CN103064927A - Data access method and device of distributed file system - Google Patents
Data access method and device of distributed file system Download PDFInfo
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Abstract
The invention discloses a data access method and device of a distributed file system. The method includes that the distributed file system receives an access request sent by a tenant; configuration information which is prestored and corresponds to the tenant is searched in the distributed file system according to the access request, and the configuration information includes data storage configuration of the tenant; and the distributed file system achieves data to enable the tenant to access to tenant data according to the configuration information. By means of the data access method and device of the distributed file system, the access request sent by the tenant can be received by the distributed file system, then the configuration information which is prestored and corresponds to the tenant is searched in the distributed file system according to the access request, access of the tenant to data of the tenant can be achieved, data access is performed according to the configuration information of the tenant so that problems caused by coupling degree of data storage are solved, data sharing can be conveniently achieved, the safety of the tenant data can be further improved, and efficient data access can be achieved.
Description
Technical field
The present invention relates to computer realm, particularly, relate to a kind of data access method and device of distributed file system.
Background technology
Along with the development of software engineering and cloud computing technology, the concept that software is namely served (Software As AService is called for short SAAS) has obtained popularizing.And the core of cloud computing, that is, service is available anywhere, and therefore, many tenants (Multi-Tenancy) technology also becomes extremely important on service provides.Many tenants technology refers to the service provider and moves single cover system in service end, uses total system or service by the multi-user, and guarantees data isolation and security between a plurality of users.Because many tenants have shared application program, system software and hardware, so the service provider can be saved effectively because the cost that the many reasons such as environment configurations produce.
But in the situation that the tenant is on a grand scale, the realization of many tenants technology will face the problem of following two aspects:
(1) along with the continuous increase of the tenant of system scale, can cause the ability of single tenant's service is reduced, therefore, system can run into scaling concern;
(2) in many Tenant systems, owing to needing the data security between the assurance tenant, and can not have influence on other tenants' data security in the situation that need to go wrong in certain tenant's data, so be necessary the tenant is isolated, and tenant's isolation will cause the increase of system maintenance cost.
Distributed file system is as a kind of extendible file system, and performance and the extensibility of good file service is provided, can be as the data storage of cloud computing.On the one hand, existing distributed file system has effectively overcome the problem that system extension faces.On the other hand, distributed system mainly adopts following several mode to realize user management, thereby same when supporting many tenants:
(mode one) rights management of configure user and file in file system can be set different authorities to the user of each client, and each user can have access to specific file;
(mode two) distributes to different users with different catalogues, is isolated from each other between the catalogue, so that different tenants can realize that subregion uses to distributed system, thereby realizes the isolation between the tenant;
(mode three) specifically stores distributed file system by the upper layer application management document as bottom data, technique construction users such as usage data storehouses, upper strata, carry out the means such as file management.
(mode four) uses Intel Virtualization Technology by virtual machine, and the service encapsulates that the tenant is needed is virtual machine or individual data file, with data placement in distributed file system.
But existing above-mentioned many tenants support method to have comparatively significantly defective at aspects such as security, isolations in the distributed file system.
At first, tenant's deposit data degree of coupling existing problems adopt the deposit data of supporting many tenants based on user mode in such scheme, and different tenants' data may still leave identical data serving node in, are unfavorable for the isolation between the data.
Secondly, tenant's safety issue is supported many tenants in upper layer application, need application layer according to tenant's information isolated data, has problems in security.If a tenant changes or upgrade application, may cause other tenants' data to go wrong.
At last, the problem of data use-pattern, application layer is supported many tenants, only for specific application, deposits respectively a plurality of tenants' data such as individual table or a plurality of database in usage data storehouse, can not support all data to carry out many tenant's access; The virtual machine mode is so that exist many parts of redundant datas, so that can not share redundant data between the tenant between the tenant.
For isolating weak effect, the low problem of security in the correlation technique between the distributed system tenant, effective solution is proposed not yet at present.
Summary of the invention
For isolating weak effect, the low problem of security in the correlation technique between the distributed system tenant, the invention provides a kind of data access method and device of distributed file system, can realize better isolating between the tenant, improve simultaneously the security of data.
According to one aspect of the present invention, a kind of data access method of distributed file system is provided, this implementation method comprises:
Distributed file system receives the request of access that the tenant sends;
According to request of access, in distributed file system, search the pre-stored configuration information corresponding with the tenant, wherein, configuration information comprises tenant's data stored configuration;
Distributed file system realizes that according to configuration information the tenant is to the access of this tenant data.
Wherein, the method further comprises:
Configuration information with the tenant is stored in the distributed file system in advance.
And the method also comprises:
The tenant is information with tenant's Information encapsulation of carry request and tenant in advance, and information is sent to distributed file system as request of access, to carry out the carry command operation.
