CN107463577A - A kind of data-storage system and data search method - Google Patents
A kind of data-storage system and data search method Download PDFInfo
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- CN107463577A CN107463577A CN201610393783.3A CN201610393783A CN107463577A CN 107463577 A CN107463577 A CN 107463577A CN 201610393783 A CN201610393783 A CN 201610393783A CN 107463577 A CN107463577 A CN 107463577A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/24—Querying
- G06F16/245—Query processing
- G06F16/2458—Special types of queries, e.g. statistical queries, fuzzy queries or distributed queries
- G06F16/2471—Distributed queries
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/10—File systems; File servers
- G06F16/14—Details of searching files based on file metadata
- G06F16/148—File search processing
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/10—File systems; File servers
- G06F16/18—File system types
- G06F16/182—Distributed file systems
Abstract
The embodiment of the invention discloses a kind of data-storage system and data search method, for distributed storage file metadata.Present invention method includes：Metadata main frame, for storage file metadata, return to the file destination metadata；Main frame is inquired about, the metadata lookup for receiving to the file destination metadata is asked, it is determined that being stored with the target metadata main frame of the file destination metadata, the file destination metadata is obtained from the target metadata main frame.When increasing with the scale of system, the main frame that can be used for the file metadata of storage is also more and more, you can and it is more and more to receive the main frame of the inquiry to file metadata, therefore will not be limited by the service ability of metadata main frame when system extends.
Description
Technical field
The present invention relates to electricity field, more particularly to a kind of data-storage system and data search method.
Background technology
Distributed storage technology is the key technology of big data system, and this memory technology can be more masters
Being locally stored for machine shares out, using the storage system that the multiple host is unified as one.Such
In storage system, what any main frame can be transparent accesses any main frame of this storage system.
Current most popular distributed storage technology is distributed file system HDFS.In HDFS
In, the main frame of actual storage data file is referred to as Data Node, and HDFS system includes more
Data Node.In system any Data Node can according to the Generating Data File file metadata,
Then file metadata can be stored onto another specific main frame, the main frame of the storage file metadata
It is referred to as Name Node.In general, in HDFS system, Name Node have two,
Same content is stored respectively, it is active and standby each other.When Data Node1 application programs need to read a data
During file, first Name Node are asked to return to the file metadata to the data file, then according to Name
Node return this document metadata finds the main frame Data Node2 of data actual storage, finally from this
Data Node2 kinds obtain the data file.
Name Node are as a main frame, and its processing to data is always limited, therefore service ability
It is limited.But in actual applications, large-scale system is generally required, the Data Node in the system
Quantity it is quite big, and the quantity of file metadata for needing to store is also sizable.Have simultaneously big
The main frame of amount needs to scan for the file metadata of storage, because Name Node service ability is past
Toward the so substantial amounts of search of reply is insufficient to, easily cause system crash so that the scale of system be difficult to after
It is continuous to expand.
The content of the invention
The embodiments of the invention provide a kind of data-storage system and data search method, for distribution
Storage file metadata.
In view of this, the application first aspect provides a kind of data-storage system, and the system includes：Member
Data host, for storage file metadata, return to file destination metadata；Main frame is inquired about, for connecing
Receive and the metadata lookup of the file destination metadata is asked, it is determined that being stored with the file destination metadata
Target metadata main frame, the file destination metadata is obtained from the target metadata main frame.
The data-storage system is made up of multiple host, the quantity size of main frame, can also continue to extend.
The main frame can be used as metadata main frame, for storage file metadata, and return to file metadata.
The main frame is also used as inquiring about main frame, for being asked when reception to the metadata lookup of file destination metadata
When asking, determine to be stored with the metadata main frame of this document metadata according to metadata lookup request, and from
This document metadata is obtained in the metadata main frame.
It should be noted that the inquiry main frame and the metadata main frame may be same main frame, i.e., ought look into
When asking metadata lookup request of the main frame reception to file destination metadata, asked according to the metadata lookup
It is determined that when the metadata main frame for being stored with this document metadata is the machine, this document member can be obtained from the machine
Data.
Because the All hosts in system can serve as the metadata main frame of storage file metadata, without
It is that All Files metadata is all centrally stored on a certain specific main frame, therefore when with system
When scale is increasing, the main frame that can be used for the file metadata of storage is also more and more, you can to connect
Main frame by the inquiry to file metadata is more and more, therefore will not be by metadata master during system extension
The limitation of the service ability of machine.
With reference to the application's in a first aspect, the first embodiment of the first aspect of the application, the system
Including：Routing table main frame, for storing routing table entry, return to the target routing lists entry, the target
Routing table entry is used to indicate that the file destination metadata is stored in the target metadata main frame.
With reference to the first embodiment of the first aspect of the application, second of the first aspect of the application
Embodiment, the inquiry main frame include determining unit, and the determining unit is stored with target text for determination
The target metadata main frame of part metadata；The determining unit includes：First determination subelement, for basis
Metadata lookup request determines to be stored with the target routing lists main frame of target routing lists entry；It is single to obtain son
Member, for obtaining the target routing lists in the target routing lists main frame that is determined from first determination subelement
Entry；Second determination subelement, for the target routing lists entry obtained according to the acquisition subelement,
It is determined that it is stored with the target metadata main frame of the file destination metadata.
