CN1852160A - Method for realizing data slow synchronization and system thereof - Google Patents
Method for realizing data slow synchronization and system thereof Download PDFInfo
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- CN1852160A CN1852160A CN 200510137436 CN200510137436A CN1852160A CN 1852160 A CN1852160 A CN 1852160A CN 200510137436 CN200510137436 CN 200510137436 CN 200510137436 A CN200510137436 A CN 200510137436A CN 1852160 A CN1852160 A CN 1852160A
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Abstract
The method includes steps: based on local data record, terminal device creates first condition code; and the first condition code and id of the said data record are sent to server; using the said id, server looks up local stored data record, and based on the record to create second condition code; comparing the first condition code with the second condition code; if the compared result is identical, then synchronous operation is ended; otherwise, data interaction are carried out between client end and server to complete synchronous operation. The invention also discloses a system of data synchronization. Using condition code, the method reduces transmission and exchange of repeated data records in slow synchronization greatly, as well as lowers consumption and transmission time of server.
Description
Technical field
The present invention relates to computer and communication technical field, relate in particular to slow synchronous implementation method and the system of a kind of data.
Background technology
Modern society is an information-intensive society, the user can carry out the reception and the transmission of information whenever and wherever possible, can be whenever and wherever possible with the application program in the handheld device actuating equipment, and the result of this data interaction and executive utility need store in the handheld device, also need with other data equipments in such data be consistent.For example, in mobile phone and PDA (Personal Digital Assistant, personal digital assistant) all preserves address list in, PC or notebook at office and family also all have identical address list, people wish that the information in these equipment can be consistent, when the data variation on one of them equipment, the data that can operate in other equipment are made corresponding change, data sync that Here it is.
The target of universal synchronous agreement is generally suitable, and two ends can be the network equipments of any type synchronously, and above the network, the data of simultaneous operation can be any network datas at any.Any mobile device comprises palmtop PC, PDA, mobile phone, automatic computing engine and desktop computer, and a user can be by different device accesses, the same data acquisition system of operation simultaneously.The SyncML synchronous protocol is exactly a new universal standard of arising at the historic moment in order to realize this target, it is initiated to set up by businessmans such as IBM, Lotus, Motorola, Nokia, Palm Inc tissue, and data sync forum tissue---SyncML initiation group is formulated, this agreement will develop into can be by the industry that the user accepts extensively a general synchronous protocol, since in December, 2000 SyncML 1.0 issues, there has been the company in nearly 700 family whole world to announce to support this agreement.
The SyncML synchronous protocol is a cover protocol suite, and it mainly comprises 4 parts: the transmission means of the frame structure of SyncML data sync agreement, SyncML synchronous protocol, SyncML presentation protocol, SyncML.Data flow in the conversation procedure of the main definition of data simultaneous operation of SyncML synchronous protocol, synchronous both sides' handshake procedure, data sync operation types or the like; The SyncML presentation protocol relates generally to data type, the command format of being supported synchronously, can be at the SyncML message format of diverse network transmission; SyncML message can be connected transmission at any wired with wireless network, having defined in the transmission of SyncML agreement binding can be based on HTTP (Hyper-Text Transfer Protocol, HTML (Hypertext Markup Language)), WSP (Wireless Session Portocol, WSP), OBEX (Object ExchangeProtocol, Object Exchange) network of three kinds of agreements connect to be gone up transmission syncML bag and message, and these three kinds of host-host protocols contain basically and covered all long-range and short distances and be connected.
In the SyncML synchronous protocol, defined the reciprocal process of message between SyncML client and SyncML server, Ding Yi data sync type comprises bi-directional synchronization simultaneously, client is initiated one-way synchronization, and server end initiation one-way synchronization reaches slowly synchronously, the server announcement is synchronous etc.Wherein, slow belong to a kind of in the bi-directional synchronization synchronously, in general bi-directional synchronization, client just sends to server to the own modification of being made in the synchronizing process in last time, and slow synchronously in, client then is that own all data are all issued server, and data that server relatively receives one by one and the data of oneself are to determine which data needs to upgrade.
