CN104156376A - Storage method, device and server for file - Google Patents
Storage method, device and server for file Download PDFInfo
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- CN104156376A CN104156376A CN201310180414.2A CN201310180414A CN104156376A CN 104156376 A CN104156376 A CN 104156376A CN 201310180414 A CN201310180414 A CN 201310180414A CN 104156376 A CN104156376 A CN 104156376A
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000013507 mapping Methods 0.000 claims abstract description 62
- 230000005055 memory storage Effects 0.000 claims description 12
- 238000004891 communication Methods 0.000 abstract description 21
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 description 6
- 238000004364 calculation method Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/10—File systems; File servers
- G06F16/17—Details of further file system functions
- G06F16/1737—Details of further file system functions for reducing power consumption or coping with limited storage space, e.g. in mobile devices
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- General Physics & Mathematics (AREA)
- Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention belongs to the field of internet communication technologies and provides a storage method, device and server for a file. The method includes the steps that the file uploaded by a client side is received; according to a preset information digest algorithm, the digest value of the file is calculated; whether a mapping relation between the digest value and a file index exists in a file index table or not is inquired; if not, the file is sent to the file server to be stored, and a file index which is generated by the file server is received. Only one copy is stored in the server for the same files, and therefore the effective utilization rate of storage space of the server is increased.
Description
Technical field
The invention belongs to internet communication technical field, relate in particular to a kind of storage means, device and server of file.
Background technology
At present, the user of immediate communication tool is more and more, user uses the frequency of immediate communication tool more and more higher, instant communication server needs canned data also more and more, for example, in the time that some users send out a pictures in group the inside, if the user of this group thinks that this pictures is very interesting, this pictures may be dealt into another one group the inside, another one group's user may also can forward, for the identical picture of this continuous forwarding, the file memory method of existing server is which type of picture file user sends out and just deposit which type of picture file, through rough Statistics, only in instant communication group, picture uploading repetition rate reaches 50%, in this case, repeated file storage makes the file storage speed of server slow, the effective rate of utilization of storage space is low.
Summary of the invention
The embodiment of the present invention provides a kind of storage means, device and server of file, is intended to solve the problem that storage means exists the effective rate of utilization of storage space low, storage speed is slow of existing file.
On the one hand, provide a kind of storage means of file, described method comprises:
Receive the file that sends client upload;
Calculate the digest value of described file according to presupposed information digest algorithm;
In file index table, whether there are the mapping relations of described digest value and file index;
If there are not the mapping relations of described digest value and file index in File Index Table, send described file to file server and store, and receive the file index of the described file of described file server generation.
On the other hand, provide a kind of memory storage of file, described device comprises:
File receiving element, for receiving the file that sends client upload;
Digest value acquiring unit, for calculating the digest value of described file according to presupposed information digest algorithm;
Whether query unit, there are the mapping relations of described digest value and file index for file index table;
File storage unit, if there are not the mapping relations of described digest value and file index for File Index Table, sends described file to file server and stores, and receives the file index of the described file of described file server generation.
On the one hand, provide a kind of server again, described server comprises the memory storage of file as above.
In the embodiment of the present invention, receive the file that sends client upload; Calculate the digest value of described file according to presupposed information digest algorithm; In file index table, whether there are the mapping relations of described digest value and file index; If there are not the mapping relations of described digest value and file index in File Index Table, sending described file to file server stores, and receive the file index of the described file that described file server generates, the present invention, realize same file on server and only stored portion, improved the effective rate of utilization of the storage space of server.
Brief description of the drawings
Fig. 1 is the realization flow figure of the storage means of the file that provides of the embodiment of the present invention one;
Fig. 2 is the realization flow figure of the storage means of the file that provides of the embodiment of the present invention two;
Fig. 3 is the concrete structure figure of the memory storage of the file that provides of the embodiment of the present invention three;
Fig. 4 is the concrete structure figure of the memory storage of the file that provides of the embodiment of the present invention four.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
In embodiments of the present invention, receive the file that sends client upload; Calculate the digest value of described file according to presupposed information digest algorithm; In file index table, whether there are the mapping relations of described digest value and file index; If there are not the mapping relations of described digest value and file index in File Index Table, send described file to file server and store, and receive the file index of the described file of described file server generation.