Further, searching the pre-stored configuration information corresponding with the tenant in distributed file system comprises:
Search configuration information corresponding to tenant in the configuration management server from distributed file system, determine the catalogue of tenant's correspondence in distributed system according to the configuration information of searching, and the catalogue of searching is notified to the tenant.
And, the tenant with the catalogue of notice as the root node of this tenant's file system and carry to local file system, and carry out follow-up data access with this root node as skew.
In addition, this data stored configuration comprises one of following:
The configuration sharing of the data corresponding with the tenant, tenant's performance requirement, tenant's reliability requirement, tenant's security requirement, the strategy of tenant's data Replica.
And, after distributed file system is according to the request of access access data corresponding with the tenant, further comprise:
Distributed file system notice client is finished accessing operation.
And configuration information further comprises tenant's accounts information.
According to a further aspect in the invention, provide a kind of DAA of distributed file system, this implement device comprises:
Receiver module is used for receiving the request of access that the tenant sends;
Search module, be used for according to request of access, search the pre-stored configuration information corresponding with the tenant in distributed file system, wherein, configuration information comprises tenant's data stored configuration;
Access modules is used for according to configuration information, realizes that the tenant is to the access of this tenant data.
And this DAA also comprises:
Storage control module is used in advance tenant's configuration information is stored in distributed file system
Wherein, the data stored configuration comprises one of following:
The configuration sharing of the data corresponding with the tenant, tenant's performance requirement, tenant's reliability requirement, tenant's security requirement, the strategy of tenant's data Replica.
In addition, configuration information further comprises tenant's accounts information.
Data access method and implement device by distributed file system of the present invention, can make distributed file system receive the request of access that the tenant sends, then in distributed file system, search the pre-stored configuration information corresponding with the tenant according to request of access, and then the separately access of data of realization tenant, owing to being that configuration information according to the tenant carries out data access, solved thus the problem that causes because of the deposit data degree of coupling, and be convenient to realize (for example sharing of data, sharing of redundant data), but also the security that can further improve tenant data realizes efficient data access.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use among the embodiment, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the process flow diagram according to the data access method of the distributed file system of the embodiment of the invention;
Fig. 2 is the block diagram according to the DAA of the distributed file system of the embodiment of the invention;
Fig. 3 is the block diagram according to the many tenants' of support of the embodiment of the invention distributed file system.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, the every other embodiment that those of ordinary skills obtain belongs to the scope of protection of the invention.
According to embodiments of the invention, provide a kind of data access method of distributed file system.
As shown in Figure 1, the data access method according to the distributed file system of the embodiment of the invention comprises:
Step S101, distributed file system receives the request of access that the tenant sends;
Step S103 according to request of access, searches the pre-stored configuration information corresponding with the tenant in distributed file system, wherein, configuration information comprises tenant's data stored configuration;
Step S105, distributed file system realizes that according to configuration information the tenant is to the access of this tenant data.
Wherein, the method further comprises:
Configuration information with the tenant is stored in the distributed file system in advance.
And the method also comprises:
The tenant is information with tenant's Information encapsulation of carry request and tenant in advance, and information is sent to distributed file system as request of access, to carry out the carry command operation.
Further, searching the pre-stored configuration information corresponding with the tenant in distributed file system comprises:
Search configuration information corresponding to tenant in the configuration management server from distributed file system, determine the catalogue of tenant's correspondence in distributed system according to the configuration information of searching, and the catalogue of searching is notified to the tenant.
And, the tenant with the catalogue of notice as the root node of this tenant's file system and carry to local file system, and carry out follow-up data access with this root node as skew.
In addition, this data stored configuration comprises one of following:
The configuration sharing of the data corresponding with the tenant, tenant's performance requirement, tenant's reliability requirement, tenant's security requirement, the strategy of tenant's data Replica.
And, after distributed file system is according to the request of access access data corresponding with the tenant, further comprise:
Distributed file system notice client is finished accessing operation.
And configuration information further comprises tenant's accounts information.
In actual applications, can realize by following steps the access of tenant data: (step 1) client carry file system; (step 2) tenant is to access and the read-write operation of file.
The step of (step 1) client carry file system comprises:
Client becomes message with current tenant's file system mounted request with tenant's Information encapsulation, sends to distributed file system, is processed the file system mounted order of tenant's client by meta data server;
Meta data server is after receiving the carry request that tenant's client is sent, obtain corresponding tenant's directory information and data store configuration information from tenant's configuration management server, and in the distributed file system name space, find corresponding directory information, return the client of supporting the tenant.
Client with the root node of tenant's catalogue as this tenant's file system, is mounted in the local file system after receiving that corresponding carry is replied.Afterwards, all file system access all take this root node as skew, are sent request of access to meta data server, thereby the tenant's catalogue that has effectively realized distributed file system derives.Concerning the tenant, the file system directories of current derivation is the root directory of local file system.
