CN109521962A - 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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- CN109521962A CN109521962A CN201811353666.XA CN201811353666A CN109521962A CN 109521962 A CN109521962 A CN 109521962A CN 201811353666 A CN201811353666 A CN 201811353666A CN 109521962 A CN109521962 A CN 109521962A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0602—Interfaces specially adapted for storage systems specifically adapted to achieve a particular effect
- G06F3/061—Improving I/O performance
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
- G06F3/0638—Organizing or formatting or addressing of data
- G06F3/0643—Management of files
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0668—Interfaces specially adapted for storage systems adopting a particular infrastructure
- G06F3/0671—In-line storage system
- G06F3/0673—Single storage device
- G06F3/0674—Disk device
- G06F3/0676—Magnetic disk device
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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；By searching metadata corresponding with the metadata request in the caching that is pre-created, if searched successfully, the metadata found is then returned into the requesting party, otherwise, then by searching metadata corresponding with the metadata request in disk, the metadata found is returned into the requesting party, and the metadata found is stored into the caching.It can be reduced in this way by the number of query metadata in disk, and then it avoids the problem that a certain degree relatively slow and influence storage system IO performance namely technical solution disclosed in the present application can speed up inquiry and guarantee the IO performance of storage system to a certain extent as frequently searching in disk inquiry velocity caused by metadata.
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 inquiry.But inventors have found that it will appear inquiry in frequent progress metadata query through the above way
Speed is relatively slow, influences the problem of storage system IO performance.
In conclusion the prior art realizes the technical solution of metadata query, that there are inquiry velocities is relatively slow, influences storage system
The problem of IO performance of uniting.
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, energy
It enough solves the prior art and realizes that inquiry velocity existing for the technical solution of metadata query is relatively slow, influences storage system IO performance
Problem.
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；
By searching metadata corresponding with the metadata request in the caching that is pre-created, if searched successfully, general
The metadata found returns to the requesting party, otherwise, then by searching first number corresponding with the metadata request in disk
According to the metadata found being returned to the requesting party, and the metadata found is stored into the caching.
Preferably, further includes:
According in the caching the longer liveness of storage time it is lower, in the caching it is more how active by lookup number
It spends higher principle in real time or timing calculates the liveness of each metadata in the caching, and liveness is lower than liveness threshold value
Metadata by being discharged in the caching.
Preferably, the liveness of each metadata in the caching is calculated, comprising:
The liveness of each metadata in the caching is calculated according to the following formula:
Wherein, A is the liveness of any piece of metadata in the caching, frIt is looked into the caching for any piece of metadata
The number looked for, t are current time, tcAt the time of storage for any piece of metadata into the caching.
Preferably, metadata corresponding with the metadata request is searched in the caching or the disk, comprising:
Read the metadata that stores in tree manner in the caching or the disk, and the structure based on the tree is from root
Node is to leaf node binary chop metadata corresponding with the metadata request.
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, further includes:
If searching metadata failure corresponding with the metadata request in the disk, error message is returned to extremely
The requesting party.
Preferably, metadata corresponding with the metadata request or the error message are returned into the request
Side, comprising:
To the metadata, perhaps the error message shows and sends out the metadata or the error message
Send terminal corresponding to the requesting party.
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: by searching metadata corresponding with the metadata request in the caching that is pre-created, if
It searches successfully, then the metadata found is returned into the requesting party, otherwise, then asked by being searched in disk with the metadata
Corresponding metadata is sought, the metadata found is returned into the requesting party, and the metadata found is stored to described
In caching.
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；It is corresponding with the metadata request by being searched in the caching that is pre-created
Metadata the metadata found is returned into the requesting party if searched successfully, otherwise, then by being searched in disk
The metadata found is returned to the requesting party, and the member that will be found by metadata corresponding with the metadata request
Data are stored into the caching.The caching for realizing metadata storage is pre-created in the present invention, to send out in respond request side
When the metadata request sent, metadata corresponding with metadata request is first searched in the buffer, searches and is successfully then directly returned to ask
The metadata found otherwise then by searching metadata corresponding with metadata request in disk, and is returned to requesting party by the side of asking
And it stores to caching.It in this way can reduce by the number of query metadata in disk, and then avoid to a certain degree
The problem of as frequently searching relatively slow inquiry velocity caused by metadata and influence storage system IO performance in disk, Ye Jiben
Apply for that disclosed technical solution can speed up inquiry and guarantee the IO performance of storage system to a certain extent.