The mutual situation of message when Figure 1 shows that SyncML client and SyncML server sync, the SyncML client sends and comprises the SyncML message of client data record modification information to the SyncML server, server carries out Synchronous Processing according to the data in the SyncML message to the data of self storing, and returns to the SyncML client revising results messages.
In existing slow simultaneous operation process, the data record that client sends is probably Already on the server, but client is not also known, the original data record that just exists of this server can only be sent to server once more, caused meaningless data traffic, especially under the very big situation of this data record, have the video that reaches K up to a hundred even go up M such as these data, this is very common in present wireless client, therefore cause prolong slow lock in time, give the bad experience of user.
In addition, the data record needs that server sends according to client are the section coupling word for word, and this is the operation that is quite time consuming with resource, has wasted a large amount of server resources.
Summary of the invention
The invention provides slow synchronous implementation method and the system of a kind of data, to solve the problem that must send identical data record, mate in the prior art and cause big data quantity and server to consume.
The invention provides following technical scheme:
The slow synchronous implementation method of a kind of data comprises the steps:
A, terminal equipment generate first condition code according to local data records, and the sign of this first condition code and described data record is sent to server;
B, the described sign of server by utilizing find local data record of preserving, and generate second condition code according to this record;
C, first condition code and second condition code are compared, if comparative result is identical, then finish simultaneous operation, if the comparative result difference, then client and server interaction data are finished simultaneous operation.
According to said method:
Utilize message digest algorithm to calculate described first condition code, second condition code.
Be designated local unique identification in the steps A; Preserve the mapping table of the corresponding relation of local unique identification and globally unique identifier in the described server, server finds corresponding globally unique identifier by described local unique identification, and utilizes this globally unique identifier to find corresponding data record.
Described first condition code is to desire data in synchronization record characteristic of correspondence sign indicating number on the client.
Further comprised before steps A: client is adjudicated the size of desiring the data in synchronization record, if surpass threshold value, then calculate the condition code and the execution in step A of this data record,, then directly this data record is sent to server and carry out simultaneous operation if do not surpass this threshold value.
In step B,, then directly carry out simultaneous operation if server does not find described local unique identification in mapping table.
In step C, server returns to client with comparative result, by client according to the comparative result corresponding operating of making a strategic decision.
A kind of server comprises:
Be used to store data record with sign, and the memory module of storing mapping relations between client data record identification and the local data records sign;
Be used for sending the enquiry module that the data record sign finds local data record of preserving according to client device;
Be used for according to the data that find generate second condition code and with first condition code processing module relatively;
Be used for determining that in processing module second condition code and first condition code do not carry out the synchronization module of data sync simultaneously with client.
A kind of data synchronous system comprises:
Be used for generating first condition code, and send the client device of this first condition code and described data record sign according to local data records;
Be used to utilize client device to send the data record sign and find local data record of preserving, generate second condition code according to this record, and first condition code and second condition code compared, and do not finish the server of simultaneous operation simultaneously with described client device interaction data at comparative result.
Beneficial effect of the present invention is as follows:
The present invention has significantly reduced the transmission and the exchange of slow synchronously middle repeating data record, and cost only has been to use the very little summary of data volume, i.e. condition code.In addition, client sends to server with condition code, and server only needs this condition code is mated, and does not need field record coupling one by one, has significantly reduced the consumption and the delivery time of server.
Description of drawings
Fig. 1 is an information interaction schematic diagram between client and the server in the prior art;
Fig. 2 is the structural representation of synchro system in the embodiment of the invention;
Fig. 3 is the basic structure schematic diagram of SyncML bag in the embodiment of the invention;
Fig. 4 realizes the slow synchronous flow chart of data in the embodiment of the invention;
Fig. 5 is the structural representation of the synchronization server in the embodiment of the invention.
