CN109766462A - Image file read method, apparatus and system in transmission line of electricity monitoring system - Google Patents
Image file read method, apparatus and system in transmission line of electricity monitoring system Download PDFInfo
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Abstract
This application discloses the image file read methods in a kind of transmission line of electricity monitoring system, comprising: a memory node in transmission line of electricity distributed system receives the image reading request message from server；Wherein, memory node includes storage hard disk and caching system；Storage hard disk is used to cache the record information for reading image file for storing image file, caching system；Caching system includes the first memory block and the second memory block, first memory block is used for the storage corresponding with the timestamp of image file is read of the mark of image file, the content storage corresponding with respective image file identification of image file in the storage hard disk that the second memory block is used to read；Memory node returns to respective image file according to image reading request message, to server, and creates the record information of respective image file in the second memory block or update the record information of respective image file.The application can be improved the reading speed of image data.
Description
Technical field
This application involves the image file reading sides in reading data field more particularly to a kind of transmission line of electricity monitoring system
Method, apparatus and system.
Background technique
Current transmission line of electricity monitoring system mostly uses greatly static image to carry out line conditions judgement, to possibility or has occurred and that
Abnormal phenomenon scene, take pictures and saving scene image document.
Image data passes to after monitoring backstage, is stored to memory node, operation maintenance personnel is checked each defeated by monitor supervision platform
The live image of electric line.
Operation maintenance personnel needs directly acquire image document from memory node, however the picture of monitoring system shooting would generally
Biggish memory space is occupied, operation maintenance personnel needs directly acquire image document from memory node and will increase the magnetic of memory node
Disk accesses pressure, to reduce the reading speed of image data.
Summary of the invention
To solve the above-mentioned problems, in a first aspect, present applicant proposes the image texts in a kind of transmission line of electricity monitoring system
Part read method, comprising:
A memory node in transmission line of electricity distributed system receives the image reading request message from server, institute
State image reading request message, comprising: the mark of target storage node mark and image file；
Wherein, the memory node includes storage hard disk and caching system；The storage hard disk is used to store image file,
The caching system is used to cache the record information for reading described image file；The caching system includes the first memory block and the
Two memory blocks, first memory block are used for that the timestamp of described image file to be corresponding deposits with reading by the mark of image file
It stores up, the content and respective image file identification pair of image file in the storage hard disk that second memory block is used to read
It should store；
For the memory node according to described image read requests message, Xiang Suoshu server returns to respective image file, and
The record information of respective image file is created in second memory block or updates the record information of respective image file.
In one example, the memory node is identified according to the image file in described image read requests message, really
Described image file identification whether is stored in the fixed caching system；
In the case where being stored with described image file identification in the caching system, the caching system is according to described
The corresponding relationship of image file mark and content of image files in two memory blocks, by the respective image in second memory block
File content returns to the server, and updates the timestamp of the reading described image file in first memory block.
In one example, the memory node is identified according to the image file in described image read requests message, really
Described image file identification whether is stored in the fixed caching system；
In the caching system in the case where not stored described image file identification, the memory node is in the storage
Content of image files corresponding with described image file identification is inquired in hard disk, and returns to described image file to the server
Content；And corresponding store to described first of the timestamp of described image file identification and reading described image file is stored
Area, and described image file identification and described image file content correspondence are stored to second memory block.
In one example, the memory node is according to the timestamp in preset time and first memory block, really
Determine storage time and be more than the image file of the preset time, and deletes first memory block, described in the second memory block
Storage time be more than preset time image file relevant information, wherein described image relevant information include image file mark,
Content of image files, the timestamp for reading image file.
In one example, the memory node is in the figure for detecting first memory block or the storage of the second memory block
When reaching preset quantity as the quantity of file identification,
According to the timestamp for reading image file in first memory block, deletes first be stored in described delay sequentially in time
The image file relevant information of deposit system, wherein described image relevant information include image file mark, content of image files,
Read the timestamp of image file.