Below in conjunction with specific embodiment, realization of the present invention is described in detail:
Embodiment mono-
Fig. 1 shows the realization flow of the storage means of the file that the embodiment of the present invention one provides, and taking server as executive agent, details are as follows:
It should be noted that, Message Digest 5 is the input message of random length is encrypted and produces the algorithm of the fixing pseudorandom of length input, its principal character is that ciphering process does not need key, and cannot be decrypted through the data of encrypting, only have the identical clear data of input just can obtain identical digest value through identical Message Digest 5,, while acquiring identical digest value through identical Message Digest 5, the plaintext that identical digest value is corresponding is identical.In the time using identical Message Digest 5, digest value can be used as unique identification expressly.
In step S101, receive the file that sends client upload.
In the present embodiment, described transmission client is by network and server interaction, wherein, even if server includes but not limited to communication server, SNS server.Described file includes but not limited to picture, voice, text document, application program.Server receives the file that sends client upload.In the time that server is instant communication server, transmission client is instant communication client, instant communication client sends to the file that receives instant communication client first to upload on instant communication server and to store, and receives instant communication client and obtains file from instant communication server again.
In step S102, calculate the digest value of described file according to presupposed information digest algorithm.
In the present embodiment, message digest algorithm is for the algorithm through processing output regular length digest value by the input of random length, and described presupposed information digest algorithm comprises any of MD5, SHA-1 and hash algorithm.The digest value length difference that different message digest algorithm are obtained, as MD5 algorithm digest value has 128 bits, has 160 bits with SHA-1 algorithm digest value.No matter be to use which kind of message digest algorithm, its obtain digest value can unique identification the file of input.Server calculates the digest value of described file according to presupposed information digest algorithm.
In step S103, in file index table, whether there are the mapping relations of described digest value and file index.
In the present embodiment, described File Index Table is the transmission client that records on the server file index of storage file and the table of mapping relations between the digest value of storage file on file server, and wherein file index is corresponding one by one with digest value.Described file index is the relevant information for storage file on log file server, and it includes but not limited to storage directory, the file name of file, receives client and can obtain concrete file from file server according to file index.Server is according to calculating the digest value file index table obtaining, to obtain the mapping relations that whether have described digest value and file index in File Index Table, wherein, the mapping relations of described digest value and file index can be by including but not limited to file digest values, send client id, file index, the form of service time is stored in the recent period.Wherein, described recent service time is for the limited time limit of storage file on server calculation document server, whether thereby controlling these mapping relations exists or deletes, when file storage or while being downloaded, server using the current system time as File Index Table in corresponding service time in the recent period of mapping relations of corresponding digest value and file index, increase to reach the object that this mapping relations corresponding stored file renews.The for example storage file pot-life on file server is 1 year, by recent service time and system current system Time Calculation file holding time, if the holding time exceedes 1 year, delete these mapping relations, if there is no corresponding this file of other mapping relations simultaneously, delete this storage file.File Index Table is as shown in table 1,
Table 1:
If there are not the mapping relations of described digest value and file index in File Index Table, execution step S104.
In step S104, if there are not the mapping relations of described digest value and file index in File Index Table, send described file to file server and store, and receive the file index of the described file of described file server generation.
In the present embodiment, the file that described file server sends for storage server, in concrete enforcement, file server and server can be deployed in same station server, also can independently dispose.Because digest value can be used as the unique identification of file, can judge that whether file is identical by the digest value of documents.Before storage file, in server lookup File Index Table, whether there are the mapping relations of described digest value and file index, if do not exist, send described file to file server and store, and receive the file index of the described file of described file server generation.For larger file, due to digest value length fix and length short, contrast by digest value, calculated amount is little, and can keep file only to store portion, has improved the utilization factor of storage space.
