CN102523205A - Determination method and device for content checksum - Google Patents
Determination method and device for content checksum Download PDFInfo
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- CN102523205A CN102523205A CN2011103985745A CN201110398574A CN102523205A CN 102523205 A CN102523205 A CN 102523205A CN 2011103985745 A CN2011103985745 A CN 2011103985745A CN 201110398574 A CN201110398574 A CN 201110398574A CN 102523205 A CN102523205 A CN 102523205A
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Abstract
The invention discloses a determination method and a determination device for a content checksum. The method comprises the following steps of: receiving a data packet; acquiring a data packet checksum generated by a network card for the data packet; and deducting additional information in the data packet checksum from the data packet checksum to obtain the content checksum of content information in the data packet, wherein the additional information comprises at least one of the checksum of a protocol header of the data packet and the checksum of a pseudo-header of the data packet. By the method and the device, the calculation amount of a system is decreased, and the performance of the system is ensured.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of content verification and definite method and device.
Background technology
Along with the fast development of the Internet and multimedia industry, the media file storage of magnanimity is had higher requirement to memory technology and systematic function.For guaranteeing high reliability, big capacity and cost performance, IT vendor and Internet service merchant usually adopt distributed file system to store data.These systems usually adopt the mode of redundant storage to guarantee to store the reliability of data, remedy the unreliable of hardware with highly reliable software, thereby cheap magnanimity distributed storage and computing system reliably are provided.
In distributed file system, because each document storage server all has the possibility that collapse takes place at any time, reasons such as hard disk corruptions, storage device error, network error all possibly cause file corruption simultaneously.In order to address this is that, need a cover mechanism to check data integrity.For how to guarantee data integrity; The simplest method is exactly whether the copy content of more same data block contents on different document storage servers be consistent; But this way relates to the transmission and the comparison of data block; The transmission operation can be to the storage networking build-up of pressure, and the compare operation meeting takies the computing capability of system.Therefore, way at present commonly used, be calculate same data block the verification of each copy with, twin check is checked the integrality of storing data with whether consistent through such method then.
Under this implementation pattern, though reduced verification pressure, calculation check and calculating that still need be a large amount of to storage networking.How to reduce the expense of file verification and calculating, guarantee data integrity when guaranteeing the entire system performance, correlation technique does not also have very good solution.
Summary of the invention
The invention provides a kind of content verification and definite method and device, solve in the correlation technique calculation check at least and need system to carry out the problem of great amount of calculation.
According to an aspect of the present invention, provide a kind of content verification and definite method, comprising: receive packet; Obtain packet verification that network interface card produces to packet with; The verification of specified data bag and deduction incidental information wherein as the content verification of the content information in the packet with, wherein, incidental information comprise following one of at least: the verification of the pseudo-head of the verification of the protocol header of packet and, packet and.
Preferably; Receive at document storage server under the situation of packet; In the verification of specified data bag with wherein incidental information of deduction as the content verification of packet with afterwards, also comprise: content information in the document storage server storage packet and content verification thereof and.
Preferably; Receive at the file access server under the situation of packet; At the verification of specified data bag and wherein incidental information of deduction as the content verification of packet and afterwards, also comprise: the file access server is to from the content verification of the packet of a plurality of document storage servers with compare; If with consistent, then the file access server provides the file service function of packet to the user from the content verification of the packet of a plurality of document storage servers for comparative result indication.
Preferably; Receive at the file access server under the situation of packet; At the verification of specified data bag and wherein incidental information of deduction as the content verification of packet and afterwards, also comprise: the file access server is with the content verification with the content verification that is stored in meta data server in advance with compare; If the verification of comparative result instruction content with the content verification that is stored in meta data server in advance and consistent, then the file access server provides the file service function of packet to the user.
Preferably; The file access server with the content verification and with the content verification that is stored in meta data server in advance and compare before, also comprise: the file access server with the file directory/filename of packet, packet on document storage server distribution and content verification and store meta data server into.
According to another aspect of the present invention, provide a kind of content verification and definite device, comprising: receiver module is used to receive packet; Acquisition module, be used to obtain packet verification that network interface card produces to packet with; Determination module, be used for the verification of specified data bag and deduction incidental information wherein as the content verification of the content information of packet with, wherein, incidental information comprise following one of at least: the verification of the pseudo-head of the verification of the protocol header of packet and, packet and.
Preferably, the content verification and definite device be positioned under the situation of document storage server, the content verification and definite device also comprise: memory module, content information and the content verification thereof that is used for storing packet with.
Preferably, the content verification and definite device be positioned under the situation of file access server, the content verification and definite device also comprise: first comparison module is used for from the content verification of the packet of a plurality of document storage servers with compare; First notification module is used in comparative result indication under the content verification of the packet of a plurality of document storage servers and the consistent situation, and the circular document access server provides the file service function of packet to the user.