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: by searching metadata corresponding with metadata request in the caching that is pre-created, if searched successfully, general
The metadata found returns to requesting party, otherwise, then by searching metadata corresponding with metadata request in disk, will search
To metadata return to requesting party, and the metadata found is stored into caching.
A caching (cache) can be pre-created on the upper layer of storage system, the caching is for storing metadata.Every time
After finding metadata corresponding with metadata request in disk, the metadata can be put into caching, as a result, every
It, can be first by being searched in caching, if searching failure again by disk when secondary lookup metadata corresponding with metadata request
It is searched.To reduce by disk carry out metadata query number, and then avoid due to frequently by disk into
The problem of row metadata query is brought.
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.
The caching for realizing metadata storage is pre-created in the present invention, thus the metadata request sent in respond request side
When, metadata corresponding with metadata request is first searched in the buffer, is searched and is successfully then directly returned to requesting party, otherwise then by magnetic
Metadata corresponding with metadata request is searched in disk, and the metadata found is returned into requesting party and is stored to caching.It is logical
To cross this mode can be reduced by the number of query metadata in disk, so avoid to a certain degree due in disk frequently
The problem of searching relatively slow inquiry velocity caused by metadata and influence storage system IO performance namely technical side disclosed in the present application
Case can speed up inquiry and guarantee the IO performance of storage system to a certain extent.
A kind of metadata query method provided in an embodiment of the present invention can also include:
It is lower according to the longer liveness of storage time in the buffer, higher by the more liveness of lookup number in the buffer
Principle is in real time or timing calculates the liveness of each metadata in caching, and liveness is lower than the metadata of liveness threshold value by delaying
Deposit middle release.
It should be noted that metadata life cycle early period can by frequent visit (including read and modify), with
The passage of time, the access frequency of these metadata can be greatly reduced；Wherein, life cycle is time in the buffer, letter
For list, a possibility that the time that metadata stores in the buffer the long accessed, is lower, and the time stored in the buffer is shorter
A possibility that accessed, is higher.Also, the number that metadata is accessed in the buffer is more, more illustrates that it is relatively high for temperature
Data, a possibility that being accessed, are higher, and accessed number is fewer in the buffer, more illustrate its data relatively low for temperature,
A possibility that accessed, is lower.Above it is that inventor is had found based on actual monitoring, therefore according to caching in the present embodiment
The more liveness of number that the middle longer liveness of storage time is lower, is searched (be as accessed by searching) in the buffer are higher
Principle determine caching in each metadata liveness, and then determine liveness lower than liveness threshold value metadata be it is non-live
Jump metadata, i.e., the accessed lower metadata of possibility, by inactive metadata by release in caching (i.e. by deleting in caching
Except), enable to caching in have enough spaces for store enliven metadata (liveness not less than liveness threshold value, be interviewed
Ask possibility higher metadata), while guaranteeing that in caching be to enliven metadata, so that cache hit rate increases, further
Improve metadata query speed.
It is further to note that if the space cached after the release of inactive metadata is still occupied full,
Need to store metadata to when caching, release enlivens the minimum multiple metadata of liveness in metadata, to obtain to store
The spatial cache of new metadata, so that realizing new metadata while a possibility that each metadata is accessed in caching maximum
Smooth caching.
A kind of metadata query method provided in an embodiment of the present invention calculates the liveness of each metadata in caching, can be with
Include:
The liveness of each metadata in caching is calculated according to the following formula:
Wherein, A is the liveness of any piece of metadata in caching, frTime searched in the buffer for any piece of metadata
Number, t is current time, tcAt the time of storage for any piece of metadata into caching.
