CN110851440B - Data synchronization method and device - Google Patents
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- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/22—Indexing; Data structures therefor; Storage structures
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- G06F16/27—Replication, distribution or synchronisation of data between databases or within a distributed database system; Distributed database system architectures therefor
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- H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
- H04L9/3236—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials using cryptographic hash functions
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Abstract
The embodiment of the invention discloses a data synchronization method and a data synchronization device, wherein the method comprises the following steps: giving corresponding data ID to the data to be synchronized; setting a plurality of data groups according to the numerical range, and dividing the data ID into corresponding data groups; setting a hint value bound with a numerical range, wherein newly added data or original data of the data packet are changed, and the corresponding hint value is changed; transmitting the prompt value through the heartbeat packet, determining the position of the data to be synchronized according to the prompt value, and executing data synchronization. The apparatus is for performing the method. According to the embodiment of the invention, different data can be distinguished by giving the data ID, the data grouping is set according to the data range, the data ID is divided into the corresponding data grouping, the calculated amount of one-time data processing can be effectively reduced, and the hardware requirement of processing equipment is reduced; the synchronization of the data can be guided by determining the position of the data by the hint value.
Description
Technical Field
The invention relates to the data processing technology of the internet of things, in particular to a data synchronization method and device.
Background
The internet of things (The Internet of Things, IOT) refers to various devices and technologies such as various information sensors, radio frequency identification technology, global positioning system, infrared sensors, laser scanners, and the like.
The terminal of the internet of things, such as the cluster equipment, needs unified control, and data synchronization can occur to complete specific functions, however, the terminal equipment does not necessarily have complete data transmission and data processing functions, so that the data synchronization process needs to be reasonably arranged to reduce the dependence on hardware functions, and in addition, if the cluster equipment adopts conventional transmission instructions, the cluster equipment is easy to crack to cause the risk of intrusion.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the first aspect of the embodiment of the invention provides a data synchronization method, which improves the efficiency of data synchronization; a second aspect provides a data synchronization apparatus to perform a corresponding method.
According to an embodiment of the first aspect of the present invention, a data synchronization method includes: giving corresponding data ID to the data to be synchronized; setting a plurality of data groups according to the numerical range, and dividing the data ID into corresponding data groups; setting a hint value bound with a numerical range, wherein newly added data or original data of the data packet are changed, and the corresponding hint value is changed; transmitting the prompt value through the heartbeat packet, determining the position of the data to be synchronized according to the prompt value, and executing data synchronization.
The data synchronization method according to the embodiment of the invention comprises at least the following technical effects: different data can be distinguished by giving the data ID, data groups are set according to the data range, the data ID is divided into corresponding data groups, the calculated amount of primary data processing can be effectively reduced, and the hardware requirement of processing equipment is reduced; the synchronization of the data can be guided by determining the position of the data by the hint value.
A data synchronization method according to some embodiments of the present invention includes: detecting the change of the transmitted prompt value, determining the position of the data to be synchronized according to the prompt value and executing data synchronization. By means of the change of the indicator value, whether synchronization is needed or not can be determined, and compared with a forced synchronization mode, synchronization is not performed under the condition that data to be synchronized is unchanged, and synchronization efficiency is improved.
According to some embodiments of the invention, the hint value is set based on a hash algorithm. The Hash algorithm is a proper encryption algorithm, and is beneficial to improving the security of data transmission.
A data synchronization method according to some embodiments of the present invention includes: and giving corresponding data ID to each piece of data to be synchronized, and setting a data change table for each piece of data to be synchronized, wherein the data change table comprises marking bits for marking newly added data and original data change, and the original data change comprises digits of data content change and data deletion. The synchronization state can be tracked by the data change table.
According to some embodiments of the invention, the content of the heartbeat packet includes a hash value and a segmentation character for separating the different hash values. The size of the heartbeat packet can be reduced by dividing each hash value through the established dividing characters, and the requirements of a data transmission channel can be reduced.