Preferably, the content verification and definite device be positioned under the situation of file access server, the content verification and definite device also comprise: second comparison module is used for the content verification with the content verification that is stored in meta data server in advance with compare; Second notification module, be used for the verification of comparative result instruction content with content verification that is stored in meta data server in advance and consistent situation under, the circular document access server provides the file service function of packet to the user.
Preferably, said apparatus also comprises: the 3rd notice module, be used for the circular document access server with the file directory/filename of packet, packet on document storage server distribution and content verification and store meta data server into.
Through the present invention; To packet verification of calculating by network interface card in the transmission of data packets and the operation of deducting incidental information; Can obtain required content verification with; Solve calculation check in the correlation technique and needed system to carry out the problem of great amount of calculation, reduced the calculating pressure of system, guaranteed the performance of system.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 be according to the content verification of the embodiment of the invention and the flow chart of definite method;
Fig. 2 be transmission calculation document Network Based according to the preferred embodiment of the invention verification and structural representation;
Fig. 3 be according to the content verification of the embodiment of the invention and the structured flowchart of definite device;
Fig. 4 be content verification according to the preferred embodiment of the invention and the structured flowchart one of definite device;
Fig. 5 be content verification according to the preferred embodiment of the invention and the structured flowchart two of definite device;
Fig. 6 be content verification according to the preferred embodiment of the invention and the structured flowchart three of definite device;
Fig. 7 be content verification according to the preferred embodiment of the invention and the structured flowchart four of definite device.
Embodiment
Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.
Below with reference to accompanying drawing and combine embodiment to specify the present invention.
Fig. 1 be transmission calculation document Network Based according to the preferred embodiment of the invention verification and structural representation; As shown in Figure 1; In the distributed file system of the embodiment of the invention transmission calculation document Network Based verification and system, comprise meta data server, document storage server and file access server.
Meta data server is in charge of the file metadata information in the distributed file system, comprises file directory/filename, the distribution of file data blocks on storage server, the verification and the information of preserving each file data blocks simultaneously.When providing file data blocks to read service, with verification with send to the file access server and carry out verification and contrast, use verification and information.When providing file data blocks to write service, the verification that receives data block from document storage server with, obtain verification and information.
Document storage server is used for according to the main control server metadata information, the access site on hard disk of file control data piece, and carry out transmission of data blocks with the file access server.In the time of the data block packet to be written of receiving that the file access server sends; Except from packet, extracting data block contents information; Also from packet, extract the packet verification with; After deducting incidental information then, the verification that has just generated data block contents with, at last the verification of data block with send to meta data server and deposit.
The file access server is responsible for providing access interface to the user, thereby the file service function is provided, and the file access server also is responsible for and the mutual file metadata information of meta data server, and with the mutual file data blocks content of document storage server.In the time of the data block packet to be read of receiving that document storage server sends; Except from packet, extracting data block contents information; Also from packet, extract the packet verification with, then behind the deduction incidental information, the verification that has just obtained the current data block content with; At last from meta data server obtain the original verification of this data block with, whether twin check with consistent.
When data block is transmitted on storage networking through the UDP/TCP agreement, network card equipment all can to protocol massages accomplish verification and calculating, filling and transmission.The agreement verification and be the protocol data bag verification with, be verification to protocol header, pseudo-head and user data.Since the verification that needs data block with, therefore when from packet, extracting the agreement checksum field after, the verification of protocol header and pseudo-head and part deduction, just obtained data block contents verification and.Like this, through of the calculating of a spot of protocol header with pseudo-head, just obtained than the verification of long data piece content with.
Through above-mentioned preferred embodiment; In distributed file system, with the packet verification that produces by network interface card hardware in the file data blocks transmission course with, be used for the verification and the calculating of this document data block; Realize " the distributed transmission data block; the Distributed Calculation verification with ", significantly reduced the pressure of the verification of distributed file system file and calculating, realized the data integrity inspection in the time of assurance entire system performance.
Below in conjunction with Fig. 1, to content verification of the present invention and definite method be described in detail.
Fig. 2 be according to the content verification of the embodiment of the invention and the flow chart of definite method, as shown in Figure 2, comprise that following step S202 is to step S206.
Step S202 receives packet.
Step S204, obtain packet verification that network interface card produces to packet with.
Step S206, the verification of specified data bag and deduction incidental information wherein as the content verification of the content information in the packet with, wherein, incidental information comprise following one of at least: the verification of the pseudo-head of the verification of the protocol header of packet and, packet and.