In one example, first memory block or second memory block are stored with the reading to respective image file
Take number；
The memory node is detecting the image file mark of first memory block or the storage of the second memory block
When quantity reaches preset quantity, Delete query number is less than preset times and is stored in the caching system sequentially in time
The relevant information of time longest image file, wherein described image relevant information includes that image file identifies, in image file
Hold, the timestamp of reading image file, the number for reading image file.
In one example, the server receives the image file acquisition message for carrying out self terminal, and described image file obtains
Taking message includes at least one of following image file information: image file name, image file keyword, image file mark；
The server determines the corresponding memory node mark of described image file and figure according at least one of described image file information
As the mark of file；Wherein, the corresponding storage image file information of the server and memory node identify.
In one example, the server obtains each in multiple memory nodes in the transmission line of electricity distributed system
The quantity of the image file mark stored in the caching system of memory node；And the image file mark stored in having caching system
When knowing quantity more than the first amount threshold, target storage node is determined；The target storage node is the figure of caching system storage
As file identification quantity is no more than the memory node of the second amount threshold；
It is more than the parts of images text in the caching system of the first amount threshold that image file is identified quantity by the server
Part information is stored into the caching system of the target storage node.
Second aspect, the embodiment of the present application provide the image file reading device in a kind of transmission line of electricity monitoring system,
It include: receiving unit, storage unit, cache unit and data processing unit；
The receiving unit receives the figure from server for a memory node in transmission line of electricity distributed system
As read requests message, described image read requests message, comprising: the mark of memory node mark and image file；
The storage unit is for storing image file；
The cache unit is used to cache the record information for reading described image file；The cache unit is deposited including first
Storage area and the second memory block, first memory block are used for the timestamp of the mark of image file and reading described image file
It is corresponding to store, the content and respective image file of image file in the storage hard disk that second memory block is used to read
The corresponding storage of mark；
For the data processing unit according to described image read requests message, Xiang Suoshu server returns to respective image text
Part, and create the record information of respective image file in second memory block or update the record letter of respective image file
Breath.
The third aspect, the embodiment of the present application provide the image file in a kind of transmission line of electricity monitoring system and read system,
It is characterised by comprising: memory node described in server and at least one first aspect.
It is proposed that the image file read method in a kind of transmission line of electricity monitoring system can bring and have as follows by the application
Beneficial effect:
1. utilize caching system storage section image file, when receiving request, enable a part of image file from
It is called directly in caching system, to mitigate the read-write pressure of storage hard disk；
2. caching system is divided into two part storage image file relevant informations, it persistently will be in the first storage region
Content is ranked up, to reduce the resource that memory node is occupied when arranging and storing image file relevant information.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present application, constitutes part of this application, this Shen
Illustrative embodiments and their description please are not constituted an undue limitation on the present application for explaining the application.In the accompanying drawings:
Fig. 1 is the image file read method process in a kind of transmission line of electricity monitoring system provided by the embodiments of the present application
Figure；
Fig. 2 is the structure of the image file reading device in a kind of transmission line of electricity monitoring system provided by the embodiments of the present application
Schematic diagram；
Fig. 3 is the structure of the image file reading system in a kind of transmission line of electricity monitoring system provided by the embodiments of the present application
Schematic diagram.
Specific embodiment
For the clearer general idea for illustrating the application, carry out in an illustrative manner with reference to the accompanying drawings of the specification detailed
It describes in detail bright.
Embodiments herein discloses the image file read method in a kind of transmission line of electricity monitoring system, such as Fig. 1 institute
Show, comprising the following steps:
Step 101, a memory node in transmission line of electricity distributed system receives the image reading from server and asks
Seek message.
In the embodiment of the present application, image reading request message, comprising: the mark of target storage node mark and image file
Know.Server elder generation recipient receives the image file acquisition message for carrying out self terminal, and image file obtains message and includes but is not limited to
Any one or more image file information below: image file name, image file keyword, image file mark.Service
Device determines the mark of image file corresponding target storage node mark and image file according to image file information；Wherein, it takes
Being engaged in, device is corresponding to store image file information and target storage node mark.