Embodiment
The present invention mainly is applicable to the slow method of synchronization in the SyncML standard, sees also Fig. 1, Fig. 1 frame of broken lines internal representation be the SyncML frame structure that the SyncML standard is discussed, the frame of broken lines outside is the data sync agreement.The SyncML framework is made up of SyncML data format, SyncML adapter and SyncML functional interface three parts.
Use A among Fig. 2 and represent a network service, can to carry out data sync mutual with some application on other network equipments (referring to application B in this figure).The data sync operate services of using A and using between the B can utilize common networks such as http protocol, WSP agreement, OBEX agreement to connect.
Synchronization engine is in charge of the operation of whole synchrodata, and the data sync operation of using A is in charge of the whole operation process based on the data sync agreement by synchronization engine.
Synchronous service proxy management synchronization engine is to the visit of network, and the mutual communication process of data sync is carried out in the application of administrative client and server.Synchronous service agency is by calling the SyncML interface or the function on this interface is finished these functions.
The SyncML interface is the application programming interfaces towards the SyncML adapter.
The SyncML adapter is responsible for the transmitting-receiving process of message, and receiving-transmitting sides intercoms mutually in this process, transmitting-receiving SyncML format file.The network that the SyncML adapter is responsible between establishment and maintenance application A and the application B simultaneously connects.
By calling the function of SyncML interface, use B with a synchronization client agent accesses network and its SyncML adapter.
According to said frame, wherein:
SyncML client: be meant the equipment that has comprised synchronization client agent and at first the data record of its modification has been issued server, and client must be able to receive the response message from the SyncML server.Although always the SyncML client sends earlier and revises data record, under certain conditions, server end is also wanted to initiate synchronizing process.The SyncML client can be mobile phone, PC or PDA equipment usually.
SyncML server: be meant the equipment that has comprised synchronous service agency and synchronization engine, usually will wait for that SyncML client initiation synchronizing process and the data record that client is revised send to server, server is responsible for receiving the modification data record of client and analyzing synchronously.If in the order of transport layer back-level server end, the SyncML server also can initiatively be initiated synchronizing process, and general server equipment or PC can become the SyncML server.
The SyncML presentation protocol has defined the form that is used for message transmitted between the data sync operation entity, this protocol definition the Doctype of an XML (Document Type Description is described, DTD), in this DTD definition all in the data sync operation expression mode of desired data, SyncML message must meet the DTD explanation, so that increase at client and server, delete, change the mutual of operation information and result phase information, in agreement, defined the describing method of device capability information (storage capacity etc.) and various metamessage (such as secure authenticated information) simultaneously.
See also Fig. 3, in concept, the basic structure of the SyncML bag of SyncML presentation protocol definition is the container of various synchronization messages, and SyncML message is not only an independent entity, also is an XML document that form is good.A SyncML bag can comprise the complete SyncML message of one or more form, is used for the operation of client and server data sync.Then can comprise one or more synch command for a SyncML message, the SyncML synchronization message is made up of following two parts:
Message header: in the SyncML message header, contain routing iinformation, version information, the authentication information of message, session information or the like, the explanation of SyncML message header SyncHdr element.
Message body: comprise one or more SyncML order SyncML message body, also comprising needs data in synchronization, and SyncML message body is by the explanation of SyncBody element.
Each SyncML order can comprise the execution details of a plurality of element types with explanation SyncML order by single SyncML element type explanation, and these detailed information comprise needs data in synchronization, metamessage or the like.The SyncML order can be divided into message request order and response message order, and wherein the message request order comprises Add, Alert, Atomic, Delete, Get, Map, Put, Sequence, Sync; The response message order comprises Status, Results.Wherein some order can comprise the other order.For example: be used for just comprising some other order that can change the data additions and deletions in the Sync order that synchronized relation is set up in the set of two data, some order can also can be in its outside in the inside of Sync order, picture Delete order must be in the inside of Sync, and the Put order then must be in the outside of Sync.