Routing table entry is used to indicate that the file destination metadata is stored in the target metadata main frame.
Optionally, inquire about main frame possibly directly can not ask determination to be stored with the target by metadata lookup
The target metadata main frame of file metadata, in this case, the main frame in the data-storage system is also
Routing table main frame can be used as, the routing table main frame is used to store routing table entry, and the routing table entry is used
The target metadata main frame of the file destination metadata is stored with instruction.
Specifically, the corresponding relation of file metadata and the metadata main frame of storage this document metadata can be with
It is stored as a kind of routing table formed in the form of file directory, in the routing table each
Routing table entry can indicate a file metadata and store the metadata main frame of this document metadata
Corresponding relation.In embodiments of the present invention, the routing table is divided into multiple routing table entrys, deposits respectively
Storage is in each main frame of system, in another angle, it may also be said to the routing table bar of the storage in system
Mesh forms a complete routing table formed in the form of file directory.
Storing the target routing lists main frame of target routing lists entry can be drawn using consistent hash algorithm, then
Either inquiring about main frame needs to inquire about the target routing lists main frame for being used for obtaining target routing lists entry, or
Person is metadata storage host it needs to be determined that target routing lists master for storing the target routing lists entry
Machine, the same main frame that can be determined.
Storing the target routing lists main frame of target routing lists entry can be drawn using consistent hash algorithm, then
Either inquiring about main frame needs to inquire about the target routing lists main frame for being used for obtaining target routing lists entry, or
Person is metadata storage host it needs to be determined that target routing lists master for storing the target routing lists entry
Machine, the same main frame that can be determined.In addition, in general, may be used also by hash algorithm
Make it that each routing table entry is that near random is equably stored on multiple host, therefore each road
There is certain stationarity by the storage location of table clause.
With reference to second of embodiment of the first aspect of the application, the first aspect of the application the third
Embodiment, the inquiry main frame also include：Memory cell, for when the inquiry main frame is from the target element number
After the file destination metadata is obtained in main frame, the file destination metadata is stored.
With reference to the third embodiment of the first aspect of the application, the 4th kind of the first aspect of the application
Embodiment, the target routing lists main frame also include：Updating block, for when the return target routing lists
After entry, the target routing lists entry is updated, the target routing lists entry after being updated, the renewal
Target routing lists entry afterwards is used to indicate that the file destination metadata is stored in the inquiry main frame.
The 4th kind of the third embodiment, the first aspect of the application with reference to the first aspect of the application
Embodiment, the 5th kind of embodiment of the first aspect of the application, the target metadata main frame also include：
Unit is deleted, after returning to the file destination metadata, deletes the file destination metadata.
The first embodiment, the application of the first aspect of first aspect, the application with reference to the application
Second of embodiment of first aspect, the third embodiment of the first aspect of the application, this Shen
4th kind of embodiment of first aspect please, the 6th kind of embodiment of the first aspect of the application should
Inquiry main frame also includes：Search unit, for when the inquiry main frame receive the metadata lookup request after,
In local search this document metadata, if it is true to trigger the lookup main frame less than this document metadata for search
Surely the step of being stored with the target metadata main frame of the file destination metadata.
The application second aspect provides a kind of data search method, for being somebody's turn to do in such as the application second aspect
Any one system, this method include：Inquiring about main frame reception please to the metadata lookup of file destination metadata
Ask；The inquiry main frame determines to be stored with the target metadata main frame of the file destination metadata；Inquiry master
Machine obtains the file destination metadata from the target metadata main frame.
When inquiring about metadata lookup request of the main frame reception to file destination metadata, user can be passed through
The search request to some data or file is needed in terminal input, according to the lookup to data or file
Request determines file destination metadata, so as to generate the metadata lookup request to file destination metadata.
If the target routing lists main frame and the inquiry main frame are not same main frames, the inquiry main frame can be to mesh
Mark the acquisition that routing table main frame is sent to the target routing lists entry to ask, the target routing lists main frame receives
This to target routing lists entry acquisition request when, return to the catalogue routing table entry.
If the target metadata main frame and the inquiry main frame are not same main frames, the inquiry main frame can be with
The acquisition sent to target metadata main frame to the file destination metadata is asked, the target metadata main frame
When receiving the acquisition request to file destination metadata, the catalogue routing table entry is returned.When inquiry is led
, optionally, can be by target text after machine obtains the file destination metadata from the target metadata main frame
Part metadata is moved to local, and deletes the file destination metadata in target metadata main frame, and
Update the target routing lists entry in target routing lists main frame.
Because the All hosts in system can serve as the metadata main frame of storage file metadata, without
It is that All Files metadata is all centrally stored on a certain specific main frame, therefore when with system
When scale is increasing, the main frame that can be used for the file metadata of storage is also more and more, you can to connect
Main frame by the inquiry to file metadata is more and more, therefore will not be by metadata master during system extension
The limitation of the service ability of machine.
With reference to the second aspect of the application, the first embodiment of the second aspect of the application, this method
Including：The inquiry main frame determines to be stored with the target of target routing lists entry according to metadata lookup request
Routing table main frame；The inquiry main frame obtains the target routing lists entry from the target routing lists main frame；Should
Inquiry main frame determines to be stored with the target element number of the file destination metadata according to the target routing lists entry
According to main frame.