According to an embodiment of the second aspect of the present invention, a data synchronization device includes: the marking module is used for giving corresponding data ID to the data to be synchronized; the grouping module is used for setting a plurality of data groups according to the numerical range, and dividing the data ID into corresponding data groups; the recording module is used for setting a hint value bound with the numerical range, and changing newly added data or original data of the data packet to change the corresponding hint value; and the synchronization module is used for transmitting the prompt value through the heartbeat packet, determining the position of the data to be synchronized according to the prompt value and executing data synchronization.
According to some embodiments of the invention, the synchronization module is further configured to detect a change of the transmitted hint value, determine a location of the data to be synchronized according to the hint value, and perform data synchronization.
According to some embodiments of the invention, the data synchronization device sets the hint value based on a hash algorithm.
According to some embodiments of the present invention, the marking module is configured to assign a corresponding data ID to each piece of data to be synchronized, and set a data change table for each piece of data to be synchronized, where the data change table includes marking bits for marking newly added data and original data change, and the original data change includes digits of data content change and data deletion.
According to some embodiments of the invention, the content of the heartbeat packet includes a hash value and a segmentation character.
Drawings
FIG. 1 is a flow chart of a data synchronization method according to an embodiment of the invention;
FIG. 2 is a flow chart of a data update to be synchronized according to an embodiment of the present invention;
FIG. 3 is a flow chart of heartbeat packet parsing in accordance with an embodiment of the present invention;
fig. 4 is a connection diagram of a data synchronization apparatus according to an embodiment of the present invention.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present scheme and are not to be construed as limiting the present scheme.
In the description of the present invention, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present invention can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
Example 1.
The data synchronization method of the embodiment of the present invention described with reference to fig. 1.
The data synchronization method comprises the following steps:
s1, giving corresponding data ID to the data to be synchronized;
s2, setting a plurality of data packets according to a numerical range, wherein the dividing data ID belongs to the corresponding data packet;
s3, setting a hint value bound with a numerical range, and changing newly added data or original data of the data packet to change the corresponding hint value;
s4, transmitting the prompt value through the heartbeat packet, determining the position of the data to be synchronized according to the prompt value, and executing data synchronization.
Specifically, the definition of the data to be synchronized is: and in the generalized data, the data structure body is formed by the original data processed by a certain modeling rule. The original data are data such as measured values output by the sensor, calculation results output by the chip and the like.
The data to be synchronized is assigned a data ID for distinguishing each piece of data to be synchronized. The value of the data ID is in a numerical range, and the numerical range can be set from 1W to 10W. If the whole numerical range is traversed according to the data ID, a large calculation load is caused on the processor, so that the traversing range can be reduced by dividing the data range into a plurality of data groups, and the load of the processor is reduced. Specific data packets can be 1-1K, 1K-2K 9W 9K-10W, i.e. each data packet has a value range of 1K, wherein W is ten thousand bits and K is kilobits.
The data ID is not necessarily assigned sequentially, and one reason for this is that the source of the data to be synchronized is not unique, and the source of one data to be synchronized is assigned with one data packet, which is beneficial to classifying the data of the same source and preventing the data from overflowing to cause abnormal data processing. For example, the data to be synchronized of the data source A belongs to the interval of 4K-5K, and the data to be synchronized of the data source B belongs to the interval of 6K-7K. Of course, other marking rules may be employed to assign the data ID. After completing the assignment of the data packet and the data ID, the data ID may be categorized as belonging to the section of the corresponding data packet. The purpose of the method is to provide a basis for identification for subsequent addressing, classifying and other operations.
Setting a hint value bound to a numerical range, that is, setting specific data (characters) to indicate whether data to be stored in the numerical range needs to be synchronized, wherein the specific situations that need to be synchronized include: the data packet has newly added data or original data changed, and the corresponding hint value is changed. And whether synchronization is needed or not is judged through the marking value, and compared with the normal condition, namely outputting a synchronization instruction, the data size is smaller, and the method is more suitable for data transmission of terminals with single functions in environments such as the Internet of things.