More than summarize with regard to syncml simultaneous techniques and framework, the slow synchronous implementation method of data provided by the present invention is exactly based on this.
Since in the past all to be client slowly synchronously all issue server desiring data in synchronization, server compares the data that receive and the data of self one by one, to determine which data needs to upgrade.And the present invention has adopted the summary technology, promptly utilized the MD5 algorithm, full name is md5-challenge (Message-Digestalgorithm 5), this algorithm is that data message is carried out one 128 condition code obtaining after the mathematic(al) manipulation, this condition code has 2 big characteristics: at first, this condition code is irreversible; Secondly, this condition code has the discreteness of height, the little by little change of former data message will cause its condition code that calculates through MD5 that huge variation is arranged, difference is very big, between without any relation, condition code has 128, is very low so arbitrary data information has the probability of the same signature, and it is impossible to be considered as usually.
The condition code characteristic that gets based on above-mentioned MD5 calculating, the present invention is loaded with MD5 algorithm mechanism at client and server, can calculate its condition code to arbitrary data.
Simultaneous operation is based on that in the client and server each data record is all carried out the principle that a unique identification (ID) should be arranged.Client id be called as local unique identification (Locally UniqueInDentifier, LUID), server ID is called as globally unique identifier (Globally UniqueInDentifier, GUID; The figure place of globally unique identifier is much larger than local unique identification.), server is preserved the mapping table of the corresponding relation of LUID and GUID, when carrying out synchronously at every turn, all include LUID in the SyncML bag that client sends, this LUID is convenient to server and searches GUID in mapping table, know data record that client sends concrete any bar data record then, so that carry out the synchronous renewal of data record corresponding to this ground of server.
Illustrate that below in conjunction with Fig. 4 the present invention adopts the summary technology to carry out slow synchronous process:
Step 100: client and server interaction initialization data, beginning is synchronously slow;
Step 200: client obtains desiring first condition code that data in synchronization writes down according to the MD5 algorithm, and the LUID of this condition code and described data record correspondence is sent to server;
Step 300: server searches whether there is this LUID in the MAP of this locality mapping table, if do not have, and then direct execution in step 700, if having, then execution in step 400;
Step 400: server finds the GUID corresponding with this LUID in the MAP mapping table;
Step 500: read the local corresponding data record of server according to this GUID, and obtain second condition code according to the MD5 algorithm;
Step 600: server compares first condition code and second condition code, if comparative result is identical, then finishes simultaneous operation, if the comparative result difference then returns to client with the result, and execution in step 700;
Step 700: client sends the data record of described LUID correspondence to server, server update local data records and with execution result with desire the data in synchronization record and issue to client, and client is new data records more, and simultaneous operation is finished.
In above-mentioned synchronizing process, the corresponding LUID of the data record on the client, for example, the phone directory in the mobile phone has some phones, and a phone directory recording is arranged at present, and LUID is 3, and data record is:
BEGIN：VCARD
VERSION：2.1
FN：Bruce?Smith
N：Smith；Bruce
TEL；WORK；VOICE：+1-919-555-1234
TEL；WORK；FAX：+1-919-555-9876
NOTE：here?starts?a?huge?note?field，or?icon?etc...
The data of supposing the NOTE item are very big, also have a lot of data behind the ellipsis, then adopt the MD5 digest algorithm to calculate the condition code of record data this moment, be dealt into server then and get on matching ratio, if the comparative result that returns is identical, then just can not send this LUID be 3 data record to client desynchronizes to the server and upgraded, and saved time and resource thus greatly.If directly send this data record to server, because it is very big that this data record takes up space, transmission needs the longer time, and, after transmission is finished also will with corresponding data record on the server one by one field carry out matching ratio, so more taken the resource of server.