With reference to the second aspect of the application, second of embodiment of the second aspect of the application, this method
Also include：The inquiry main frame stores the file destination metadata.
The first embodiment, the application of the second aspect of second aspect, the application with reference to the application
Second aspect second of embodiment, the third embodiment of the second aspect of the application, the party
Method also includes：The inquiry main frame is from the local search file destination metadata；If search the file destination
Metadata, then return to the file destination metadata；If search triggers less than the file destination metadata
The step of inquiry main frame determines to be stored with the target metadata main frame of the file destination metadata.
As can be seen from the above technical solutions, the embodiment of the present invention has advantages below：
Because the All hosts in system can serve as the metadata main frame of storage file metadata, without
It is that All Files metadata is all centrally stored on a certain specific main frame, therefore when with system
When scale is increasing, the main frame that can be used for the file metadata of storage is also more and more, you can to connect
Main frame by the inquiry to file metadata is more and more, therefore will not be by metadata master during system extension
The limitation of the service ability of machine.
Brief description of the drawings
Fig. 1 is the configuration diagram of data-storage system in the embodiment of the present application；
Fig. 2 is one embodiment schematic diagram that main frame is inquired about in the embodiment of the present application；
Fig. 3 is one embodiment schematic diagram of metadata main frame in the embodiment of the present application；
Fig. 4 is one embodiment schematic diagram of routing table main frame in the embodiment of the present application；
Fig. 5 is one embodiment schematic diagram of data search method in the embodiment of the present application；
Fig. 6 is another embodiment schematic diagram of data search method in the embodiment of the present application；
Fig. 7 is another embodiment schematic diagram of data search method in the embodiment of the present application；
Fig. 8 is one embodiment schematic diagram of the main frame in system in the embodiment of the present application；
Fig. 9 is another embodiment schematic diagram of the main frame in system in the embodiment of the present application.
Embodiment
The embodiments of the invention provide a kind of data-storage system and data search method, for distribution
Storage file metadata.
In order that those skilled in the art more fully understand scheme of the embodiment of the present invention, below in conjunction with this
Accompanying drawing in inventive embodiments, the technical scheme in the embodiment of the present invention is clearly and completely described,
Obviously, described embodiment only a part of embodiment of the present invention, rather than whole embodiments.
Based on the embodiment in the present invention, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, should all belong to the scope of protection of the invention.
Term " first ", " second " in description and claims of this specification and above-mentioned accompanying drawing, "
Three ", the (if present) such as " 4th " is for distinguishing similar object, without specific for describing
Order or precedence.It should be appreciated that the data so used can exchange in the appropriate case, so as to this
In the embodiment that describes can be implemented with the order in addition to the content for illustrating or describing herein.In addition,
Term " comprising " and " having " and their any deformation, it is intended that cover it is non-exclusive include, for example,
Process, method, system, product or the equipment for containing series of steps or unit are not necessarily limited to clearly
Those steps or unit listed, but may include not list clearly or for these processes, side
The intrinsic other steps of method, product or equipment or unit.
Instantly with the development of mechanics of communication, the epoch of big data are moved towards gradually, in face of of such a size number
According to amount of storage, independent storage server has been difficult to meet.Have much for the technology of big data,
And distributed storage technology is the key technology of big data system.Distributed storage technology can be more masters
Being locally stored for machine shares out, using the storage system that the multiple host is unified as one, when wherein appointing
When what main frame needs some data or the file in system, appointing for this storage system can be accessed
What main frame, so as to obtain the data or file.
Distributed file system HDFS is to be used to obtain widest distributed storage technology so far.
In HDFS, the main frame of actual storage data file is referred to as data host Data Node, as Data
Node not only can also obtain the data of needs with data storage or file by accessing other main frames
Or file, HDFS include more such Data Node.Specific access method is to appoint in HDFS
What Data Node can be according to the data or file generated file metadata, then can be by this document member number
According to storage to another specifically dedicated for storing on the main frame of this document metadata, storage this document member
The main frame of data is referred to as metadata main frame Name Node.It should be noted that in general,
In HDFS, two Name Node are often had, it is active and standby each other, same content is stored, to prevent
Wherein one faulty or uncontrollable situation such as invaded.Specifically, when answering in Data Node1
When needing to read a data or file with program, or user requires to look up one using Data Node1
When data or file, Name Node typically can be first accessed, and ask it to return to the data or file
File metadata, then determine that data or file are actual according to Name Node return this document metadata
The main frame Data Node2 of storage, then obtain the data or file from the Data Node2 kinds.
However, Name Node in HDFS are as a main frame, in face of the extension of system, increasingly
More Data Node need to scan for data or file, and a main frame faces so big volumes of searches,
Its service ability is limited.Due to Name Node service ability often be insufficient to reply so it is a large amount of
Search, be likely to result in slowing for Data Node search, serious possibly even causes system to collapse
Burst, so that the scale of system is difficult to continue to extend.