It should be noted that can be searched lower according to the longer liveness of storage time in the buffer, in the buffer secondary
The higher principle of the more liveness of number, preset in the buffer storage time, in the buffer by lookup number and liveness it
Between corresponding relationship, and then determine any piece of metadata in the buffer storage time, then may be used after lookup number in the buffer
To determine the liveness of any piece of metadata based on above-mentioned corresponding relationship；And realized in the present embodiment using above-mentioned formula, not only
Without pre-defining above-mentioned corresponding relationship, and actual monitoring proves, the liveness obtained using above-mentioned company can effectively be embodied
A possibility that metadata is accessed size is corresponded to out, namely realizes that simple, result is accurate.Certainly can also according to actual needs into
Other settings of row, it is within the scope of the present invention.
A kind of metadata query method provided in an embodiment of the present invention is searched and metadata request pair in caching or disk
The metadata answered may include:
The metadata stored in tree manner in caching or disk is read, and based on the structure of tree from root node to leaf node
Binary chop metadata corresponding with metadata request.
Metadata can be stored in the form of a tree in caching and disk, thus by the root node set to leaf node
Binary chop data corresponding with metadata request further improve metadata query speed relative to traversal queries.Separately
Outside, the tree in the present embodiment can be B+ tree, specifically, B+ tree be for disk or other be directly accessed ancillary equipment and design
A kind of balance search tree, in B+ tree, all record nodes are all that the size order of key value is stored in the leaf segment of same layer
In point, each leaf node pointer is attached；Because the storage of data is according to certain data structure sequential storage, after this is just
Continuous quick search lays the foundation.
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 realizing the data type progress classification storage for being also based on metadata when metadata storage,
The corresponding tree of the data type of i.e. every kind metadata, and then when carrying out metadata query, first navigate to the member for needing to inquire
The tree of the data type of data, then required metadata is inquired in the tree, it can be carried in metadata request at this time required
The data type of metadata, 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 can also include:
If searching metadata failure corresponding with metadata request in disk, error message is returned to requesting party.
It should be noted that corresponding error message can be returned into requesting party after searching metadata failure, so as to
In requesting party's timely learning metadata query situation, and then realize respective operations.It specifically, will be corresponding with metadata request
Metadata or error message return to requesting party, may include:
To metadata, perhaps error message is shown and that metadata or error message are sent to requesting party is corresponding
Terminal.
Requesting party can directly know metadata or error message by the information of display as a result, and in the non-position of requesting party
When before display device, metadata or error message can also be known by terminal, further ensures requesting party for corresponding
The timely acquisition of information.Other settings can also be carried out according to actual needs, as being sent to requesting party by way of mail
Mailbox etc., it is within the scope of the present invention.
The embodiment of the invention also discloses 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；
Searching module 12, is used for: by searching metadata corresponding with metadata request in the caching that is pre-created, if looked into
Success is looked for, then the metadata found is returned into requesting party, otherwise, then by searching member corresponding with metadata request in disk
The metadata found is returned to requesting party, and the metadata found is stored into caching by data.
A kind of metadata query device disclosed by the embodiments of the present invention can also include:
Release module is used for: it is lower according to the longer liveness of storage time in the buffer, in the buffer by lookup number more
The higher principle of more liveness is in real time or timing calculates the liveness of each metadata in caching, and liveness is lower than liveness threshold
The metadata of value in caching by discharging.
A kind of metadata query device disclosed by the embodiments of the present invention, release module may include:
Computing unit is used for: the liveness of each metadata in caching is calculated according to the following formula:
Wherein, A is the liveness of any piece of metadata in caching, frTime searched in the buffer for any piece of metadata
Number, t is current time, tcAt the time of storage for any piece of metadata into caching.
A kind of metadata query device disclosed by the embodiments of the present invention, searching module may include:
Searching unit is used for: read the metadata that stores in tree manner in caching or disk, and based on the structure of tree from
Root node is to leaf node binary chop metadata corresponding with metadata request.
