CN107665253A - Configurable MDS balance control method, device and storage medium - Google Patents
Configurable MDS balance control method, device and storage medium Download PDFInfo
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- 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
- G06F16/11—File system administration, e.g. details of archiving or snapshots
- G06F16/122—File system administration, e.g. details of archiving or snapshots using management policies
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- G06F16/10—File systems; File servers
- G06F16/16—File or folder operations, e.g. details of user interfaces specifically adapted to file systems
- G06F16/164—File meta data generation
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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
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/46—Multiprogramming arrangements
- G06F9/50—Allocation of resources, e.g. of the central processing unit [CPU]
- G06F9/5083—Techniques for rebalancing the load in a distributed system
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Abstract
The invention discloses a kind of configurable MDS balance control method, device and storage medium, this method includes：Multiple MDS are disposed on each node in the cluster in advance, and establish MDS title, sequence number and the corresponding relation with the MDS of each MDS pairings title；When needing extension, a not enabled node is chosen, and control a MDS on not enabled node to be in running status；When handover is needed, according to corresponding relation, the target MDS with to be switched MDS pairings is chosen on the destination node where to be switched MDS, and control it to switch to running status.During due to either still switching in extension, an at most only MDS is in running status on each node, and therefore, it is possible to realize, each node uniformly configures MDS in file system, so as to when reading metadata, realize the balance of the resources occupation rate of each node.In addition, this method only needs simply to configure, you can realizes deployment balance.
Description
Technical field
The present invention relates to metadata technique field, more particularly to a kind of configurable MDS balance control method, device
And storage medium.
Background technology
Data in file system are divided into general data and metadata.General data refers to the reality included in ordinary file
Data, and metadata refers to the data of the feature for describing file, such as access rights, file owner and file data
Distributed intelligence of block etc..Under normal circumstances, file system includes multiple nodes, and multiple nodes exist in a manner of cluster, altogether
With the various functions for completing file system.The distributed intelligence of file system is collecting including position and disk of the file on disk
Position in group.User needs one file of operation to obtain its metadata first, just can navigate to the position of file simultaneously
And obtain the interior perhaps association attributes of file.
Currently, metadata has two kinds of way to manages, is centralized management mode and distributed management mode respectively.It is distributed
Way to manage refers to meta data server (MDS) being stored in the arbitrary node of file system and the migration of dynamic, still,
When MDS, which is placed, excessively to be concentrated, cause each Node distributions of the MDS of running status in the cluster uneven, with to metadata
It is increasing to read and write pressure, some node occupancy resources are larger, and some nodes occupancy resource is smaller, and are needing to switch
When, a MDS in Status of Backups can be randomly selected from cluster and is in running status, therefore to the property of whole file system
There can be large effect, or even easily cause paralysis.
As can be seen here, how in file system each node uniformly configures MDS, so as to when reading metadata, realize respectively
The balance of the resources occupation rate of node is those skilled in the art's urgent problem to be solved.
The content of the invention
It is an object of the invention to provide a kind of configurable MDS balance control method, for being controlled in file system
Each node uniformly configures MDS, so as to when reading metadata, realize the balance of the resources occupation rate of each node.It is in addition, of the invention
A kind of configurable MDS corresponding with this method balance control device and computer-readable recording medium are also provided.
In order to solve the above technical problems, the present invention provides a kind of configurable MDS balance control method, including：
Multiple MDS are disposed on each node in the cluster in advance, and establish each MDS title, each MDS sequence
Row number and the corresponding relation with the MDS of each MDS pairings title；Wherein, the MDS tools on the same node
There is sequence number described in identical, and two MDS of pair relationhip be present in the same node；
When needing extension, a not enabled node is chosen in the cluster, and control on the not enabled node
One MDS is in running status, and remaining described MDS is in Status of Backups；
When handover is needed, according to the corresponding relation, choose on the destination node where to be switched MDS and treated with described
Switch the target MDS of MDS pairings, and control the target MDS to switch to running status.
Preferably, one not enabled node of selection in the cluster specifically includes：
Each node is traveled through successively, when the MDS in the running status on a node be present, is then entered
Next node, untill finding the not enabled node.
Preferably, it is described to travel through each node successively and be specially：It is ascending successively according to the order of the sequence number
Travel through each node.
Preferably, in addition to：
The corresponding relation is stored with MAP structures.