Therefore, in embodiments of the present invention, it is proposed that a kind of data-storage system and data search method,
For distributed storage file metadata, due to the All hosts in system can storage file metadata,
Without All Files metadata is all centrally stored on a certain or two specific main frame, therefore
When increasing with the scale of system, it can be used for the main frame of file metadata of storage also increasingly
It is more, you can it is more and more stronger to receive the service ability of the inquiry to file metadata, therefore the extension of system
It will not be influenceed by the amount of storage of file metadata and on the volumes of searches of this document metadata.
In view of this, as shown in figure 1, being a kind of frame for data-storage system that the embodiment of the present invention proposes
Structure schematic diagram, the data-storage system are made up of multiple host, and the main frame can be used as metadata main frame,
For storage file metadata, and return to file metadata.The main frame is also used as inquiring about main frame,
For when receiving the metadata lookup request to file destination metadata, being asked according to the metadata lookup
It is determined that being stored with the metadata main frame of this document metadata, and this document member is obtained from the metadata main frame
Data.It should be noted that the inquiry main frame and the metadata main frame may be same main frame, that is, work as
, please according to the metadata lookup when inquiring about metadata lookup request of the main frame reception to file destination metadata
When to ask determination to be stored with the metadata main frame of this document metadata be the machine, this document can be obtained from the machine
Metadata., can also be it is determined that being stored with the member of this document metadata in other feasible embodiments
During data host, first inquire about whether the machine is stored with this document metadata, be not construed as limiting herein.
Optionally, in some feasible embodiments, inquiry main frame possibly can not be looked into directly by metadata
Request is looked for determine to be stored with the target metadata main frame of the file destination metadata, in this case, should
Main frame in data-storage system is also used as routing table main frame, and the routing table main frame, which is used to store, to be route
Table clause, the routing table entry are used to indicate the target metadata main frame for being stored with the file destination metadata.
Specifically, in embodiments of the present invention, the metadata main frame of file metadata and storage this document metadata
Corresponding relation can be stored as a kind of routing table formed in the form of file directory, the road
One file metadata and storage this document metadata can be indicated by each routing table entry in table
Metadata main frame corresponding relation.In embodiments of the present invention, the routing table is divided into multiple routes
Table clause, it is respectively stored in each main frame of system, in another angle, it may also be said in system
The routing table entry of storage forms a complete routing table formed in the form of file directory.
In some feasible embodiments, the target routing lists main frame of storage target routing lists entry can be adopted
Drawn with consistent hash algorithm, then either inquiring about main frame needs to inquire about for obtaining target routing lists entry
The target routing lists main frame, or metadata storage host it needs to be determined that for store the target route
The target routing lists main frame of table clause, the same main frame that can be determined.
Specifically, as shown in Fig. 2 it is the one embodiment of main frame as inquiry main frame in a kind of system
Schematic diagram, the inquiry main frame include：
Receiving unit 201, the metadata lookup for receiving to the file destination metadata are asked.
Determining unit 203, for being stored with the file destination member of the receiving unit 201 instruction according to determination
The target metadata main frame of data.
Acquiring unit 204, obtained for obtaining in the target metadata main frame determined from the determining unit 203
Take the file destination metadata.
Specifically, the determining unit 203 can include：
First determination subelement 2031, the metadata lookup for being received according to the receiving unit 201 please
Determination is asked to be stored with the target routing lists main frame of target routing lists entry.
Subelement 2032 is obtained, for the target routing lists master determined from first determination subelement 2031
The target routing lists entry is obtained in machine.
Second determination subelement 2033, for the target routing lists obtained according to the acquisition subelement 2032
Entry determines to be stored with the target metadata main frame of the file destination metadata.
Optionally, the inquiry main frame 200 can also include：
First memory cell 205, the mesh is obtained from the target metadata main frame for the acquiring unit 204
After marking file metadata, the file destination metadata of the acquiring unit 204 acquisition is stored.
Optionally, the inquiry main frame 200 can also include：
Search unit 202, the metadata lookup to file destination metadata is received for the receiving unit 201
After request, from the local file destination metadata, if the file destination metadata should be arrived, returning should
File destination metadata, if should trigger the determining unit 203 less than the file destination metadata and perform
Its function.
As shown in figure 3, it is that a kind of main frame in system shows as one embodiment of metadata main frame 300
It is intended to.
Second memory cell 301, for storage file metadata.
First returning unit 302, for returning to file destination metadata.
Optionally, the metadata main frame 300 can also include：
Unit 303 is deleted, after returning to the file destination metadata, deletes the file destination metadata.
As shown in figure 4, it is a kind of one embodiment schematic diagram of the main frame in system as routing table main frame.
3rd memory cell 401, for storing routing table entry.
Second returning unit 402, when receiving the routing inquiry request to target routing lists entry, returning should
The target routing lists entry of 3rd memory cell 401 storage, the target routing lists entry are used to indicate this
File destination metadata is stored in the target metadata main frame.
Optionally, the metadata main frame 400 can also include：
Updating block 403, after returning to the file destination metadata for second returning unit 402, delete
Except the file destination metadata.
It is apparent to those skilled in the art that for convenience and simplicity of description, it is above-mentioned to retouch
The specific work process for the unit stated, step 501 is may be referred in following embodiments of the method to step 510
Corresponding process, will not be repeated here.
For ease of understanding, below to the specific interactive stream of the data search method in the embodiment of the present invention
Journey is described, referring to Fig. 5, one embodiment of data search method includes in the embodiment of the present invention：
501st, main frame reception is inquired about to ask the metadata lookup of file destination metadata.