Memory node includes storage hard disk and caching system；For storing image file, caching system is used for storage hard disk
Caching reads the record information of image file；Caching system includes the first memory block and the second memory block, and the first memory block is used for
According to the mark for the time relationship storage image file for reading the image file in storage hard disk and corresponding timestamp, such as text
Part title and read access time.Second memory block is for the corresponding content for storing the image file in reading storage hard disk and accordingly
The mark of image file.
Step 102, memory node is identified according to the image file in image reading request message, and determining in caching system is
It is no to be stored with image file mark, if so, step 105 is executed, it is no to then follow the steps 103.
Step 103, memory node inquires content of image files corresponding with image file mark in storage hard disk, and to
Server returns to content of image files.
It in the embodiment of the present application, will be corresponding as file identification after memory node verifying target storage node mark is correct
Content of image files return to server.For the image file not having in caching system, memory node is from storage hard disk
Corresponding image file is read, and returns to server.
Step 104, the timestamp correspondence that image file is identified and read image file by memory node is stored to first
Memory block, and image file is identified into store to second memory block corresponding with content of image files.
Since the memory capacity of caching system is limited, when the memory capacity of caching system reaches maximum value, need
The partial document in caching is deleted, in order to continue to store alternative document.Therefore, in the embodiment of the present application, record reads figure
As the timestamp of file, when memory node is detecting the image file mark of the first memory block or the storage of the second memory block
When quantity reaches preset quantity, according to the timestamp for reading image file in the first memory block, deletes first deposit sequentially in time
Enter the image file relevant information of caching system, wherein photographed image-related information includes but is not limited to image file mark, image text
Part content, the timestamp for reading image file.Later, memory node again by image file identify and read image file when
Between stab correspondence and store to the first memory block, and image file mark corresponding with content of image files is stored to the second memory block.
However, some image files are important, need frequently to be transferred.These files should be stayed in as far as possible slow
In deposit system, to reduce the read-write pressure of hard disk.Therefore, in another embodiment of the application, memory node is detecting
When the quantity of the image file mark of one memory block or the storage of the second memory block reaches preset quantity, delete sequentially in time
Inquiry times are less than preset times and are stored in the relevant information of the longest image file of time in caching system, important to guarantee
Image file store as far as possible in the buffer.
For example, the storage time of file A, B, C there are three in caching system, file A and file B are two days, file C's
Storage time is 1 day, and the inquiry times of three files are 20 times, 10 times, 9 times respectively.Although when the storage of file A and file B
Between be the same, but the inquiry times of file A are relatively more, therefore importance is some higher.In order to stay in file A as much as possible
In caching system, need to delete file B.
The image file for relying solely on time sequencing and inquiry times to clear up in caching system will lead to some history and look into
It is many to ask number, but the few image file of current accessed number is stored on caching system, to reduce file reading efficiency.
For example, the storage time of file A, B there are two in caching system, file A and file B are two days, the inquiry time of two files
Number is 20 times, 10 times respectively.But 20 times of file A inquiries occur to be stored to first day of caching system in file A, and file B
10 inquiries have 9 times and occur in file B to be stored to second day of caching system, this explanation is not so good as relative to current time file A
File B is important, but according to the method in above-described embodiment, memory node still will be deleted file B.
To solve the above-mentioned problems, in another embodiment of the application, memory node also can according to preset time and
Timestamp in first memory block determines that storage time is more than the image file of preset time, and deletes the first memory block, second
Storage time in memory block is more than the image file relevant information of preset time, and such memory node will access history secondary
The more file of number is deleted, to guarantee the timeliness of data in caching system.
Step 105, memory node is closed according to the image file mark in the second memory block is corresponding with content of image files
Respective image file content in second memory block is returned to server, and updates the reading figure in the first memory block by system
As the timestamp of file.