Preferably, the switching type of the to be switched MDS is in stop types and described to be cut including the to be switched MDS
Change MDS and be in Exception Type.
Preferably, determine that the to be switched MDS is in the Exception Type especially by heartbeat detecting method.
In order to solve the above technical problems, the present invention also provides a kind of configurable MDS balance control device, including：
Deployment module, multiple MDS are disposed on each node in advance in the cluster, and establish each MDS title,
Each MDS sequence number and the corresponding relation with the MDS of each MDS pairings title；Wherein, the same node
On the MDS there is sequence number described in identical, and two MDS of pair relationhip be present in the same node；
Control module, for when needing extension, a not enabled node to be chosen in the cluster, and described in control not
Enable a MDS on node and be in running status, and remaining described MDS is in Status of Backups；When handover is needed, according to
According to the corresponding relation, the target MDS with the to be switched MDS pairings is chosen on the destination node where to be switched MDS, and
The target MDS is controlled to switch to running status.
In order to solve the above technical problems, the present invention also provides a kind of configurable MDS balance control device, including storage
Device, for storing computer program；
Processor, configurable MDS as described above balance control is realized during for performing the computer program
The step of method.
In order to solve the above technical problems, the present invention also provides a kind of computer-readable recording medium, it is described computer-readable
Computer program is stored with storage medium, the computer program realizes as described above can configure when being executed by processor
MDS balance control method the step of.
Configurable MDS provided by the present invention balance control method, disposed in advance on each node in the cluster more
Individual MDS, and establish each MDS title, each MDS sequence number and the corresponding relation with the MDS of each MDS pairings title；Its
In, the MDS on same node has identical sequence number, and two MDS of pair relationhip be present in same node；When need
When extending, a not enabled node is chosen in the cluster, and controls a MDS on not enabled node to be in running status,
And remaining MDS is in Status of Backups；When handover is needed, according to corresponding relation, selected on the destination node where to be switched MDS
The target MDS with to be switched MDS pairings is taken, and control targe MDS switches to running status.Due to either extension when still
During switching, at most an only MDS is in running status on each node, and therefore, it is possible to realize, each node is equal in file system
Even configuration MDS, so as to when reading metadata, realize the balance of the resources occupation rate of each node.In addition, this method only needs letter
Single configuration, you can realize deployment balance.In addition, configurable MDS provided by the present invention balance control device and calculating
Machine readable storage medium storing program for executing also has above-mentioned beneficial effect.
Brief description of the drawings
In order to illustrate the embodiments of the present invention more clearly, the required accompanying drawing used in embodiment will be done simply below
Introduce, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for ordinary skill people
For member, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of flow chart of configurable MDS balance control method provided in an embodiment of the present invention；
Fig. 2 is the flow chart of the balance control method for the MDS that the another kind that the present embodiment provides can configure；
Fig. 3 is a kind of structure chart of configurable MDS balance control device provided in an embodiment of the present invention；
Fig. 4 is the structure chart of another configurable MDS provided in an embodiment of the present invention balance control device.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.Based on this
Embodiment in invention, for those of ordinary skill in the art under the premise of creative work is not made, what is obtained is every other
Embodiment, belong to the scope of the present invention.
The core of the present invention is to provide a kind of configurable MDS balance control method, for being controlled in file system
Each node uniformly configures MDS, so as to when reading metadata, realize the balance of the resources occupation rate of each node.It is in addition, of the invention
A kind of configurable MDS corresponding with this method balance control device and computer-readable recording medium are also provided.
In order that those skilled in the art more fully understand the present invention program, with reference to the accompanying drawings and detailed description
The present invention is described in further detail.
Fig. 1 is a kind of flow chart of configurable MDS balance control method provided in an embodiment of the present invention.Such as Fig. 1 institutes
Show, this method includes：
S10：Multiple MDS are disposed on each node in the cluster in advance, and establish each MDS title, each MDS sequence number
And the corresponding relation with the MDS of each MDS pairings title；Wherein, the MDS on same node has identical sequence number,
And two MDS of pair relationhip be present in same node.
In specific implementation, several MDS are disposed on each node in cluster.For example, 10 can be set, certainly this
In be merely illustrative, as dispose it is several, it is necessary to be disposed according to the scale of cluster.The MDS's disposed on each node
Quantity can be with identical, can also be different.In addition, MDS in this step on each node and need not start, i.e., such node
For not enabled node, only in extension, one MDS of selection starts, that is, controls a MDS to be in running status, and in this node
Remaining MDS be in Status of Backups.