In embodiments of the present invention, the metadata lookup of file destination metadata is asked when inquiry main frame receives
When asking, the search request needed to some data or file can be inputted in terminal by user, according to this
File destination metadata is determined to the search request of data or file, so as to generate to file destination metadata
Metadata lookup request.In other feasible embodiments, user can be directly received to target text
Part metadata metadata lookup request, such as certain download software download window in directly key entry link or
Person's code so that the metadata lookup that can be received to inquiry main frame to file destination metadata can be produced
Request.Either when it be server or terminal to inquire about main frame, when inquiry main frame some applies journey in operation
Sequence so that need target data file, then generation, then can be with this to the demand of file destination metadata
Receive and the metadata lookup of file destination metadata is asked.
In some feasible embodiments, file destination metadata or file metadata can be a chains
Connect or be a seed file or be the instruction that other can indicate to store target data file,
It is not construed as limiting herein.In other feasible embodiments, inquiry main frame can also receive other main frames hair
The metadata lookup to file destination metadata sent is asked, and is not construed as limiting herein.
It should be noted that in embodiments of the present invention, when inquiry main frame is received to file destination metadata
Metadata lookup request when, can according to metadata lookup ask determination be stored with file destination metadata
Target metadata main frame.In some feasible embodiments, directly it can be asked by metadata lookup
It is determined that the target metadata main frame of file destination metadata is stored with, in other feasible embodiments,
It can also be realized by the concrete mode of following steps 504 to step 506.
502nd, main frame is inquired about from the local search file destination metadata.
Optionally, in some feasible embodiments, when inquiry main frame is received to file destination metadata
Metadata lookup request when, can be first in the local search file destination metadata.Specifically, look into
Search can be realized by the traversal of the file directory to local by asking main frame.In some feasible embodiments
In, in general, most application programs, the storage of file can be divided into multiple catalogues.Different main frames,
The data file of operation is stored under different catalogues, and application program is based on such a to the traversal of file
File directory form.It should be noted that under normal circumstances, most application program is to file system
Using and accessing for system is all the storage form for meeting file directory, if some application programs are to text
The access mode of part does not meet the storage form, then can adapt to the pattern by changing application to reach
Optimal performance.
In another feasible embodiment, inquiry main frame is looked into according to the metadata to file destination metadata
The target metadata main frame for looking for request to determine to be stored with the file destination metadata is exactly the machine, is not made herein
Limit.
If it should be noted that finding the file destination metadata by local search, perform following real
The step 503 in example is applied, if not finding the file destination metadata by local search, is performed following
Step 504 in embodiment is to step 506.
503rd, inquiry main frame returns to the file destination metadata.
In some feasible embodiments, when inquiring about main frame from local search to the file destination metadata,
This document metadata can be then returned to, to allow inquiry main frame to pass through the file destination metadata query
To target data file.
504th, main frame is inquired about to be determined to be stored with the target of target routing lists entry according to metadata lookup request
Routing table main frame.
Optionally, in some feasible embodiments, when inquiry main frame is received to file destination metadata
When metadata lookup is asked, it can be asked to determine to be stored with target routing lists entry according to metadata lookup
Target routing lists main frame.Specifically, the metadata lookup request to file destination metadata can include
One key (file directory), it then can be calculated, be obtained according to given hash function pairs key
To H (key).It should be noted that any main frame, at any time, passes through given hash
The function pair key is calculated, what the hash value calculated was just as, so as to ensure either to be used for
Need to inquire about the inquiry main frame of the target routing lists entry, it is desired nonetheless to store the target routing lists entry
Metadata main frame, corresponding node, i.e. target routing lists main frame can be always found according to hash value.Separately
Outside, in general, by hash algorithm it is also possible that each routing table entry is that near random is uniform
Ground is stored on multiple host, therefore the storage location of each routing table entry has certain stationarity.
In some feasible embodiments, in order to be backed up to routing table entry, to prevent some meanings be present
Outer situation loses data, generally requires two or the above backs up to routing table entry, it is preferred that
Target routing lists entry can be stored using two main frames, it is active and standby each other.When inquiry main frame according to
Metadata lookup request determines to be stored with the target routing lists main frame of target routing lists entry, the target road
There may be two or more by table main frame, it is preferred that one nearer from the machine can be selected, or
Shorter one of data path.
505th, inquiry main frame obtains the target routing lists entry from the target routing lists main frame.
In some feasible embodiments, if the target routing lists main frame and the inquiry main frame are not same
Main frame, the then acquisition that the inquiry main frame can be to the transmission of target routing lists main frame to the target routing lists entry
Request, when the target routing lists main frame receives the acquisition request to target routing lists entry, return to the mesh
Record routing table entry.In other feasible embodiments, if the target routing lists main frame and inquiry master
Machine is same main frame, then can perform in similar step 502 and step 503 as in above-mentioned embodiment
Shown, from the local target routing lists entry for obtaining and needing, here is omitted.It is feasible at other
Embodiment in, specifically, inquiry main frame can access the target routing lists main frame, travel through the target road
By the file directory of table main frame, to inquire about the target routing lists entry.
