CN103747073A - Distributed caching method and system - Google Patents
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Abstract
The embodiment of the invention provides a distributed caching method and a distributed caching system, and relates to the field of data storage. The data access speed of the distributed caching system is increased. The method comprises the following steps that the distributed caching system acquires a data operation request of a service application, and performs hash operation according to a key value of data indicated to be operated by the data operation request to obtain the identification information of a virtual queue vBucket corresponding to the data; the distributed caching system acquires a corresponding relationship between the identification information of the vBucket and a caching service node, determines a first caching service node corresponding to the identification information of the vBucket according to the corresponding relationship, and allocates the data operation request to the first caching service node for corresponding data operation. The embodiment of the invention is used for distributed data caching.
Description
Technical field
The present invention relates to field of data storage, relate in particular to a kind of method and system of distributed caching.
Background technology
Constantly universal along with Internet technology, there is the growth of explosion type in the data volume of transmitting on the Internet, wherein, and application server reading out data showing in browser from database, many network applications are also all saved in data in database.Along with concentrating of the increase of data volume, access, increased the burden of database and caused the response of database to worsen, the impacts such as website display delay.
In order to address the above problem, in prior art, apply to more and more widely distributed caching technology, wherein, existing distributed caching adopts host-guest architecture more, be that master cache service node is set up data directory for storing from the data message of buffer memory service node storage, application server is after receiving user's data request information, according to this data request information, obtain the target data in this master cache service node, if this master cache service node does not have this target data of buffer memory, this master cache service node goes access from buffer memory service node according to this data directory, and after getting this target data, this target data is sent to this application server.Meanwhile, this master cache service node also needs to manage each storage data from buffer memory service node, considers load balancing.
Visible, in existing distributed caching pattern, the burden of master cache service node is very large, when many application servers are initiated data access request to distributed cache system simultaneously, can increase the response time of master cache server, reduce the speed of data access.
Summary of the invention
The invention provides a kind of method and system of distributed caching, can improve the data access speed of distributed cache system.
For achieving the above object, embodiments of the invention adopt following technical scheme:
First aspect, provides a kind of method of distributed caching, is applied to the distributed cache system that comprises at least two buffer memory service nodes, and described method comprises:
Obtain the data operation request of service application; Wherein, described data operation request comprises the key assignments of the data of the indicated operation of described data operation request;
According to described key assignments, by Hash hash computing, obtain the identification information of the virtual queue vBucket of corresponding described data;
Obtain the corresponding relation of described vBucket identification information and buffer memory service node;
According to described corresponding relation, determine the first buffer memory service node that described vBucket identification information is corresponding, and described data operation request is assigned to described the first buffer memory service node carries out corresponding data manipulation.
In the possible implementation of the first of first aspect, described method also comprises:
The vBucket storing in described the first buffer memory service node is copied and obtains backing up vBucket, and described backup vBucket is stored in the second buffer memory service node;
When described the first buffer memory service node breaks down, described data operation request is switched on described the second buffer memory service node and carries out corresponding data manipulation.
In conjunction with first aspect or the possible implementation of the first, in the possible implementation of the second, described method also comprises:
Obtain data reconstruction instruction;
VBucket in described the first buffer memory service node is moved to the 3rd buffer memory service node;
The corresponding relation of described vBucket and described the first buffer memory service node is changed to the corresponding relation of described vBucket and described the 3rd buffer memory service node.
In conjunction with first aspect or the possible implementation of the first, in the third possible implementation, described method also comprises:
Adjust the memory capacity of described the first buffer memory service node.
In conjunction with first aspect or the possible implementation of the first, in the 4th kind of possible implementation, described method also comprises:
The access rights of described the first buffer memory service node are set;
Describedly described data operation request is assigned to described buffer memory service node carries out corresponding data manipulation and comprise:
When definite user corresponding to described data operation request meets access rights, described data operation request is assigned to described buffer memory service node and carries out corresponding data manipulation.