In addition, it is necessary to establish the title to each MDS, each MDS sequence number and the title with the MDS of each MDS pairings
Corresponding relation.In order to allow those skilled in the art more to understand the corresponding relation in this step, it is described in detail below.Than if any
2 active mds, 2 standby mds, it is distributed on two nodes, 4 MDS title be respectively name1,
Name2, name3 and name4, on one node, name3/name4 is on one node by name1/name2.4 MDS sequence
Row number is respectively rank1, rank2, rank3 and rank4；With the MDS of each MDS pairings title standby_for_name tables
Showing, then the MDS with name1 pairings is name2, and the MDS with name2 pairings is name1, and the MDS with name3 pairings is name4,
MDS with name4 pairings is name3.In summary, if corresponding relation (name:rank:Standby_for_name) table
If showing, then above-mentioned several 4 MDS corresponding relation is as follows：
name1:0:name2；
name2:0:name1；
name3:1:name4；
name4:1:name3；
[mds.name1], standby_for_name=name2；
[mds.name2], standby_for_name=name1；
[mds.name3], standby_for_name=name4；
[mds.name4], standby_for_name=name3；
Wherein, 0 and 1 is respectively two No. rank, and No. rank of two MDS on same node is identical.
In addition, the quantity of the MDS on each node can be odd number, or even number, in the case of even number, as above
The description of text, has tri- MDS of A, B, C for odd number, such as node, and the standby_for_name that can configure A is B, B's
Standby_for_name is C, and C standby_for_name is A.
S11：When needing extension, a not enabled node is chosen in the cluster, and control one on not enabled node
MDS is in running status, and remaining MDS is in Status of Backups.
It should be noted that the extension in this step, includes two kinds of situations：A kind of situation is that any one in cluster saves
Point is all not enabled node, i.e., needs to control a MDS to be in running status first in cluster (MDS state is active)；
Another situation is that node is enabled in cluster, on this basis, it is necessary to enable the MDS on other not enabled node.It is right
In the first situation, actual is cluster original state, and the MDS only needed on 1 node during original state is in running status,
And remaining MDS on the node is Status of Backups.
According to both the above situation, when needing extension, if each node is all not enabled node, one of them is chosen
MDS on node is in running status, and control remaining MDS on the node to be in Status of Backups (MDS state is
standby).As can be seen here, ensure that the MDS in running status is up to 1 on each node in this step.
S12：When handover is needed, according to corresponding relation, chosen on the destination node where to be switched MDS with it is to be switched
The target MDS of MDS pairings, and control targe MDS switches to running status.
In the process of running, the MDS on enabled node is likely to occur exception or by stop, and the MDS is to be cut
MDS is changed, in this case, for normal operation, it is necessary to which the MDS is switched, and with other MDS in this node (in backup
State) it is replaced, so as to ensure that one and only one MDS is in running status on enabled node.It should be noted that
Target MDS is intended merely to make a distinction with remaining MDS in this node, in this node, each MDS for being in Status of Backups
It is likely to become target MDS.
Preferably embodiment, to be switched MDS switching type are in stop types and to be cut including to be switched MDS
Change MDS and be in Exception Type.
If to be switched MDS switching type, which is to be switched MDS, is in stop types, then illustrate that to be switched MDS is stopped
Only, it is necessary to control one of MDS to be in running status in node where it.
For example, there is 10 MDS in this node, MDS1 is the MDS in running status, and remaining MDS2-MDS10 is in backup
State.
When MDS1 is by stop, then the node is exactly to be switched MDS, therefore, it is necessary to one is chosen in MDS2-MDS10
MDS is as target MDS, such as chooses MDS2 as target MDS, then MDS3-MDS10 is still within Status of Backups.
When MDS1 exceptions, then the node is exactly to be switched MDS, therefore, it is necessary to a MDS is chosen in MDS2-MDS10
As target MDS, such as MDS2 is chosen as target MDS, then MDS3-MDS10 is still within Status of Backups.It is being embodied
In, whether one MDS in running status of detection abnormal, is determined especially by heartbeat detecting method, if heartbeat it is abnormal or
Person stops, then to be switched MDS is at Exception Type.