In the embodiment of the present application, record read image file timestamp, convenient for memory node delete the first memory block,
Storage time in second memory block is more than the image file relevant information of preset time.
In addition, the simple image file quantity by memory node adjusting caching system cannot expire in heavy traffic
The operational demand of foot, needs that the image file relevant information on memory node is dumped to other storages by server at this time
On node.Therefore, in the embodiment of the present application, server obtains each in multiple memory nodes in transmission line of electricity distributed system
The quantity of the image file mark stored in the caching system of memory node；And the image file mark stored in having caching system
When knowing quantity more than the first amount threshold, target storage node is determined；Target storage node is the image text of caching system storage
Part identifies the memory node that quantity is no more than the second amount threshold；Image file mark quantity is more than the first quantity threshold by server
Parts of images the file information in the caching system of value is stored into the caching system of target storage node.
Specifically, server corresponds to memory node A, memory node B, memory node C, the caching system of three memory nodes
The quantity of documents of storage in system, i.e. image file identify quantity, respectively 11,6 and 1.Wherein, first threshold is
10, second threshold 5.At this point, the image file quantity in memory node A is greater than first threshold, server determines memory node C
Target storage node, and by most 4 image file informations in the caching system of memory node A, storage arrives memory node C's
In caching system, it can not only guarantee that the image file quantity in the caching system of memory node A is not more than 10 in this way, but also can protect
It demonstrate,proves image file quantity in the caching system of memory node C and is not more than 5.
As shown in Fig. 2, the image file reading device in a kind of transmission line of electricity monitoring system provided by the embodiments of the present application,
It include: receiving unit 201, storage unit 202, cache unit 203 and data processing unit 204.
Receiving unit 201 receives the image from server for a memory node in transmission line of electricity distributed system
Read requests message, image reading request message, comprising: the mark of memory node mark and image file；
Storage unit 202 is for storing image file；
Cache unit 203 is used to cache the record information for reading image file；Cache unit includes the first memory block and the
Two memory blocks, the first memory block are used for the mark according to the time relationship storage image file for reading the image file in storage hard disk
Knowledge and corresponding timestamp, the second memory block is for the corresponding content for storing the image file in reading storage hard disk and accordingly
The mark of image file；
Data processing unit 204 returns to respective image file according to image reading request message, to server, and second
Memory block is newly-built or updates the record for reading image file.
As shown in figure 3, the image file in a kind of transmission line of electricity monitoring system provided by the embodiments of the present application reads system,
It include: memory node 302 described in server 301 and at least one above-described embodiment.
All the embodiments in this specification are described in a progressive manner, same and similar portion between each embodiment
Dividing may refer to each other, and each embodiment focuses on the differences from other embodiments.Especially for system reality
For applying example, since it is substantially similar to the method embodiment, so being described relatively simple, related place is referring to embodiment of the method
Part explanation.
The above description is only an example of the present application, is not intended to limit this application.For those skilled in the art
For, various changes and changes are possible in this application.All any modifications made within the spirit and principles of the present application are equal
Replacement, improvement etc., should be included within the scope of the claims of this application.
Claims (10)
1. the image file read method in a kind of transmission line of electricity monitoring system characterized by comprising
A memory node in transmission line of electricity distributed system receives the image reading request message from server, the figure
As read requests message, comprising: the mark of target storage node mark and image file；
Wherein, the memory node includes storage hard disk and caching system；The storage hard disk is described for storing image file
Caching system is used to cache the record information for reading described image file；The caching system includes that the first memory block and second is deposited
Storage area, first memory block are used for the storage corresponding with the timestamp of described image file is read of the mark of image file, institute
The second memory block is stated for the content of image file in the storage hard disk read is corresponding with respective image file identification
Storage；
The memory node returns to respective image file according to described image read requests message, Xiang Suoshu server, and in institute
The second memory block is stated to create the record information of respective image file or update the record information of respective image file.