506th, main frame is inquired about to be determined to be stored with being somebody's turn to do for the file destination metadata according to the target routing lists entry
Target metadata main frame.
In some feasible embodiments, because target routing lists entry instruction is stored with the file destination
The target metadata main frame of metadata, therefore, it can determine to be stored with this by the target routing lists entry
The target metadata main frame of file destination metadata.Specifically, due in target routing lists entry,
The file destination metadata is corresponding with the target metadata main frame, then can determine that the target metadata main frame.
507th, inquiry main frame obtains the file destination metadata from the target metadata main frame.
In some feasible embodiments, if the target metadata main frame and the inquiry main frame are not same
Main frame, the then acquisition that the inquiry main frame can be to the transmission of target metadata main frame to the file destination metadata
Request, when the target metadata main frame receives the acquisition request to file destination metadata, return to the mesh
Record routing table entry.In other feasible embodiments, if the target metadata main frame and inquiry master
Machine is same main frame, then can perform such as the step 502 and step 503 in above-mentioned embodiment, herein not
Repeat again.In other feasible embodiments, specifically, inquiry main frame can access the target element number
According to main frame, the file directory of the target metadata main frame is traveled through, to inquire about the file destination metadata.
In some feasible embodiments, when inquiry main frame obtains the target from the target metadata main frame
After file metadata, optionally, file destination metadata can be moved to local, and delete in target
File destination metadata in metadata main frame, and update the target routing lists in target routing lists main frame
Entry.Specifically, following embodiment step 508, step 509 and steps 510 are refer to, it is necessary to say
Bright, following steps 508, step 509 and step 510 have no sequential relationship.
508th, inquiry main frame stores the file destination metadata.
In some feasible embodiments, it is preferred that when inquiry main frame determines to need that the target is commonly used
During file metadata, the file destination metadata can be stored, if to cause the target is commonly used later
File metadata, it is not necessary in access target metadata main frame, but directly in native query.If
The scheme of the storage file destination metadata uses on a large scale in systems, then most of to inquire about main frames all
The file metadata of needs can be stored, then the requirement to file metadata most of the time can be
It is local to meet, therefore a large amount of reduce scans for other main frames in system, is so as to greatly improve
The performance and efficiency of system.
509th, target routing lists main frame updates the target routing lists entry, the target routing lists after being updated
Entry, the target routing lists entry after the renewal are used to indicate that the file destination metadata is stored in the inquiry
In main frame.
In some feasible embodiments, when target routing lists main frame returns to target route to the inquiry main frame
After table clause, if after the inquiry main frame can store the file destination metadata, can be to the target road
The information is sent by table main frame, then the routing table main frame can update the target routing lists entry, obtain more
The target routing lists entry after new.In other feasible embodiments, if systemic presupposition rule is,
Store the file destination metadata after inquiring about main frame and obtaining the file destination metadata, then need not be to
The target routing lists main frame sends the information, the target routing lists main frame return the catalogue routing table entry it
Afterwards, you can voluntarily update the catalogue routing table entry.Optionally, the target route entry after the renewal can
To indicate that the file destination metadata is stored in the inquiry main frame, in other feasible embodiments,
If the target metadata main frame deletes the file destination metadata, the target routing lists main frame after the renewal
It can indicate that the file destination metadata is stored in the inquiry main frame, and delete the file destination metadata
Information in the target metadata main frame, specifically, refer to the step 510 in following embodiments.However,
If the target metadata main frame retains the file destination metadata, the target routing lists after obtained renewal
Main frame can indicate that the file destination metadata is stored in the inquiry main frame, while indicate target routing lists
Main frame can indicate that the file destination metadata is stored in the target metadata main frame, not limit herein.
510th, target metadata main frame deletes the file destination metadata.
In some feasible embodiments, optionally, when target metadata main frame returns to the inquiry main frame
After file destination metadata, if the target metadata main frame determines the machine and is of little use the file destination member number
According to can be deleted.When target metadata main frame to the inquiry main frame return file destination metadata it
Afterwards, can be to the target metadata main frame if after the inquiry main frame can store the file destination metadata
The information is sent, then the routing table main frame can delete the file destination metadata.It is feasible at other
In embodiment, if systemic presupposition rule is, stored after inquiring about main frame and obtaining the file destination metadata
The file destination metadata, then the information need not be sent to the target metadata main frame, the target element number
After the file destination metadata being returned to according to main frame, you can voluntarily delete the file destination metadata.
It should be noted that, although there is no sequential between embodiment step 508, step 509 and step 510
Relation, but step 508 and step 510 all should be corresponding with step 509.As looked into step 508
Ask main frame and store the file destination metadata, then target routing lists main frame updates the target in step 509
Routing table entry, the target routing lists entry after the renewal should indicate that the file destination metadata is stored in
In the inquiry main frame.If likewise, the target metadata main frame deletes the file destination metadata, relatively
Answer, target routing lists main frame should update the target routing lists entry, the target road after obtained renewal
It should no longer indicate that the file destination metadata is stored in the target metadata main frame by table clause.