A kind of possibility is, after step S104, can also in described File Index Table, increase the mapping relations of the file index of described digest value and described file.
Concrete, by increasing the preservation situation of file in the mapping relations real time record file server in File Index Table, the effectively repeated storage of control documents.
Alternative dispensing means is after step S104, can also send described file index to receiving client, so that described reception client is downloaded described file according to described file index.
Concrete, described file index is the relevant information for storage file on log file server, it includes but not limited to storage directory, the file name of file, receive client and can obtain file from file server according to file index, simultaneously server revised file concordance list service time near-mid term.
Wherein, taking picture and instant communication server as the applicable scene of objectives object factory the present embodiment, be described as follows:
When transmission client arrives the picture of contact person's transmission, the user who sends client thinks that picture is more interesting, by sending client, this picture is forwarded in other contact persons or group, when instant communication server receives the picture that sends client submission, use MD5 algorithm to generate the MD5 digest value of this picture, inquire about in the File Index Table of instant communication server simultaneously and whether had the MD5 digest value of this picture and the mapping relations of file index, if there is no the MD5 digest value of this picture and the mapping relations of file index, be on file server, not preserve corresponding picture, instant communication server sends to file server to store in picture, receive the file index that file server generates simultaneously, in File Index Table, preserve the file index receiving, the MD5 digest value of picture and the recent service time of picture, afterwards, instant communication server sends to file index to receive the reception client that forwards picture by instant communication information, these receive client according to file index download pictures from file server, only storage is a in file server to have ensured so identical file.
The present embodiment, can reach the digest value of the file obtaining by comparative information digest algorithm, guarantees that on file server, same file is only stored portion, has improved the storage space utilization factor of file server.
Embodiment bis-
Fig. 2 shows the realization flow of the storage means of the file that the embodiment of the present invention two provides, and taking server as executive agent, details are as follows:
In step S201, receive the file that sends client upload.
In step S202, calculate the digest value of described file according to presupposed information digest algorithm.
In step S203, in file index table, whether there are the mapping relations of described digest value and file index.
Concrete, if there are not the mapping relations of described digest value and file index in File Index Table, execution step S204, if there are the mapping relations of described digest value and file index in File Index Table, execution step S205.
In step S204, if there are not the mapping relations of described digest value and file index in File Index Table, send described file to file server and store, and receive the file index of the described file of described file server generation.
In the present embodiment, the implementation of the step S101～S103 in the execution of step S201～S203 and above-described embodiment one is similar, and details are referring to the description of above-described embodiment one.
In step S205, if there are the mapping relations of described digest value and file index in File Index Table, do not store described file, upgrade the mapping relations of digest value described in described File Index Table and file index.
In the present embodiment, whether, for the limited time limit of storage file on server calculation document server, exist or delete thereby control these mapping relations described recent service time.File storage or while being downloaded server with corresponding digest value in current system time modification File Index Table the corresponding service time in the recent period of mapping relations with file index, wherein, the current system time is the current time of server.In File Index Table, exist the mapping relations of described digest value and file index, supporting paper server has been stored identical file, do not need this file of repeated storage, if increase or update server on File Index Table in the mapping relations of this digest value and file index.In the time that recent service time and current system mistiming exceed Preset Time, corresponding mapping relations in the file of deleted file server stores deleted file concordance list.Taking Preset Time as 1 year, after file is stored on file server with on January 1st, 2012 first, being sent out client in January 3 in 2012 forwards once and downloads, server is mapping relations January 3 in 2012 by increasing a recent service time that sends this file corresponding to client in File Index Table, if when follow-up this file is not sent client forwarding by other, only need to increase again corresponding mapping relations, and when accepting this file of client downloads, only need to be upgraded to current time the recent service time of corresponding mapping relations, if after transmission client transmits a document, do not have other to receive client downloads and cross this file, so to 3 o'clock January in 2013, the map record corresponding to digest value of this file in server meeting deleted file concordance list, and send message to file server make its delete storage file.Can effectively raise like this utilization factor of file server storage space.