(step 2) tenant comprises access and the read-write operation step of file:
The application data that client is sent current tenant uses request and tenant's Information encapsulation to become file system access requests, (for example send to the metadata support module, file system access requests can send to meta data server), determine how to carry out data read-write operation by the metadata support module.
Meta data server is after the read-write requests of receiving tenant's client, at first use tenant's information from stored configuration corresponding to configuration management server intermediate queries tenant, this stored configuration can comprise configuration sharing, performance requirement, reliability requirement and the security requirement of data, the meta data server of selection correspondence and the strategy of data Replica.Afterwards, the read-write requests of data is sent to data server, and according to the data Replica strategy, copy data on a plurality of data servers.If the tenant need to realize physical isolation, need fast data access performance, and need two copy data replication strategies, then meta data server at first needs to select without data partition corresponding to other tenants' data server, select as much as possible at a high speed simultaneously and the data server close to the tenant, and with the packing of the copy information of these data, these message packings are sent to client.
Client can send to data read-write operation above the data server after the information and replication policy that receive the data server that metadata returns, prepares the data access strategy.
Data server stores data and tenant's information on the corresponding subregion into after the data storage request that receives the client tenant, realizes according to the inside of distributed file system simultaneously, automatically safeguards copy information and data consistency.After finishing, all operations notify client to finish a tenant's data read-write operation.So far, client is finished data read-write operation one time.
A kind of DAA of distributed file system is provided according to another embodiment of the invention.
As shown in Figure 2, this DAA comprises:
And this implement device also comprises:
Storage control module is used in advance tenant's configuration information is stored in distributed file system
Wherein, the data stored configuration comprises one of following:
The configuration sharing of the data corresponding with the tenant, tenant's performance requirement, tenant's reliability requirement, tenant's security requirement, the strategy of tenant's data Replica.
In addition, configuration information further comprises tenant's accounts information.
Said apparatus can be applied to support many tenants distributed file system.As shown in Figure 3, can use the system of said apparatus can comprise the server of following several types:
Tenant's client 34 provides tenant's file system access interface, is responsible for realizing tenant's data access demand, leads to as required the middle configuration management server of distributed file system, and metadata and data server are mutual.
For the configuration service on the configuration management server, should comprise tenant's information, tenant's information specifically can comprise tenant's account information, tenant's name, UID, quota information of data etc.And, in many tenants of distributed file system internal support characteristic, realized efficient data storage, guaranteed simultaneously security and the isolation of data access.
The functions such as in addition, this system can also realize that tenant's client virtual directory is derived, many tenants' file read-write support and intelligent multi-tenant data are reshuffled.
Tenant's client virtual directory exports as:
Many tenants client is according to current tenant's information, to the file system mounted information of distributed file system starting client.
Meta data server obtains the catalogue that needs derivation according to tenant's information from configuration management server, and the result is returned to client.
Client with the root directory of this catalogue as client, is carried out carry according to the catalogue that derives, and all access in back all conduct interviews as the basis take this catalogue.
Many tenants' file read-write support is:
Many tenants client sends to the meta data server of distributed file system with current tenant's information and file read-write request packing.
Meta data server gets access to data store strategy corresponding to tenant according to current tenant's information above configuration management server, select corresponding data server, returns to client.Data store strategy comprises current tenant to the demand of data isolation, needs to support physical isolation or virtual isolation; To the performance requirement of data access, whether data are stored in speedy storage equipment or memory device at a slow speed, need to store data on the nearer storage server of reason tenant client location; Whether the reliability of the data problem needs tenant's data are carried out many copy replications; Whether the security policies of data needs data are encrypted and deposits, and use which kind of cryptographic algorithm.
The configuration information that client is returned according to meta data server, data are sent to data server, carry out the data storage operation by data server, the data access performance that the detailed process of data storage and tenant need, data trnascription, security etc. are determined by the concrete access of distributed file system.
Intelligence multi-tenant data method for reconfiguration is:
After the tenant data configuration modification of management to management server, management server is initiatively initiated the tenant data reconfiguration request to meta data server.
Meta data server is after receiving the tenant data reconfiguration request, at first above tenant's management server, obtain the new configuration information of tenant data, and according to new tenant's configuration information, initiate the data reconfiguration request to the data server of correspondence, processed by data server.
Data server utilizes the built-in Data Migration means of distributed file system after receiving tenant's data reconfiguration request, corresponding data moved in the corresponding data server, and the copy configuration required according to new configuration information change data.After data server is finished the configuration information change, the notice meta data server, the tenant data reconfiguration operation is finished.
In addition, when the user stores data in distributed file system, requirement and the storage policy of multiple storage can be set.