Second aspect present invention provides a kind of distributed cache system, comprises at least one buffer memory service node, and described distributed cache system also comprises distributed agent equipment and corresponding relation configuration device;
Described distributed agent equipment, for receiving the data operation request of service application; Wherein, described data operation request comprises the key assignments of the data of the indicated operation of described data operation request;
Described distributed agent equipment also for, according to described key assignments, by Hash hash computing, obtain the identification information of the virtual queue vBucket of corresponding described data;
Described corresponding relation configuration device, for obtaining the corresponding relation of described vBucket identification information and buffer memory service node;
Described distributed agent equipment also for, the described corresponding relation getting according to described corresponding relation configuration device is determined the first buffer memory service node that described vBucket identification information is corresponding, and described data operation request is assigned on described the first buffer memory service node and carries out corresponding data manipulation.
In the possible implementation of the first of second aspect, described distributed cache system comprises data cached copying equipment;
Described data cached copying equipment is used for, and the vBucket in described the first buffer memory service node is copied and obtains backing up vBucket, and described backup vBucket is stored in the second buffer memory service node.
In conjunction with second aspect or the possible implementation of the first, in the possible implementation of the second, described distributed cache system comprises data reconstruction equipment;
Described data reconstruction equipment is used for, and obtains data reconstruction instruction, and the vBucket in described the first buffer memory service node is moved in the 3rd buffer memory service node;
Described corresponding relation configuration device specifically for, the corresponding relation of described vBucket and described the first buffer memory service node is changed to the corresponding relation of described vBucket and described the 3rd buffer memory service node.
In conjunction with second aspect or the possible implementation of the first, in the third possible implementation, described distributed cache system comprises capacity configuration equipment;
Described capacity configuration equipment is used for, and adjusts the memory capacity of described the first buffer memory service node.
In conjunction with second aspect or the possible implementation of the first, in the 4th kind of possible implementation, described distributed cache system comprises identity-validation device;
Described identity-validation device is for arranging access rights to described the first buffer memory service node;
Described distributed agent equipment specifically for, when definite user corresponding to described data operation request meets access rights, described data operation request is assigned to described buffer memory service node and carries out corresponding data manipulation.
Adopt such scheme, distributed cache system is when getting the data operation request of service application, according to data key assignments, by Hash operation, obtain vBucket identification information that should data, and inquire about vBucket identification information and determine with the corresponding relation of buffer memory service node the first buffer memory service node that this vBucket identification information is corresponding, this data operation request is assigned to this first buffer memory service node and carries out corresponding data manipulation.Like this, owing to there is no dividing of primary and secondary between each buffer memory service node, this distributed cache system, when visit data, without passing through the transfer of master cache service node, thereby has improved the data access speed of this distributed cache system.
Accompanying drawing explanation
The schematic flow sheet of the method for a kind of distributed caching that Fig. 1 provides for the embodiment of the present invention;
The application scenarios schematic diagram of a kind of distributed cache system that Fig. 2 provides for the embodiment of the present invention;
A kind of distributed cache system that Fig. 3 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the present invention provides a kind of method of distributed caching, and as shown in Figure 1, the executive agent of the method is distributed cache system, comprising:
S101, distributed cache system obtain the data operation request of service application.
Wherein, this data operation request comprises the key assignments of the data of the indicated operation of this data operation request.
It should be noted that, data are by Key(key) and Value(value) two parts formation, wherein, Key is equivalent to the index of data, Value is the data content of Key representative, and a Value may have a plurality of key assignments, and user can have access to data content according to key assignments.
Particularly, the application scenarios of this distributed cache system as shown in Figure 2, user carries out business operation in client, as user's data operation request of triggering for generating during browsing page in browser, application server is after receiving this data operation request, this data operation request is sent to this distributed cache system, by this distributed cache system, carries out corresponding data manipulation.
S102, this distributed cache system obtain vBucket identification information that should data by Hash hash algorithm according to this key assignments.