Alternative dispensing means is after step S204, can also send described file index to receiving client, so that described reception client is downloaded described file according to described file index.
Concrete, described file index is the relevant information for storage file on log file server, it includes but not limited to storage directory, the file name of file, receive client and can obtain file from file server according to file index, simultaneously server revised file concordance list service time near-mid term.
Wherein, taking picture and social network services (Social Networking Services, SNS) server as the applicable scene of objectives object factory the present embodiment, be described as follows:
While sending client to picture, the user who sends client thinks that picture is more interesting, by sending client, this picture is forwarded in other contact persons or community, when SNS server receives the picture that sends client submission, use MD5 algorithm to generate the MD5 digest value of this picture, inquire about in the File Index Table of SNS server simultaneously and whether had the MD5 digest value of this picture and the mapping relations of file index, , if there are the MD5 digest value of this picture and the mapping relations of file index, on file server, store and the identical picture of picture that sends client submission, no longer storage sends the picture that client is submitted to, SNS server is as long as with the up-to-date service time in mapping relations corresponding to the MD5 digest value of this picture in the increase of current system time or updating file concordance list, file index is sent to and received the client that forwards picture by instant communication information simultaneously, these clients are according to file index download pictures from file server, even if this picture is forwarded repeatedly, SNS server only need to increase or upgrade corresponding mapping relations, and file server has only been stored a this picture.
The present embodiment, can reach the digest value of the file obtaining by comparative information digest algorithm, guarantees that on file server, same file is only stored portion, has improved the storage space utilization factor of file server, has improved the efficiency of file storage.
Embodiment tri-
Fig. 3 shows the concrete structure block diagram of the memory storage of the file that the embodiment of the present invention three provides, and for convenience of explanation, only shows the part relevant to the embodiment of the present invention.In the present embodiment, the memory storage of this file comprises: file receiving element 31, digest value acquiring unit 32, query unit 33, file storage unit 34, index increase unit 35 and index transmitting element 36.
Wherein, file receiving element 31, for receiving the file that sends client upload;
Digest value acquiring unit 32, for calculating the digest value of described file according to presupposed information digest algorithm;
Whether query unit 33, there are the mapping relations of described digest value and file index for file index table;
File storage unit 34, if there are not the mapping relations of described digest value and file index for File Index Table, sends described file to file server and stores, and receives the file index of the described file of described file server generation.
Further, described device also comprises:
Index increases unit 35, for increase the mapping relations of the file index of described digest value and described file at described File Index Table.
Further, described device also comprises:
Index transmitting element 36, for sending described file index to receiving client, so that described reception client is downloaded described file according to described file index.
The memory storage of the file that the embodiment of the present invention provides can be applied in the embodiment of the method one of aforementioned correspondence, and details, referring to the description of above-described embodiment one, do not repeat them here.
Embodiment tetra-
Fig. 4 shows the concrete structure block diagram of the memory storage of the file that the embodiment of the present invention four provides, and for convenience of explanation, only shows the part relevant to the embodiment of the present invention.In the present embodiment, the memory storage of this file comprises:
Wherein, file receiving element 41, for receiving the file that sends client upload;
Digest value acquiring unit 42, for calculating the digest value of described file according to presupposed information digest algorithm;
Whether query unit 43, there are the mapping relations of described digest value and file index for file index table;
File storage unit 44, if there are not the mapping relations of described digest value and file index for File Index Table, sends described file to file server and stores, and receives the file index of the described file of described file server generation.
Further, described device also comprises:
Index upgrade unit 45, if there are the mapping relations of described digest value and file index for File Index Table, does not store described file, upgrades the mapping relations of digest value described in described File Index Table and file index.
Further, described device also comprises:
Index increases unit 46, for increase the mapping relations of the file index of described digest value and described file at described File Index Table.
Further, described device also comprises:
Index transmitting element 47, for sending described file index to receiving client, so that described reception client is downloaded described file according to described file index.
The memory storage of the file that the embodiment of the present invention provides can be applied in the embodiment of the method two of aforementioned correspondence, and details, referring to the description of above-described embodiment two, do not repeat them here.