It should be noted that point of step S11 and S12 without priority, Fig. 1 is a kind of concrete application scene.
The balance control method for the configurable MDS that the present embodiment provides, disposed in advance on each node in the cluster more
Individual MDS, and establish each MDS title, each MDS sequence number and the corresponding relation with the MDS of each MDS pairings title；Its
In, the MDS on same node has identical sequence number, and two MDS of pair relationhip be present in same node；When need
When extending, a not enabled node is chosen in the cluster, and controls a MDS on not enabled node to be in running status,
And remaining MDS is in Status of Backups；When handover is needed, according to corresponding relation, selected on the destination node where to be switched MDS
The target MDS with to be switched MDS pairings is taken, and control targe MDS switches to running status.Due to either extension when still
During switching, at most an only MDS is in running status on each node, and therefore, it is possible to realize, each node is equal in file system
Even configuration MDS, so as to when reading metadata, realize the balance of the resources occupation rate of each node.In addition, this method only needs letter
Single configuration, you can realize deployment balance.
On the basis of above-described embodiment, preferably embodiment, chooses a not enabled node tool in the cluster
Body includes：
Each node is traveled through successively, when the MDS in running status on a node be present, then into next node,
Untill finding not enabled node.
In order to ensure it is sequential be extended, in present embodiment, when extending every time, be required to travel through each node,
If the node has the MDS in running status, into next, untill finding not enabled node.
Preferably embodiment, traveling through each node successively is specially：It is ascending successively according to the order of sequence number
Travel through each node.
For example, No. rank from 0 to max_mds-1 (max_mds be cluster in running status MDS maximum numbers).
Fig. 2 is the flow chart of the balance control method for the MDS that the another kind that the present embodiment provides can configure.As shown in Fig. 2
On the basis of above-described embodiment, in addition to：
S20：Corresponding relation is stored with MAP structures.
By the way that corresponding relation is stored with MAP structures, the speed for finding destination node can be improved, is cut so as to improve
Speed when changing.
Fig. 3 is a kind of structure chart of configurable MDS balance control device provided in an embodiment of the present invention.Such as Fig. 3 institutes
Show, a kind of configurable MDS balance control device, including：
Deployment module 10, multiple MDS are disposed on each node in advance in the cluster, and establish each MDS title, each
MDS sequence number and the corresponding relation with the MDS of each MDS pairings title；Wherein, the MDS on same node has phase
Same sequence number, and two MDS of pair relationhip be present in same node；
Control module 11, for when needing extension, choosing a not enabled node in the cluster, and control not enabled section
A MDS on point is in running status, and remaining MDS is in Status of Backups；When handover is needed, foundation corresponding relation,
The target MDS with to be switched MDS pairings is chosen on destination node where to be switched MDS, and control targe MDS switches to operation
State.
The present embodiment provide configurable MDS balance control device, due to either extension when still switch when,
An at most only MDS is in running status on each node, and therefore, it is possible to realize, each node uniformly configures in file system
MDS, so as to when reading metadata, realize the balance of the resources occupation rate of each node.In addition, the present apparatus only needs simply to match somebody with somebody
Put, you can realize deployment balance.
Above-described embodiment for the embodiment of configurable MDS balance control device method part retouch in detail
State, the present invention also provides a kind of device corresponding with this method and computer-readable recording medium.Due to the implementation of device part
Example is mutually corresponding with the embodiment of method part, therefore the embodiment side of referring to of device and computer-readable recording medium part
The description of the embodiment of method part, it wouldn't repeat here.
Fig. 4 is the structure chart of another configurable MDS provided in an embodiment of the present invention balance control device.Such as Fig. 4
Shown, the device includes memory 20, for storing computer program；
Processor 21, configurable MDS as described above balance controlling party is realized during for performing computer program
The step of method.
The present embodiment provide configurable MDS balance control device, due to either extension when still switch when,
An at most only MDS is in running status on each node, and therefore, it is possible to realize, each node uniformly configures in file system
MDS, so as to when reading metadata, realize the balance of the resources occupation rate of each node.In addition, the present apparatus only needs simply to match somebody with somebody
Put, you can realize deployment balance.
A kind of computer-readable recording medium, computer program, computer journey are stored with computer-readable recording medium
The step of configurable MDS as described above balance control method is realized when sequence is executed by processor.