It should be noted that, in distributed caching pattern, be provided with a plurality of buffer memory service nodes, on each buffer memory service node, store a plurality of data cells, this data cell, as the basis of distributed caching, is the integral body that cannot cut apart, as a sequence information or a user profile, wherein, the corresponding virtual queue vBucket of each data cell.
Particularly, this distributed cache system stores the address information of each vBucket, and each vBucket address is numbered, form the vBucket address table of band numbering, formed the corresponding relation of numbering with vBucket address, the corresponding vBucket address of each numbering, if the first numbering is corresponding with a vBucket address, by this key assignments being carried out to Hash operation, obtain the first cryptographic Hash corresponding to described the first numbering, also just can obtain by described the first cryptographic Hash the address of a vBucket.
S103, this distributed cache system obtain the corresponding relation of vBucket identification information and buffer memory service node.
Illustratively, this distributed cache system records each vBucket and the corresponding relation of storing the buffer memory service node of this vBucket when initialization, set up the mapping table of vBucket and buffer memory service node, if this distributed cache system when determining a certain vBucket identification information, the buffer memory service node that can determine that by inquiring about this mapping table this vBucket identification information is corresponding.
Alternatively, this distributed cache system obtains data reconstruction instruction, and according to this data reconstruction instruction, the vBucket in this first buffer memory service node is moved to the 3rd buffer memory service node, the corresponding relation of this vBucket and this first buffer memory service node is changed to the corresponding relation of this vBucket and the 3rd buffer memory service node.
Particularly, when this distributed cache system adds new buffer memory service node, this distributed cache system obtains data reconstruction instruction, and according to this data reconstruction instruction, the vBucket storing in all buffer memory service nodes is moved, for example, vBucket in the buffer memory service node adjacent with this buffer memory service node newly adding (i.e. the 3rd buffer memory service node) is stored in this buffer memory service node newly adding, simultaneously, consider load balancing, vBucket in other buffer memory service nodes may also can move accordingly, and in the mapping table of above-mentioned vBucket and buffer memory service node, vBucket after renewal migration and the corresponding relation of buffer memory service node.Like this, because the corresponding relation of change vBucket and buffer memory service node can not obtain vBucket identification information that should data to impact by Hash hash algorithm according to data key assignments to this distributed cache system, therefore, this distributed cache system can be realized dynamic capacity-expanding.
In addition, when a certain buffer memory service node in this distributed cache system breaks down, this distributed cache system need to remove this buffer memory service node, now the vBucket in this buffer memory service node need to be moved equally, and upgrade afterwards vBucket after migration and the corresponding relation of buffer memory service node in migration.
S104, this distributed cache system determine according to this corresponding relation the first buffer memory service node that this vBucket identification information is corresponding, and this data operation request is assigned to this buffer memory service node carries out corresponding data manipulation.
Alternatively, this distributed cache system copies the vBucket storing in this first buffer memory service node to obtain backing up vBucket, and this backup vBucket is stored in the second buffer memory service node,, when this first buffer memory service node breaks down, this distributed cache system is switched to this data operation request on this second buffer memory service node and carries out corresponding data manipulation.
It should be noted that, each buffer memory service node stores active data, be Active VBucket, save data copy again, be Replica VBucket, that is to say, each VBucket can be replicated and each backup vBucket can be stored in buffer memory service node equally, wherein, the Active vBucket of same vBucket and Replica vBucket can not be stored in same buffer memory service node.
In addition, this distributed cache system, when data key assignments is carried out to Hash operation, can obtain corresponding Active vBucket, and Replica vBucket can not be accessed to.
Particularly, this the first buffer memory service node stores the Active vBucket of this vBucket, when this first buffer memory service node breaks down, the Replica vBucket of this vBucket is converted to Active vBucket, and this data operation request is switched on the second buffer memory service node of storing this Replica vBucket and carries out corresponding data manipulation.
Alternatively, this distributed cache system is adjusted the memory capacity of this first buffer memory service node.