Heartbeat packet: the heartbeat packet is a self-defined command word which informs the opposite side of the state at regular time between the client and the server, and is transmitted at certain time intervals, which is similar to the heartbeat, so the heartbeat packet is called.
The hint value is transmitted by means of the heartbeat packet, so that the method is suitable for the terminal without strong data transmission capability to upload data. The method comprises the steps of determining the position of data to be synchronized according to a prompt value and executing data synchronization, namely, the prompt value can reflect whether the data to be synchronized needs to be synchronized or not, and meanwhile, as the prompt value is a bound value range, the concept of the value range comprises specific values of the value range and points to interfaces of data transmission of the data to be synchronized, namely, the corresponding data interfaces can be definitely determined according to the value range.
The data synchronization method according to the embodiment of the invention comprises at least the following technical effects: different data can be distinguished by giving the data ID, data groups are set according to the data range, the data ID is divided into corresponding data groups, the calculated amount of primary data processing can be effectively reduced, and the hardware requirement of processing equipment is reduced; the synchronization of the data can be guided by determining the position of the data by the hint value.
A data synchronization method according to some embodiments of the present invention includes: detecting the change of the transmitted prompt value, determining the position of the data to be synchronized according to the prompt value and executing data synchronization.
The normal terminal outputs some feedback data according to a certain rule and frequency, and the content of the feedback data can include the running state of the terminal, the data output by the terminal executing function, various instructions and the like. Obviously, if the feedback data does not need to be synchronized, the overall data transmission and data processing consumption can be reduced by not performing synchronization. The specific modes comprise: by means of the change of the hint value, whether synchronization is needed or not can be determined; compared with the traditional forced synchronization mode, the method can not execute synchronization under the condition that the data to be synchronized is unchanged, and is beneficial to improving the efficiency of synchronization.
According to some embodiments of the invention, the hint value is set based on a hash algorithm. hash: an arbitrary length input (also called pre-mapped pre-image) is transformed by a hashing algorithm into a fixed length output, which is the hash value. This conversion is a compressed mapping, i.e. the hash value is typically much smaller in space than the input, different inputs may be hashed to the same output, so it is not possible to determine a unique input value from the hash value. Simply stated, a function of compressing messages of arbitrary length to a message digest of a fixed length.
The specific process of setting the hint value may be: a unique hash value (e.g., 7219b9b60d9d70a9a7014369d88 ebef) is generated using a hash (current system timestamp) algorithm and the range of values is bound to the hash value. The hash algorithm is an encryption algorithm suitable for the terminal of the Internet of things, and is beneficial to improving the safety of data transmission.
A data synchronization method according to some embodiments of the present invention includes: and giving a corresponding data ID to each piece of data to be synchronized, and setting a data change table for each piece of data to be synchronized, wherein the data change table comprises a mark bit for marking newly added data (corresponding mark bit is add) and original data change, and the original data change comprises a data content change (corresponding mark bit is update) and a data deletion digit (corresponding mark bit is delete). The synchronization state can be tracked by the data change table.
Specifically, when a piece of data is newly added: and (3) adding a data table newly, generating an ID (namely a data ID), determining a hash value in the hash table according to the range of the ID, updating a corresponding hash value, adding a data change table newly, and marking the add bit of the data change table as 1.
When a piece of data is changed: modifying the data table record, determining a hash value in the hash table according to the range of the id, updating the corresponding hash value, modifying the data change table, and marking the update bit of the data change table as 1.
When deleting a piece of data: deleting the data table record, determining a hash value in the hash table according to the range of the id, updating the corresponding hash value, modifying the data change table, and marking the delete bit of the data change table as 1.
According to some embodiments of the invention, the content of the heartbeat packet includes a hash value and a segmentation character for separating the different hash values. I.e. the hash values are combined in "" partitions, and the heartbeat packet is used for transmission. The size of the heartbeat packet can be reduced by separating each hash value through the designated segmentation characters, and the requirements of a data transmission channel can be reduced.