It is understood that the computer-readable recording medium in the present invention can be the storage medium such as USB flash disk, CD, this
Invention is not construed as limiting.
The computer-readable recording medium that the present embodiment provides, for performing above-mentioned configurable MDS balance controlling party
Method, during due to either still switching in extension, at most an only MDS are in running status on each node, accordingly, it is capable to
Enough realize that each node uniformly configures MDS in file system, so as to when reading metadata, realize the resources occupation rate of each node
Balance.In addition, this method only needs simply to configure, you can realizes deployment balance.
Above to configurable MDS provided by the present invention balance control method, device and computer-readable storage medium
Matter is described in detail.Each embodiment is described by the way of progressive in specification, and each embodiment stresses
The difference with other embodiment, between each embodiment identical similar portion mutually referring to.It is public for embodiment
For the device opened, because it is corresponded to the method disclosed in Example, so description is fairly simple, related part is referring to side
Method part illustrates.It should be pointed out that for those skilled in the art, the principle of the invention is not being departed from
Under the premise of, some improvement and modification can also be carried out to the present invention, these are improved and modification also falls into the claims in the present invention
In protection domain.
It should also be noted that, in this manual, such as first and second or the like relational terms be used merely to by
One entity or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or operation
Between any this actual relation or order be present.Moreover, term " comprising ", "comprising" or its any other variant meaning
Covering including for nonexcludability, so that process, method, article or equipment including a series of elements not only include that
A little key elements, but also the other element including being not expressly set out, or also include for this process, method, article or
The intrinsic key element of equipment.In the absence of more restrictions, the key element limited by sentence "including a ...", is not arranged
Except other identical element in the process including the key element, method, article or equipment being also present.
Claims (9)
- A kind of 1. configurable MDS balance control method, it is characterised in that including：Multiple MDS are disposed on each node in the cluster in advance, and establish each MDS title, each MDS sequence number And the corresponding relation with the MDS of each MDS pairings title；Wherein, the MDS on the same node has phase The same sequence number, and two MDS of pair relationhip be present in the same node；When needing extension, a not enabled node is chosen in the cluster, and control one on the not enabled node The MDS is in running status, and remaining described MDS is in Status of Backups；When handover is needed, according to the corresponding relation, chosen on the destination node where to be switched MDS with it is described to be switched The target MDS of MDS pairings, and control the target MDS to switch to running status.
- 2. configurable MDS according to claim 1 balance control method, it is characterised in that described in the cluster One not enabled node of middle selection specifically includes：Each node is traveled through successively, when the MDS in the running status on a node be present, then into next The individual node, untill finding the not enabled node.
- 3. configurable MDS according to claim 2 balance control method, it is characterised in that the traversal successively is each The node is specially：Each node is traveled through successively according to the order of the sequence number is ascending.
- 4. configurable MDS according to claim 1 balance control method, it is characterised in that also include：The corresponding relation is stored with MAP structures.
- 5. the balance control method of the configurable MDS according to claim 1-4 any one, it is characterised in that described To be switched MDS switching type is in stop types including the to be switched MDS and the to be switched MDS is in Exception Type.
- 6. configurable MDS according to claim 5 balance control method, it is characterised in that examined especially by heartbeat Survey method determines that the to be switched MDS is in the Exception Type.
- A kind of 7. configurable MDS balance control device, it is characterised in that including：Deployment module, multiple MDS are disposed on each node in advance in the cluster, and establish each MDS title, each institute State MDS sequence number and the corresponding relation with the MDS of each MDS pairings title；Wherein, on the same node The MDS has sequence number described in identical, and two MDS of pair relationhip be present in the same node；Control module, for when needing extension, a not enabled node being chosen in the cluster, and control the not enabled A MDS on node is in running status, and remaining described MDS is in Status of Backups；When handover is needed, according to institute Corresponding relation is stated, the target MDS with the to be switched MDS pairings is chosen on the destination node where to be switched MDS, and control The target MDS switches to running status.
- 8. a kind of configurable MDS balance control device, it is characterised in that including memory, for storing computer program；Processor, the configurable MDS as described in any one of claim 1 to 6 is realized during for performing the computer program Balance control method the step of.
- 9. a kind of computer-readable recording medium, it is characterised in that be stored with computer on the computer-readable recording medium Program, the configurable MDS as described in any one of claim 1 to 6 is realized when the computer program is executed by processor The step of balance control method.
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