Consider and have some smaller data record, it is carried out MD5 calculates time of condition code and resource overhead and is greater than and this data record directly is sent to server carries out spent time and expense synchronously, thereby, the present invention is provided with a threshold value in client, just the data record to client defines a thresholding, further comprised before above-mentioned steps 200: client is adjudicated the size of desiring the data in synchronization record, if surpass threshold value, then calculate the condition code and the execution in step 200 of this data record, if do not surpass this threshold value, then directly this data record sent to server execution in step 700.The concrete size of threshold value need be set according to concrete system and other factors.
Accordingly, a kind of structure of data synchronization server comprises as shown in Figure 5 in the present embodiment: memory module, enquiry module, processing module and synchronization module; Wherein:
Memory module is used to store the data record with sign, and the mapping relations between storage client data record identification and the server local data records sign.
Enquiry module is used for sending the data record sign according to client device and finds local data record of preserving from described memory module.
Processing module is used for generating second condition code according to the data that find, and whether will compare second condition code identical with first condition code.
Synchronization module is used for carrying out data sync with client in second condition code and first condition code not simultaneously.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (9)
1, the slow synchronous implementation method of a kind of data is characterized in that, comprises the steps:
A, client generate first condition code according to local data records, and the sign of this first condition code and described data record is sent to server;
B, the described sign of server by utilizing find local data record of preserving, and generate second condition code according to this record;
C, first condition code and second condition code are compared, if comparative result is identical, then finish simultaneous operation, if the comparative result difference, then client and server interaction data are finished simultaneous operation.
2, the slow synchronous implementation method of data as claimed in claim 1 is characterized in that, utilizes message digest algorithm to calculate described first condition code and second condition code.
3, the slow synchronous implementation method of data as claimed in claim 1 is characterized in that, is designated local unique identification in the steps A; Preserve the mapping table of the corresponding relation of local unique identification and globally unique identifier in the described server, server finds corresponding globally unique identifier by described local unique identification, and utilizes this globally unique identifier to find corresponding data record.
4, the slow synchronous implementation method of data as claimed in claim 1, it is characterized in that, further comprised before steps A: client is adjudicated the size of desiring the data in synchronization record, if surpass threshold value, then calculate the condition code and the execution in step A of this data record, if do not surpass this threshold value, then directly this data record sent to server and carry out simultaneous operation.
5, the slow synchronous implementation method of data as claimed in claim 1 is characterized in that, in step B, if server does not find described sign in mapping table, then directly carries out simultaneous operation.
7, the slow synchronous implementation method of data as claimed in claim 1 is characterized in that in step C, server returns to client with comparative result, by client according to the comparative result corresponding operating of making a strategic decision.
8, a kind of server is characterized in that, comprising:
Be used to store data record with sign, and the memory module of storing mapping relations between client data record identification and the local data records sign;
Be used for sending the enquiry module that the data record sign finds local data record of preserving according to client device;
Be used for according to the data that find generate second condition code and with first condition code processing module relatively;
Be used for determining that in processing module second condition code and first condition code do not carry out the synchronization module of data sync simultaneously with client.
9, a kind of data synchronous system is characterized in that, comprising:
Be used for generating first condition code, and send the client device of this first condition code and described data record sign according to local data records;
Be used to utilize client device to send the data record sign and find local data record of preserving, generate second condition code according to this record, and first condition code and second condition code compared, and do not finish the server of simultaneous operation simultaneously with described client device interaction data at comparative result.
10, data synchronous system as claimed in claim 9 is characterized in that, described server comprises:
Be used to store data record with sign, and the memory module of storing mapping relations between client data record identification and the local data records sign;
Be used for sending the data record sign finds local data record of preserving from described memory module enquiry module according to client device;
Be used for according to the data that find generate second condition code and with first condition code processing module relatively;
Be used for determining that in processing module second condition code and first condition code do not carry out the synchronization module of data sync simultaneously with client.