Step 501 is entered to step 510 by interactive flow chart to data search method in above-described embodiment
Description is gone, in order to allow reader to be easier to understand, below referring to Fig. 6, the present embodiment passes through in systems
The angle of main frame data inspection method is described.It should be noted that it is succinct in order to what is described,
Do not include process of the inquiry main frame in local search in following examples, and do not include inquiry main frame storage
The file destination metadata, target routing lists main frame update the target routing lists entry and target metadata
Main frame deletes the process of the file destination metadata.Step 601 and above-described embodiment i.e. in following examples
Step 501 correspondence, the step 504 of step 602 to step 605 and above-described embodiment to step 507
It is corresponding.
Another embodiment of data search method includes in the embodiment of the present invention：
601st, main frame reception is inquired about to ask the metadata lookup of file destination metadata.
602nd, main frame is inquired about to be determined to be stored with the target of target routing lists entry according to metadata lookup request
Routing table main frame.
603rd, inquiry main frame obtains the target routing lists entry from the target routing lists main frame.
604th, main frame is inquired about to be determined to be stored with being somebody's turn to do for the file destination metadata according to the target routing lists entry
Target metadata main frame.
605th, inquiry main frame obtains the file destination metadata from the target metadata main frame.
Step 601 is identical with the step 501 of above-described embodiment in the present embodiment, step 602 to step 605
Identical to step 507 with the step 504 of above-described embodiment, here is omitted.
In above-described embodiment step 601 to step 605 by angle in systems to data search method
It is described, in order to allow reader to be easier to understand, below referring to Fig. 7, the present embodiment is by inquiring about
Data inspection method is described the angle of the unilateral flow of host computer side.
Referring to Fig. 7, another embodiment of data search method includes in the embodiment of the present invention：
701st, main frame reception is inquired about to ask the metadata lookup of file destination metadata.
702nd, main frame is inquired about by from the local search file destination metadata, judging locally whether there is the mesh
Mark file metadata.
703rd, inquiry main frame returns to the file destination metadata.
704th, main frame is inquired about to be determined to be stored with the target of target routing lists entry according to metadata lookup request
Routing table main frame.
705th, inquiry main frame obtains the target routing lists entry from the target routing lists main frame.
706th, main frame is inquired about to be determined to be stored with being somebody's turn to do for the file destination metadata according to the target routing lists entry
Target metadata main frame.
707th, inquiry main frame obtains the file destination metadata from the target metadata main frame.
708th, inquiry main frame stores the file destination metadata.
Step 701 is to the step 501 of step 708 and above-described embodiment to step 508 phase in the present embodiment
Together, here is omitted.
The main frame of system can also include server in the embodiment of the present invention, and Fig. 8 is that the embodiment of the present invention carries
A kind of server architecture schematic diagram supplied, the server 800 can be produced and compared because of configuration or performance difference
Big difference, one or more central processing units (central processing units, CPU) can be included
822 (for example, one or more processors) and memory 832, one or more storages should
With the storage medium 830 of program 842 or data 844 (such as one or more mass memory units).
Wherein, memory 832 and storage medium 830 can be of short duration storage or persistently storage.It is stored in storage
The program of medium 830 can include one or more modules (diagram does not mark), and each module can be with
Including being operated to the series of instructions in server.Further, central processing unit 822 can be set
To be communicated with storage medium 830, the series of instructions in storage medium 830 is performed on server 800
Operation.
Server 800 can also include one or more power supplys 826, one or more it is wired or
Radio network interface 850, one or more input/output interfaces 858, and/or, one or one with
Upper operating system 841, such as Windows ServerTM, Mac OS XTM, UnixTM, LinuxTM,
FreeBSDTM etc..
Main frame in the signified system of the embodiment of the present invention, can be terminal or server, only
Possessing has the function of inquiry main frame and metadata main frame, it is preferred that can also possess routing table master
The function of machine.Specifically, terminal can be used as, including mobile phone, tablet personal computer, PDA (Personal Digital
Assistant, personal digital assistant), POS (Point of Sales, point-of-sale terminal), vehicle-mounted computer etc. appoint
Meaning terminal device, as shown in figure 9, being illustrated by taking mobile phone as an example, for convenience of description, illustrate only
The part related to the embodiment of the present invention, particular technique details do not disclose, refer to the embodiment of the present invention
Method part：
Fig. 9 is illustrated that the block diagram of the part-structure of the mobile phone related to terminal provided in an embodiment of the present invention.
With reference to figure 9, mobile phone includes：Radio frequency (Radio Frequency, RF) circuit 910, memory 920,
Input block 930, display unit 940, sensor 950, voicefrequency circuit 960, Wireless Fidelity (wireless
Fidelity, WiFi) part such as module 970, processor 980 and power supply 990.People in the art
Member is appreciated that the handset structure shown in Fig. 9 does not form the restriction to mobile phone, can include than figure
Show more or less parts, either combine some parts or different parts arrangement.
In several embodiments provided herein, it should be understood that disclosed system, device and
Method, it can realize by another way.For example, device embodiment described above is only to show
Meaning property, for example, the division of the unit, only a kind of division of logic function can when actually realizing
To there is other dividing mode, such as multiple units or component can combine or be desirably integrated into another
System, or some features can be ignored, or not perform.Another, shown or discussed is mutual
Coupling or direct-coupling or communication connection can be INDIRECT COUPLING by some interfaces, device or unit
Or communication connection, can be electrical, mechanical or other forms.