For example, when there is demand in the tenant to the isolation of data storages, the isolation method of data can be set, mainly comprise and adopt physical isolation mode or virtual isolation method.If adopt the physical isolation mode, then each tenant's data placement is to above the different physical data servers.Physical isolation comprises the physical location isolation of data server node, can be at different rack, and different Physical Extents, different data centers etc.; If adopt virtual isolation method, then a plurality of tenants' data placement is on same shared physical server, and the data storage location between each tenant is virtual isolation.
The data model storage configuration comprises the performance requirement of data storage simultaneously, for example, specifying tenant's data is need to leave on the speedy storage equipment, simultaneously with data placement on the nearest data server of the client at tenant place, acquiescence to performance without any restriction.
In addition, also may there be demand in the tenant to the data reliability, and this demand refers to the tenant need to what rank protected data.If the tenant is high to the reliability requirement of data, then adopts the mode of multiple copies to store data, otherwise adopt the mode save data of simple single copy.The tenant only need to the demand of specified data reliability get final product when configuration, and the realization of this difference reliability can realize by distributed file system is inner.
In addition, the tenant also can be to the requirement of data security, and this demand refers to the tenant and need to adopt which kind of means to guarantee the security of data block.Adopt stored in clear still to need at first data to be encrypted to store again, and adopt which kind of data encryption means.
In addition, the present invention can also realize that intelligent tenant data reshuffles.
Particularly, after the tenant data configuration information of management server changed, management server was initiated the tenant data reconfiguration request to meta data server.
In sum, by means of technique scheme of the present invention, receive the request of access that the tenant sends by making distributed file system, then in distributed file system, search the pre-stored configuration information corresponding with the tenant according to request of access.Last distributed file system realizes that according to configuration information the tenant is to the access of this tenant data.Solve thus the problem that deposit data degree of coupling problem, tenant data safety issue and redundant data can not be shared, realized efficient data storage, guaranteed simultaneously security and the isolation of data access, and so that many tenants can share redundant data.
Namely, support many tenants' implementation method by this distributed file system, can support many tenants' configuration server, meta data server, data server, client and many tenants' virtual directory to derive, realized many tenants' the built-in support of distributed file system, take full advantage of reading and writing data and copy that distributed file system provides, Grading And Zoning mechanism.Support the various configurations of tenant's data storage, comprise isolation, the Performance And Reliability configuration.Support intelligent tenant data to reshuffle, after tenant's configuration variation, automatically configure tenant's data message.Realize comparing with existing many tenants, support the multiple flexible configuration of tenant data, virtual support tenant catalogue derives, and takes full advantage of file operation interface and the function of distributed file system, supports intelligent tenant data to reshuffle.
Below only be preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the data access method of a distributed file system is characterized in that, described method comprises:
Distributed file system receives the request of access that the tenant sends;
According to described request of access, in distributed file system, search the pre-stored configuration information corresponding with described tenant, wherein, described configuration information comprises described tenant's data stored configuration;
Distributed file system realizes that according to described configuration information described tenant is to the access of this tenant data.
2. data access method according to claim 1 is characterized in that, further comprises:
Configuration information with described tenant is stored in the distributed file system in advance.
3. data access method according to claim 1 is characterized in that, further comprises:
Described tenant is information with tenant's Information encapsulation of carry request and described tenant in advance, and described information is sent to distributed file system as request of access, to carry out the carry command operation.
4. data access method according to claim 3 is characterized in that, searches the pre-stored configuration information corresponding with described tenant and comprise in distributed file system:
Search configuration information corresponding to described tenant in the configuration management server from distributed file system, determine the catalogue of described tenant correspondence in described distributed system according to the described configuration information of searching, and the described catalogue that will search is notified to described tenant.
5. data access method according to claim 4 is characterized in that, the described catalogue that described tenant will notify to local file system, and is carried out follow-up data access with this root node as skew as the root node of this tenant's file system and carry.
6. data access method according to claim 1 is characterized in that, it is one of following that described data stored configuration comprises:
The configuration sharing of the data corresponding with described tenant, described tenant's performance requirement, described tenant's reliability requirement, described tenant's security requirement, the strategy of described tenant's data Replica.
7. data access method according to claim 6 is characterized in that, after distributed file system is according to the described request of access access data corresponding with described tenant, further comprises:
Distributed file system notifies described client to finish accessing operation.
8. data access method according to claim 1 is characterized in that, described configuration information further comprises tenant's accounts information.
9. the DAA of a distributed file system is characterized in that, described device comprises:
Receiver module is used for receiving the request of access that the tenant sends;
Search module, be used for according to described request of access, search the pre-stored configuration information corresponding with described tenant in distributed file system, wherein, described configuration information comprises described tenant's data stored configuration;
Access modules is used for according to described configuration information, realizes that described tenant is to the access of this tenant data.
10. DAA according to claim 9 is characterized in that, described implement device comprises:
Storage control module is used in advance described tenant's configuration information is stored in distributed file system.
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