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| CN101094230B (en) * | 2007-07-09 | 2010-07-28 | 杭州华三通信技术有限公司 | Method and device for generating state table of feature codes, matched feature codes |
| CN101420446B (en) * | 2008-08-21 | 2011-09-14 | 上海自动化仪表股份有限公司 | Signal source information sharing method in distributed network |
| CN102968589A (en) * | 2012-11-14 | 2013-03-13 | 北京奇虎科技有限公司 | Method and device for identifying safety attributes of application procedure |
| CN103237075A (en) * | 2013-04-24 | 2013-08-07 | 广州市动景计算机科技有限公司 | Data synchronizing method, device and system |
| CN103428264A (en) * | 2013-06-27 | 2013-12-04 | 华为软件技术有限公司 | Data synchronization method, device and system |
| CN103501260A (en) * | 2013-09-12 | 2014-01-08 | 北京创毅讯联科技股份有限公司 | Network configuration method and access device of enterprise network |
| CN106453019A (en) * | 2016-09-12 | 2017-02-22 | 青岛海尔空调电子有限公司 | Communication method of multiple online internal and external machines |
| CN108243408A (en) * | 2016-12-27 | 2018-07-03 | 乐视汽车（北京）有限公司 | Method, vehicle device, communication system and the automobile synchronized for address list |
| CN110018875A (en) * | 2019-04-10 | 2019-07-16 | 北京云创世联科技股份有限公司 | A kind of desktop synchronization realizing method based on IDV |
| CN107948220B (en) * | 2016-10-12 | 2021-01-08 | 百度在线网络技术（北京）有限公司 | Method and device for synchronizing address book cloud service |
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| CN101094230B (en) * | 2007-07-09 | 2010-07-28 | 杭州华三通信技术有限公司 | Method and device for generating state table of feature codes, matched feature codes |
| CN101420446B (en) * | 2008-08-21 | 2011-09-14 | 上海自动化仪表股份有限公司 | Signal source information sharing method in distributed network |
| CN102968589B (en) * | 2012-11-14 | 2015-09-23 | 北京奇虎科技有限公司 | A kind of recognition methods of application security attribute and device |
| CN102968589A (en) * | 2012-11-14 | 2013-03-13 | 北京奇虎科技有限公司 | Method and device for identifying safety attributes of application procedure |
| CN103237075A (en) * | 2013-04-24 | 2013-08-07 | 广州市动景计算机科技有限公司 | Data synchronizing method, device and system |
| CN103237075B (en) * | 2013-04-24 | 2016-07-06 | 广州市动景计算机科技有限公司 | A kind of method of data synchronization, Apparatus and system |
| CN103428264A (en) * | 2013-06-27 | 2013-12-04 | 华为软件技术有限公司 | Data synchronization method, device and system |
| CN103428264B (en) * | 2013-06-27 | 2016-12-28 | 华为软件技术有限公司 | The method of data syn-chronization, equipment and system |
| CN103501260A (en) * | 2013-09-12 | 2014-01-08 | 北京创毅讯联科技股份有限公司 | Network configuration method and access device of enterprise network |
| CN103501260B (en) * | 2013-09-12 | 2017-03-08 | 北京创毅讯联科技股份有限公司 | The network collocating method of enterprise network and access device |
| CN106453019A (en) * | 2016-09-12 | 2017-02-22 | 青岛海尔空调电子有限公司 | Communication method of multiple online internal and external machines |
| CN107948220B (en) * | 2016-10-12 | 2021-01-08 | 百度在线网络技术（北京）有限公司 | Method and device for synchronizing address book cloud service |
| CN108243408A (en) * | 2016-12-27 | 2018-07-03 | 乐视汽车（北京）有限公司 | Method, vehicle device, communication system and the automobile synchronized for address list |
| CN110018875A (en) * | 2019-04-10 | 2019-07-16 | 北京云创世联科技股份有限公司 | A kind of desktop synchronization realizing method based on IDV |
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