In the correlation technique, by the packet receiving terminal voluntarily the content information in the calculated data bag the content verification with, calculating pressure is big.In the embodiment of the invention; Consider packet verification that in transmission of data packets network interface card all can the calculated data bag with; Therefore through can obtain this packet verification and the operation of deducting incidental information required content verification and; Reduce the calculating pressure of system, guaranteed the performance of system.Need to prove that above-mentioned steps S202 both can be carried out by document storage server to step S206, also can be carried out by the file access server.
Below be executive agent with document storage server and file access server respectively just, to the foregoing verification and definite method be described in detail.
(1) be under the situation of executive agent at document storage server; Document storage server receives packet; Obtain packet verification that network interface card produces to packet with; Then the verification of specified data bag and deduction incidental information wherein as the content verification of the content information in the packet with, wherein, incidental information comprise following one of at least: the verification of the pseudo-head of the verification of the protocol header of packet and, packet and.
And then, in the verification of document storage server specified data bag with wherein incidental information of deduction as the content verification of packet with afterwards, above-mentionedly also comprise: content information in the document storage server storage packet and content verification thereof and.Like this, with content information and content verification thereof with store, for follow-up operation of reading provides the foundation.
(2) be under the situation of executive agent at the file access server; The file access server receives packet; Obtain packet verification that network interface card produces to packet with; Then the verification of specified data bag and deduction incidental information wherein as the content verification of the content information in the packet with, wherein, incidental information comprise following one of at least: the verification of the pseudo-head of the verification of the protocol header of packet and, packet and.
And then at the verification of file access server specified data bag and wherein incidental information of deduction as the content verification of packet and afterwards, also comprise: the file access server is to from the content verification of the packet of a plurality of document storage servers with compare; If with consistent, then the file access server provides the file service function of this packet to the user from the content verification of the packet of a plurality of document storage servers for comparative result indication.Like this,, with whether consistent on a plurality of document storage servers can avoid by the content verification of the more same packet of file access server because the packet that file corruption causes is inconsistent.
Distortion as above-mentioned compare operation; In this preferred embodiment; At the verification of file access server specified data bag and wherein incidental information of deduction as the content verification of packet and afterwards, also comprise: the file access server is with the content verification with the content verification that is stored in meta data server in advance with compare; If the verification of comparative result instruction content with the content verification that is stored in meta data server in advance and consistent, then the file access server provides the file service function of this packet to the user.Like this; Since be exclusively used in the memory contents verification and meta data server on memory contents can guarantee accurate usually; Therefore;, with whether consistent on document storage server and meta data server can avoid because the packet that file corruption causes is inconsistent, and reduce the system resource that compare operation takies by the content verification of the more same packet of file access server.
In order to reduce the amount of calculation of system; The file access server with the content verification and with the content verification that is stored in meta data server in advance and compare before, also comprise: the file access server with the file directory/filename of packet, packet on document storage server distribution and content verification and store meta data server into.
Need to prove; Can in computer system, carry out in the step shown in the flow chart of accompanying drawing such as a set of computer-executable instructions; And; Though logical order has been shown in flow chart, in some cases, can have carried out step shown or that describe with the order that is different from here.
The embodiment of the invention provide a kind of content verification and definite device, this device can be used to realize the foregoing verification and definite method.Fig. 3 be according to the content verification of the embodiment of the invention and the structured flowchart of definite device, as shown in Figure 3, comprising: receiver module 31, acquisition module 32 and determination module 33.Be elaborated in the face of its structure down.
Fig. 4 be content verification according to the preferred embodiment of the invention and the structured flowchart one of definite device; As shown in Figure 4; The content verification and definite device be positioned under the situation of document storage server; The content verification and definite device also comprise: memory module 34, content information and the content verification thereof that is used for storing packet with.
Fig. 5 be content verification according to the preferred embodiment of the invention and the structured flowchart two of definite device; As shown in Figure 5; The content verification and definite device be positioned under the situation of file access server; The content verification and definite device also comprise: first comparison module 35 is used for from the content verification of the packet of a plurality of document storage servers with compare; First notification module 36 is connected to first comparison module 35, is used in comparative result indication under the content verification of the packet of a plurality of document storage servers and the consistent situation, and the circular document access server provides the file service function of packet to the user.
Fig. 6 be content verification according to the preferred embodiment of the invention and the structured flowchart three of definite device; As shown in Figure 6; The content verification and definite device be positioned under the situation of file access server; The content verification and definite device also comprise: second comparison module 37 is used for the content verification with the content verification that is stored in meta data server in advance with compare; Second notification module 38; Be connected to second comparison module 37; Be used for the verification of comparative result instruction content with content verification that is stored in meta data server in advance and consistent situation under, the circular document access server provides the file service function of packet to the user.