Alternatively, this distributed cache system arranges the access rights of this first buffer memory service node, and when definite user corresponding to this data operation request meets access rights, this data operation request is assigned to this buffer memory service node and carries out corresponding data manipulation.
Particularly, this distributed cache system allows user to configure the different buffer memory service nodes of different port access, and can authentication password be set to this buffer memory service node,, when this distributed cache system is when definite user corresponding to this data operation request meets access rights (as correct in authentication password), this data operation request is assigned to this buffer memory service node and carries out corresponding data manipulation.
Adopt said method, distributed cache system is when getting the data operation request of service application, according to data key assignments, by Hash operation, obtain vBucket identification information that should data, and inquire about vBucket identification information and determine with the corresponding relation of buffer memory service node the first buffer memory service node that this vBucket identification information is corresponding, this data operation request is assigned to this first buffer memory service node and carries out corresponding data manipulation.Like this, owing to there is no dividing of primary and secondary between each buffer memory service node, this distributed cache system, when visit data, without passing through the transfer of master cache service node, thereby has improved the data access speed of this distributed cache system.
The embodiment of the present invention provides a kind of distributed cache system, and as shown in Figure 3, this distributed cache system comprises: at least two buffer memory service nodes 31, and distributed agent equipment 32 and corresponding relation configuration device 33, wherein,
These at least two buffer memory service nodes 31, for data cached.
This distributed agent equipment 32, for receiving the data operation request of service application; Wherein, this data operation request comprises the key assignments of the data of the indicated operation of this data operation request.
This distributed agent equipment 32 also for, according to this key assignments, by Hash hash computing, obtain the identification information to virtual queue vBucket that should data.
This corresponding relation configuration device 33, for obtaining the corresponding relation of this vBucket identification information and buffer memory service node.
This distributed agent equipment 32 also for, this corresponding relation getting according to this corresponding relation configuration device 33 is determined the first buffer memory service node that this vBucket identification information is corresponding, and this data operation request is assigned on this first buffer memory service node and carries out corresponding data manipulation.
It should be noted that, data are by Key(key) and Value(value) two parts formation, wherein, Key is equivalent to the index of data, Value is the data content of Key representative, and a Value may have a plurality of key assignments, and user can have access to data content according to key assignments.
Particularly, the application scenarios of this distributed cache system as shown in Figure 2, user carries out business operation in client, as user's data operation request of triggering for generating during browsing page in browser, application server is after receiving this data operation request, this data operation request is sent to this distributed cache system, by this distributed cache system, carries out corresponding data manipulation.
In addition, in distributed caching pattern, be provided with a plurality of buffer memory service nodes, on each buffer memory service node, store a plurality of data cells, this data cell, as the basis of distributed caching, is the integral body that cannot cut apart, as a sequence information or a user profile, wherein, the corresponding virtual queue vBucket of each data cell.
Particularly, this distributed cache system stores the address information of each vBucket, and each vBucket address is numbered, form the vBucket address table of band numbering, formed the corresponding relation of numbering with vBucket address, the corresponding vBucket address of each numbering, if the first numbering is corresponding with a vBucket address, by this key assignments being carried out to Hash operation, obtain the first cryptographic Hash corresponding to described the first numbering, also just can obtain by described the first cryptographic Hash the address of a vBucket.
Illustratively, this distributed cache system records each vBucket and the corresponding relation of storing the buffer memory service node of this vBucket when initialization, set up the mapping table of vBucket and buffer memory service node, if this distributed cache system when determining a certain vBucket identification information, the buffer memory service node that can determine that by inquiring about this mapping table this vBucket identification information is corresponding.
Alternatively, this distributed cache system comprises data reconstruction equipment 35, this data reconstruction equipment is used for, obtain data reconstruction instruction, vBucket in this first buffer memory service node is moved in the 3rd buffer memory service node, this corresponding relation configuration device 33 specifically for, the corresponding relation of this vBucket and this first buffer memory service node is changed to the corresponding relation of this vBucket and the 3rd buffer memory service node.