For convenience and simplicity of description, the specific work process of the server of foregoing description or terminal, can
With reference to the corresponding process in above method embodiment, will not be repeated here.
The unit illustrated as separating component can be or may not be it is physically separate, make
It can be for the part that unit is shown or may not be physical location, you can with positioned at a place,
Or it can also be distributed on multiple NEs.Can select according to the actual needs part therein or
Person's whole unit realizes the purpose of this embodiment scheme.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit,
Can also be that unit is individually physically present, can also two or more units be integrated in a list
In member.Above-mentioned integrated unit can both be realized in the form of hardware, can also use software function list
The form of member is realized.
If the integrated unit is realized in the form of SFU software functional unit and is used as independent production marketing
Or in use, it can be stored in a computer read/write memory medium.Based on such understanding, sheet
Part that the technical scheme of invention substantially contributes to prior art in other words or the technical scheme
It can completely or partially be embodied in the form of software product, the computer software product is stored in one
In storage medium, including some instructions to cause a computer equipment (can be personal computer,
Server, or network equipment etc.) perform all or part of step of each embodiment methods described of the present invention
Suddenly.And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD
Etc. it is various can be with the medium of store program codes.
Described above, the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；
Although the present invention is described in detail with reference to the foregoing embodiments, one of ordinary skill in the art should
Work as understanding：It can still modify to the technical scheme described in foregoing embodiments, or to it
Middle some technical characteristics carry out equivalent substitution；And these modifications or replacement, do not make appropriate technical solution
Essence depart from various embodiments of the present invention technical scheme spirit and scope.
Claims (11)
1. a kind of data-storage system, it is characterised in that including multiple host, the system includes：
Metadata main frame, for storage file metadata, return to file destination metadata；
Main frame is inquired about, the metadata lookup for receiving to the file destination metadata is asked, it is determined that depositing
The target metadata main frame of the file destination metadata is contained, is obtained from the target metadata main frame
The file destination metadata.
2. system according to claim 1, it is characterised in that also include：
Routing table main frame, for storing routing table entry, return to the target routing lists entry, the mesh
Mark routing table entry is used to indicate that the file destination metadata is stored in the target metadata main frame.
3. system according to claim 2, it is characterised in that the inquiry main frame includes determining unit,
The determining unit is used to determine the target metadata main frame for being stored with the file destination metadata, described
Determining unit includes：
First determination subelement, for asking determination to be stored with target routing lists according to the metadata lookup
The target routing lists main frame of entry；
Subelement is obtained, in the target routing lists main frame that is determined from first determination subelement
Obtain the target routing lists entry；
Second determination subelement, for according to it is described acquisition subelement obtain the target routing lists entry,
It is determined that it is stored with the target metadata main frame of the file destination metadata.
4. system according to claim 3, it is characterised in that the inquiry main frame also includes：
Memory cell, for obtaining the target from the target metadata main frame when the inquiry main frame
After file metadata, the file destination metadata is stored.
5. system according to claim 4, it is characterised in that the target routing lists main frame also includes：
Updating block, for after the target routing lists entry is returned, updating the target routing lists
Entry, the target routing lists entry after being updated, the target routing lists entry after the renewal are used to refer to
Show that the file destination metadata is stored in the inquiry main frame.
6. according to the system of claim 4 or 5, it is characterised in that the target metadata main frame is also
Including：
Unit is deleted, after returning to the file destination metadata, deletes the file destination member number
According to.
7. according to system any one of claim 1-5, it is characterised in that the inquiry main frame is also
Including：
Search unit, for after the inquiry main frame receives metadata lookup request, in local
The file metadata is searched for, if it is true to trigger the lookup main frame less than the file metadata for search
Surely the step of being stored with the target metadata main frame of the file destination metadata.
8. a kind of data search method, it is characterised in that for any one as described in claim 1-7
System, methods described include：
Main frame reception is inquired about to ask the metadata lookup of file destination metadata；
The inquiry main frame determines to be stored with the target metadata main frame of the file destination metadata；
The inquiry main frame obtains the file destination metadata from the target metadata main frame.
9. method according to claim 8, it is characterised in that the inquiry main frame has determined storage
Stating the target metadata main frame of file destination metadata includes：
The inquiry main frame determines to be stored with the mesh of target routing lists entry according to metadata lookup request
Mark routing table main frame；
The inquiry main frame obtains the target routing lists entry from the target routing lists main frame；
The inquiry main frame determines to be stored with the file destination metadata according to the target routing lists entry
The target metadata main frame.
10. method according to claim 8, it is characterised in that the main frame of inquiring about is from the target
After the file destination metadata is obtained in metadata main frame, in addition to：
The inquiry main frame stores the file destination metadata.
11. according to claim 8-10 methods describeds, it is characterised in that the inquiry main frame is received to mesh
After the metadata lookup request for marking file metadata, in addition to：
File destination metadata described in the inquiry main frame from local search；
If searching the file destination metadata, the file destination metadata is returned；
If search less than the file destination metadata, trigger the inquiry main frame determine to be stored with it is described
The step of target metadata main frame of file destination metadata.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108449376A (en) * | 2018-01-31 | 2018-08-24 | 合肥和钧正策信息技术有限公司 | A kind of load-balancing method of big data calculate node that serving enterprise |
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