Fig. 7 be content verification according to the preferred embodiment of the invention and the structured flowchart four of definite device; As shown in Figure 7; Said apparatus also comprises: the 3rd notice module 39, be used for the circular document access server with the file directory/filename of packet, packet on document storage server distribution and content verification and store meta data server into.
Need to prove, the content verification that device is described among the embodiment and definite device corresponding to above-mentioned method embodiment, its concrete implementation procedure had been carried out detailed description in method embodiment, repeat no more at this.
In sum, according to the abovementioned embodiments of the present invention, provide a kind of content verification and definite method and device.Through the present invention; To packet verification of calculating by network interface card in the transmission of data packets and the operation of deducting incidental information; Can obtain required content verification with; Solve calculation check in the correlation technique and needed system to carry out the problem of great amount of calculation, reduced the calculating pressure of system, guaranteed the performance of system.
Obviously, it is apparent to those skilled in the art that above-mentioned each module of the present invention or each step can realize with the general calculation device; They can concentrate on the single calculation element; Perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element; Thereby; Can they be stored in the storage device and carry out, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize by calculation element.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
- A content verification and definite method, it is characterized in that comprising:Receive packet;Obtain network interface card give packet verification that said packet produces with;Confirm said packet verification and deduction incidental information wherein as the content verification of the content information in the said packet with; Wherein, said incidental information comprise following one of at least: the verification of the pseudo-head of the verification of the protocol header of said packet and, said packet and.
- 2. method according to claim 1; It is characterized in that; Receive at document storage server under the situation of said packet; Confirm said packet verification with deduction incidental information wherein as the content verification of said packet with afterwards, also comprise: said document storage server store in the said packet said content information and content verification thereof and.
- 3. method according to claim 1 is characterized in that, receives at the file access server under the situation of said packet, is confirming that said packet verification and deduction incidental information wherein as the content verification of said packet and afterwards, also comprise:Said file access server is to from the content verification of the said packet of a plurality of document storage servers with compare;If the content verification of the said said packet from a plurality of document storage servers of said comparative result indication is with consistent, then said file access server provides the file service function of said packet to the user.
- 4. method according to claim 1 is characterized in that, receives at the file access server under the situation of said packet, is confirming that said packet verification and deduction incidental information wherein as the content verification of said packet and afterwards, also comprise:Said file access server is with said content verification with the content verification that is stored in meta data server in advance with compare;If said comparative result indicate said content verification with the content verification that is stored in meta data server in advance and consistent, then said file access server provides the file service function of said packet to the user.
- 5. method according to claim 4; It is characterized in that; Said file access server with said content verification and with the content verification that is stored in meta data server in advance and compare before, also comprise: said file access server with the file directory/filename of said packet, said packet on document storage server distribution and said content verification and store said meta data server into.
- A content verification and definite device, it is characterized in that comprising:Receiver module is used to receive packet;Acquisition module, be used to obtain network interface card give packet verification that said packet produces with;Determination module; Be used for confirming said packet verification and deduction incidental information wherein as the content verification of the content information of said packet with; Wherein, said incidental information comprise following one of at least: the verification of the pseudo-head of the verification of the protocol header of said packet and, said packet and.
- 7. device according to claim 6; It is characterized in that; Said content verification and definite device be positioned under the situation of document storage server, the content verification and definite device also comprise: memory module, said content information and the content verification thereof that is used for storing said packet with.
- 8. device according to claim 6 is characterized in that, said content verification and definite device be positioned under the situation of file access server, said content verification and definite device also comprise:First comparison module is used for from the content verification of the said packet of a plurality of document storage servers with compare;First notification module is used under the content verification of the said said packet from a plurality of document storage servers of said comparative result indication and consistent situation, notifying said file access server that the file service function of said packet is provided to the user.
- 9. device according to claim 6 is characterized in that, said content verification and definite device be positioned under the situation of file access server, said content verification and definite device also comprise:Second comparison module is used for said content verification with the content verification that is stored in meta data server in advance with compare;Second notification module, be used for said comparative result indicate said content verification with content verification that is stored in meta data server in advance and consistent situation under, notify said file access server that the file service function of said packet is provided to the user.
- 10. device according to claim 9; It is characterized in that; Also comprise: the 3rd notice module, be used to notify the file directory/filename of said file access server with said packet, said packet on document storage server distribution and said content verification and store said meta data server into.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011103985745A CN102523205A (en) | 2011-12-05 | 2011-12-05 | Determination method and device for content checksum |
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| CN2011103985745A CN102523205A (en) | 2011-12-05 | 2011-12-05 | Determination method and device for content checksum |
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Application publication date: 20120627 |