Particularly, when this distributed cache system adds new buffer memory service node, this distributed cache system obtains data reconstruction instruction, and according to this data reconstruction instruction, the vBucket storing in all buffer memory service nodes is moved, for example, vBucket in the buffer memory service node adjacent with this buffer memory service node newly adding (i.e. the 3rd buffer memory service node) is stored in this buffer memory service node newly adding, simultaneously, consider load balancing, vBucket in other buffer memory service nodes may also can move accordingly, and in the mapping table of above-mentioned vBucket and buffer memory service node, vBucket after renewal migration and the corresponding relation of buffer memory service node.Like this, because the corresponding relation of change vBucket and buffer memory service node can not obtain vBucket identification information that should data to impact by Hash hash algorithm according to data key assignments to this distributed cache system, therefore, this distributed cache system can be realized dynamic capacity-expanding.
In addition, when a certain buffer memory service node in this distributed cache system breaks down, this distributed cache system need to remove this buffer memory service node, now the vBucket in this buffer memory service node need to be moved equally, and upgrade afterwards vBucket after migration and the corresponding relation of buffer memory service node in migration.
Alternatively, this distributed cache system comprises data cached copying equipment 34, this data cached copying equipment 34 for, the vBucket in this first buffer memory service node is copied and obtains backing up vBucket, and this backup vBucket is stored in the second buffer memory service node.
Particularly, this distributed cache system copies the vBucket storing in this first buffer memory service node to obtain backing up vBucket, and this backup vBucket is stored in the second buffer memory service node,, when this first buffer memory service node breaks down, this distributed cache system is switched to this data operation request on this second buffer memory service node and carries out corresponding data manipulation.
It should be noted that, each buffer memory service node stores active data, be Active VBucket, save data copy again, be Replica VBucket, that is to say, each VBucket can be replicated and each backup vBucket can be stored in buffer memory service node equally, wherein, the Active vBucket of same vBucket and Replica vBucket can not be stored in same buffer memory service node.
In addition, this distributed cache system, when data key assignments is carried out to Hash operation, can obtain corresponding Active vBucket, and Replica vBucket can not be accessed to.
Particularly, this the first buffer memory service node stores the Active vBucket of this vBucket, when this first buffer memory service node breaks down, the Replica vBucket of this vBucket is converted to Active vBucket, and this data operation request is switched on the second buffer memory service node of storing this Replica vBucket and carries out corresponding data manipulation.
Alternatively, this distributed cache system comprises capacity configuration equipment 36, this capacity configuration equipment 36 for, adjust the memory capacity of this first buffer memory service node.
Alternatively, this distributed cache system comprises identity-validation device 37, this identity-validation device 37 for, this the first buffer memory service node is arranged to access rights, this distributed agent equipment 32 specifically for, when definite user corresponding to this data operation request meets access rights, this data operation request is assigned to this buffer memory service node and carries out corresponding data manipulation.
Particularly, this distributed cache system allows user to configure the different buffer memory service nodes of different port access, and can authentication password be set to this buffer memory service node,, when this distributed cache system is when definite user corresponding to this data operation request meets access rights (as correct in authentication password), this data operation request is assigned to this buffer memory service node and carries out corresponding data manipulation.