It should be noted that in said system embodiment, included unit is just divided according to function logic, but is not limited to above-mentioned division, as long as can realize corresponding function; In addition, the concrete title of each functional unit also, just for the ease of mutual differentiation, is not limited to protection scope of the present invention.
In addition, one of ordinary skill in the art will appreciate that all or part of step realizing in the various embodiments described above method is can carry out the hardware that instruction is relevant by program to complete, corresponding program can be stored in a computer read/write memory medium, described storage medium, as ROM/RAM, disk or CD etc.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a storage means for file, is characterized in that, described method comprises:
Receive the file that sends client upload;
Calculate the digest value of described file according to presupposed information digest algorithm;
In file index table, whether there are the mapping relations of described digest value and file index;
If there are not the mapping relations of described digest value and file index in File Index Table, send described file to file server and store, and receive the file index of the described file of described file server generation.
2. the method for claim 1, is characterized in that, described presupposed information digest algorithm comprises any of MD5, SHA-1 and hash algorithm.
3. the method for claim 1, is characterized in that, after whether there are the mapping relations of described digest value and file index, also comprises in described file index table:
If there are the mapping relations of described digest value and file index in File Index Table, do not store described file, upgrade the mapping relations of digest value described in described File Index Table and file index.
4. method as claimed in claim 1 or 2, is characterized in that, after the file index of the described file that the described file server of described reception generates, also comprises:
In described File Index Table, increase the mapping relations of the file index of described digest value and described file.
5. method as claimed in claim 4, is characterized in that, described method also comprises:
Send described file index to receiving client, so that described reception client is downloaded described file according to described file index.
6. a memory storage for file, is characterized in that, described device comprises:
File receiving element, for receiving the file that sends client upload;
Digest value acquiring unit, for calculating the digest value of described file according to presupposed information digest algorithm;
Whether query unit, there are the mapping relations of described digest value and file index for file index table;
File storage unit, if there are not the mapping relations of described digest value and file index for File Index Table, sends described file to file server and stores, and receives the file index of the described file of described file server generation.
7. device as claimed in claim 6, is characterized in that, described device also comprises:
Index upgrade unit, if there are the mapping relations of described digest value and file index for File Index Table, does not store described file, upgrades the mapping relations of digest value described in described File Index Table and file index.
8. device as claimed in claim 6, is characterized in that, described device also comprises:
Index increases unit, for increase the mapping relations of the file index of described digest value and described file at described File Index Table.
9. device as claimed in claim 8, is characterized in that, described device also comprises:
Index transmitting element, for sending described file index to receiving client, so that described reception client is downloaded described file according to described file index.
10. a server, is characterized in that, described server comprises the memory storage of the file as described in claim 6 to 9 any one.
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| CN105306537A (en) * | 2015-09-22 | 2016-02-03 | 浪潮(北京)电子信息产业有限公司 | Method for transmitting files of office automation (OA) system, server and client |
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| CN106599320A (en) * | 2016-12-30 | 2017-04-26 | 郑州云海信息技术有限公司 | File information abstract value calculation method and device |
| CN107656925A (en) * | 2016-07-24 | 2018-02-02 | 平安科技（深圳）有限公司 | The method and device that image file is had access to |
| CN109151059A (en) * | 2018-09-27 | 2019-01-04 | 乐蜜有限公司 | A kind of file uploading method, device, electronic equipment and storage medium |
| CN111506268A (en) * | 2020-04-17 | 2020-08-07 | 北京百度网讯科技有限公司 | Code file storage method and device and electronic equipment |
| CN112838981A (en) * | 2021-02-05 | 2021-05-25 | 西藏宁算科技集团有限公司 | Instant message processing method, device and system and electronic equipment |
| CN112953812A (en) * | 2021-01-29 | 2021-06-11 | 西藏宁算科技集团有限公司 | File message uploading and storing method and device thereof |
| CN113556580A (en) * | 2019-06-10 | 2021-10-26 | 西安万像电子科技有限公司 | Data transmission method and device |
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