The data update flow to be synchronized described with reference to fig. 2:
s21, inquiring a corresponding data ID range according to the value; s22, querying the data change table by using the data ID range (at this time, flag bit update=1, delete=1, add=1); s23, modifying the change state of the data change table (namely changing the mark bit from 1 to 0); s24, according to the data ID selected by the data change table, inquiring the corresponding data table (so as to determine the position of the data to be synchronized, namely the data interface).
The heartbeat packet parsing flow described with reference to fig. 3:
s31, splitting from the heartbeat packet to obtain a hash value; s32, judging whether the hash value changes; s33, determining synchronous configuration (including a data interface) of the data to be synchronized according to the hash value, and if not, performing synchronization.
Example 2.
A data synchronization device as described with reference to fig. 4, comprising: a marking module 1, configured to assign a corresponding data ID to the data to be synchronized; the grouping module 2 is used for setting a plurality of data groups according to the numerical range, and dividing the data ID into corresponding data groups; the recording module 3 is used for setting a hint value bound with a numerical range, and changing newly added data or original data of the data packet to change the corresponding hint value; and the synchronization module 4 is used for transmitting the prompt value through the heartbeat packet, determining the position of the data to be synchronized according to the prompt value and executing data synchronization.
According to some embodiments of the invention, the synchronization module is further configured to detect a change of the transmitted hint value, determine a location of the data to be synchronized according to the hint value, and perform data synchronization.
According to some embodiments of the invention, the data synchronization device sets the hint value based on a hash algorithm.
According to some embodiments of the present invention, the marking module is configured to assign a corresponding data ID to each piece of data to be synchronized, and set a data change table for each piece of data to be synchronized, where the data change table includes marking bits for marking newly added data and original data change, and the original data change includes digits of data content change and data deletion.
According to some embodiments of the invention, the content of the heartbeat packet includes a hash value and a segmentation character.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present invention.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit thereof, the scope of which is defined by the claims and their equivalents.
Claims (8)
1. A method of data synchronization, comprising:
giving corresponding data IDs to the data to be synchronized, and setting a data change table for each piece of data to be synchronized, wherein the data change table comprises marking bits for marking newly added data and original data change, and the original data change comprises digits of data content change and data deletion;
setting a plurality of data packets according to a numerical range, and dividing the data ID into corresponding data packets, wherein the data packets can be grouped according to the source of data to be synchronized;
setting a hint value bound with a numerical range, wherein newly added data or original data of the data packet are changed, and the corresponding hint value is changed;
and transmitting the prompt value through a heartbeat packet, determining the position of the data to be synchronized according to the prompt value, and executing data synchronization.
2. A method of data synchronization according to claim 1, comprising:
detecting the transmitted prompt value change, determining the position of the data to be synchronized according to the prompt value, and executing data synchronization.
3. A data synchronization method according to claim 1, characterized in that the hint value is set based on a hash algorithm.
4. A data synchronization method according to claim 2, characterized in that the content of the heartbeat packet comprises a hash value and a segmentation character for separating different hash values.
5. A data synchronization device, comprising:
the marking module is used for giving corresponding data ID of the data to be synchronized, and setting a data change table for each piece of data to be synchronized, wherein the data change table comprises marking bits for marking newly added data and original data change, and the original data change comprises digits of data content change and data deletion;
the grouping module is used for setting a plurality of data groups according to the numerical range, dividing the data ID into corresponding data groups, wherein the data groups can be grouped according to the source of the data to be synchronized;
the recording module is used for setting a hint value bound with the numerical range, and changing newly added data or original data of the data packet to change the corresponding hint value;
and the synchronization module is used for transmitting the prompt value through a heartbeat packet, determining the position of the data to be synchronized according to the prompt value and executing data synchronization.
6. The device according to claim 5, wherein the synchronization module is further configured to detect the change of the transmitted hint value, determine the location of the data to be synchronized based on the hint value, and perform data synchronization.
7. The data synchronization device of claim 5, wherein the hint value is set based on a hash algorithm.
8. The data synchronization device of claim 7, wherein the content of the heartbeat packet includes a hash value and a split character.
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