Adopt above-mentioned distributed cache system, this distributed cache system is when getting the data operation request of service application, according to data key assignments, by Hash operation, obtain vBucket identification information that should data, and inquire about vBucket identification information and determine with the corresponding relation of buffer memory service node the first buffer memory service node that this vBucket identification information is corresponding, this data operation request is assigned to this first buffer memory service node and carries out corresponding data manipulation.Like this, owing to there is no dividing of primary and secondary between each buffer memory service node, this distributed cache system, when visit data, without passing through the transfer of master cache service node, thereby has improved the data access speed of this distributed cache system.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (10)
1. a method for distributed caching, is characterized in that, is applied to the distributed cache system that comprises at least two buffer memory service nodes, and described method comprises:
Obtain the data operation request of service application; Wherein, described data operation request comprises the key assignments of the data of the indicated operation of described data operation request;
According to described key assignments, by Hash hash computing, obtain the identification information of the virtual queue vBucket of corresponding described data;
Obtain the corresponding relation of described vBucket identification information and buffer memory service node;
According to described corresponding relation, determine the first buffer memory service node that described vBucket identification information is corresponding, and described data operation request is assigned to described the first buffer memory service node carries out corresponding data manipulation.
2. method according to claim 1, is characterized in that, described method also comprises:
The vBucket storing in described the first buffer memory service node is copied and obtains backing up vBucket, and described backup vBucket is stored in the second buffer memory service node;
When described the first buffer memory service node breaks down, described data operation request is switched on described the second buffer memory service node and carries out corresponding data manipulation.
3. method according to claim 1 and 2, is characterized in that, described method also comprises:
Obtain data reconstruction instruction;
VBucket in described the first buffer memory service node is moved to the 3rd buffer memory service node;
The corresponding relation of described vBucket and described the first buffer memory service node is changed to the corresponding relation of described vBucket and described the 3rd buffer memory service node.
4. method according to claim 1 and 2, is characterized in that, described method also comprises:
Adjust the memory capacity of described the first buffer memory service node.
5. method according to claim 1 and 2, is characterized in that, described method also comprises:
The access rights of described the first buffer memory service node are set;
Describedly described data operation request is assigned to described buffer memory service node carries out corresponding data manipulation and comprise:
When definite user corresponding to described data operation request meets access rights, described data operation request is assigned to described buffer memory service node and carries out corresponding data manipulation.
6. a distributed cache system, comprises at least two buffer memory service nodes, it is characterized in that, described distributed cache system also comprises distributed agent equipment and corresponding relation configuration device;
Described distributed agent equipment, for receiving the data operation request of service application; Wherein, described data operation request comprises the key assignments of the data of the indicated operation of described data operation request;
Described distributed agent equipment also for, according to described key assignments, by Hash hash computing, obtain the identification information of the virtual queue vBucket of corresponding described data;
Described corresponding relation configuration device, for obtaining the corresponding relation of described vBucket identification information and buffer memory service node;
Described distributed agent equipment also for, the described corresponding relation getting according to described corresponding relation configuration device is determined the first buffer memory service node that described vBucket identification information is corresponding, and described data operation request is assigned on described the first buffer memory service node and carries out corresponding data manipulation.
7. distributed cache system according to claim 6, is characterized in that, described distributed cache system comprises data cached copying equipment;
Described data cached copying equipment is used for, and the vBucket in described the first buffer memory service node is copied and obtains backing up vBucket, and described backup vBucket is stored in the second buffer memory service node.
8. according to the distributed cache system described in claim 6 or 7, it is characterized in that, described distributed cache system comprises data reconstruction equipment;
Described data reconstruction equipment is used for, and obtains data reconstruction instruction, and the vBucket in described the first buffer memory service node is moved in the 3rd buffer memory service node;
Described corresponding relation configuration device specifically for, the corresponding relation of described vBucket and described the first buffer memory service node is changed to the corresponding relation of described vBucket and described the 3rd buffer memory service node.
9. according to the distributed cache system described in claim 6 or 7, it is characterized in that, described distributed cache system comprises capacity configuration equipment;
Described capacity configuration equipment is used for, and adjusts the memory capacity of described the first buffer memory service node.
10. according to the distributed cache system described in claim 6 or 7, it is characterized in that, described distributed cache system comprises identity-validation device;
Described identity-validation device is for arranging access rights to described the first buffer memory service node;
Described distributed agent equipment specifically for, when definite user corresponding to described data operation request meets access rights, described data operation request is assigned to described buffer memory service node and carries out corresponding data manipulation.
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