata request is returned to
The requesting party, comprising:
The metadata is shown, and the metadata is sent to the corresponding terminal of the requesting party.
7. according to the method described in claim 6, it is characterized in that, the first number stored in tree manner in reading disk or caching
According to, comprising:
The metadata stored in a manner of B+ tree in reading disk or caching.
8. a kind of metadata query device characterized by comprising
Receiving module is used for: receiving the metadata request that requesting party sends；
Searching module is used for: the metadata stored in tree manner in reading disk, and the structure based on the tree is from root node
To leaf node binary chop metadata corresponding with the metadata request；
Return module is used for: the metadata corresponding with the metadata request found is returned to the requesting party.
9. a kind of metadata query equipment characterized by comprising
Memory, for storing computer program；
Processor realizes the metadata query method as described in any one of claim 1 to 7 when for executing the computer program
The step of.
10. a kind of computer readable storage medium, which is characterized in that be stored with computer on the computer readable storage medium
Program, realizing the metadata query method as described in any one of claim 1 to 7 when the computer program is executed by processor
Step.
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| CN110909211A (en) * | 2019-10-12 | 2020-03-24 | 苏州浪潮智能科技有限公司 | Metadata verification method and device based on metadata B + tree |
| CN111104435A (en) * | 2019-11-29 | 2020-05-05 | 北京浪潮数据技术有限公司 | Metadata organization method, device and equipment and computer readable storage medium |
| CN112486407A (en) * | 2020-10-29 | 2021-03-12 | 苏州浪潮智能科技有限公司 | Method and device for querying reconstructed metadata of Redundant Array of Independent Disks (RAID) |
| CN112800067A (en) * | 2021-02-20 | 2021-05-14 | 成都佰维存储科技有限公司 | Range query method and device, computer readable storage medium and electronic equipment |
| CN115599704A (en) * | 2022-11-30 | 2023-01-13 | 湖南国科亿存信息科技有限公司（Cn） | File system metadata separate storage method and device and storage medium |
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Application publication date: 20190201 |