A kind of metadata query device disclosed by the embodiments of the present invention, searching unit may include:
Subelement is searched, is used for: determining that metadata request corresponds to the data type of metadata, the determining and data type pair
The tree answered, 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 disclosed by the embodiments of the present invention can also include:
Report an error module, is used for: if searching metadata failure corresponding with metadata request in disk, returning to mistake
Information is to requesting party.
A kind of metadata query device disclosed by the embodiments of the present invention, searching module and the module that reports an error may each comprise:
Return unit is used for: to metadata, perhaps error message shows and sends metadata or error message
To the corresponding terminal of requesting party.
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 mediums, which is characterized in that computer-readable storage
It is stored with computer program on medium, as above any one metadata query side may be implemented when computer program is executed by processor
The step of method.
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；
By searching metadata corresponding with the metadata request in the caching that is pre-created, if searched successfully, by lookup
To metadata return to the requesting party, otherwise, then by searching corresponding with metadata request metadata, general in disk
The metadata found returns to the requesting party, and the metadata found is stored into the caching.
2. the method according to claim 1, wherein further include:
According in the caching the longer liveness of storage time it is lower, in the caching by the more liveness of lookup number more
High principle calculates the liveness of each metadata in the caching in real time or periodically, and liveness is lower than to the member of liveness threshold value
Data in the caching by discharging.
3. according to the method described in claim 2, it is characterized in that, calculating the liveness of each metadata in the caching, comprising:
The liveness of each metadata in the caching is calculated according to the following formula:
Wherein, A is the liveness of any piece of metadata in the caching, frIt is searched in the caching for any piece of metadata
Number, t are current time, tcAt the time of storage for any piece of metadata into the caching.
4. according to the method described in claim 3, it is characterized in that, being searched in the caching or the disk and first number
According to the corresponding metadata of request, comprising:
Read the metadata that stores in tree manner in the caching or the disk, and the structure based on the 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, 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.
6. according to the method described in claim 5, it is characterized by further comprising:
Fail if searching corresponding with metadata request metadata in the disk, returns to error message to described
Requesting party.
7. according to the method described in claim 6, it is characterized in that, will metadata corresponding with the metadata request or institute
It states error message and returns to the requesting party, comprising:
To the metadata, perhaps the error message shows and is sent to the metadata or the error message
The corresponding terminal of the requesting party.
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: by searching metadata corresponding with the metadata request in the caching that is pre-created, if lookup
Success, then return to the requesting party for the metadata found, otherwise, then by searching and the metadata request pair in disk
The metadata found is returned to the requesting party, and the metadata found is stored to the caching by the metadata answered
In.
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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| CN110008030A (en) * | 2019-04-16 | 2019-07-12 | 苏州浪潮智能科技有限公司 | A kind of method of metadata access, system and equipment |
| CN110008030B (en) * | 2019-04-16 | 2020-06-19 | 苏州浪潮智能科技有限公司 | Method, system and equipment for accessing metadata |
| WO2021008425A1 (en) * | 2019-07-12 | 2021-01-21 | 华为技术有限公司 | System startup method and related device |
| US11868631B2 (en) | 2019-07-12 | 2024-01-09 | Huawei Technologies Co., Ltd. | System startup method and related device |
| CN110532201A (en) * | 2019-08-23 | 2019-12-03 | 北京浪潮数据技术有限公司 | A kind of metadata processing method and device |
| CN110532201B (en) * | 2019-08-23 | 2021-08-31 | 北京浪潮数据技术有限公司 | Metadata processing method and device |
| CN113127479A (en) * | 2019-12-31 | 2021-07-16 | 奇安信科技集团股份有限公司 | Method and device for loading Elasticissearch index, computer equipment and storage medium |
| CN111752751A (en) * | 2020-05-27 | 2020-10-09 | 苏州浪潮智能科技有限公司 | Backup tape reorganization system and method based on strategy |
| CN111752751B (en) * | 2020-05-27 | 2022-12-27 | 苏州浪潮智能科技有限公司 | Backup tape reorganization system and method based on strategy |
| WO2024001827A1 (en) * | 2022-06-28 | 2024-01-04 | 华为技术有限公司 | Data access method, apparatus, and system |
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