2. the method according to claim 1, wherein the memory node disappears according to described image read requests
Breath, Xiang Suoshu server returns to respective image file, and updates the record information of respective image file in second memory block,
Specifically:
The memory node is identified according to the image file in described image read requests message, and determining in the caching system is
It is no to be stored with described image file identification；
In the case where being stored with described image file identification in the caching system, the caching system is deposited according to described second
The corresponding relationship of image file mark and content of image files in storage area, by the respective image file in second memory block
Content returns to the server, and updates the timestamp of the reading described image file in first memory block.
3. the method according to claim 1, wherein the memory node disappears according to described image read requests
Breath, Xiang Suoshu server returns to respective image file, and creates the record information of respective image file in second memory block,
Specifically:
The memory node is identified according to the image file in described image read requests message, and determining in the caching system is
It is no to be stored with described image file identification；
In the caching system in the case where not stored described image file identification, the memory node is in the storage hard disk
It is middle to inquire content of image files corresponding with described image file identification, and returned in described image file to the server
Hold；And corresponding store to described first of the timestamp of described image file identification and reading described image file is stored
Area, and described image file identification and described image file content correspondence are stored to second memory block.
4. the method according to claim 1, wherein the method also includes:
The memory node determines that storage time is more than described according to the timestamp in preset time and first memory block
The image file of preset time, and delete first memory block, when the storage time in the second memory block is more than default
Between image file relevant information, wherein described image relevant information includes image file mark, content of image files, reading
The timestamp of image file.
5. the method according to claim 1, wherein the method also includes:
Quantity of the memory node in the image file mark for detecting first memory block or the storage of the second memory block
When reaching preset quantity, according to the timestamp for reading image file in first memory block, deletes first deposit sequentially in time
Enter the image file relevant information of the caching system, wherein described image relevant information includes image file mark, image text
Part content, the timestamp for reading image file.
6. the method according to claim 1, wherein first memory block or second memory block storage
There are the reading times to respective image file, the method also includes:
Quantity of the memory node in the image file mark for detecting first memory block or the storage of the second memory block
When reaching preset quantity, Delete query number is less than preset times and is stored in the time in the caching system sequentially in time
The relevant information of longest image file, wherein described image relevant information include image file mark, content of image files,
It reads the timestamp of image file, read the number of image file.
7. according to claim 1 to method described in 6 any one, which is characterized in that in the transmission line of electricity distributed system
In a memory node receive the image reading request message from server before, the method also includes:
The server, which receives, to be carried out the image file of self terminal and obtains message, described image file acquisition message include it is following at least
One item of image the file information: image file name, image file keyword, image file mark；The server is according to
At least one image file information determines the mark of described image file corresponding memory node mark and image file；Wherein,
The corresponding storage image file information of the server and memory node identify.
8. the method according to the description of claim 7 is characterized in that the method also includes:
The server obtains the caching system of each memory node in multiple memory nodes in the transmission line of electricity distributed system
The quantity of the image file mark stored in system；And the image file mark quantity stored in having caching system is more than the first number
When measuring threshold value, target storage node is determined；The target storage node is that the image file of caching system storage identifies quantity not
More than the memory node of the second amount threshold；
It is more than that the parts of images file in the caching system of the first amount threshold is believed that image file is identified quantity by the server
Breath is stored into the caching system of the target storage node.
9. the image file reading device in a kind of transmission line of electricity monitoring system characterized by comprising receiving unit, storage
Unit, cache unit and data processing unit；
The receiving unit receives the image from server for a memory node in transmission line of electricity distributed system and reads
Take request message, described image read requests message, comprising: the mark of target storage node mark and image file；
The storage unit is for storing image file；
The cache unit is used to cache the record information for reading described image file；The cache unit includes the first memory block
With the second memory block, first memory block is used for the mark of image file is corresponding with the timestamp of described image file is read
It stores, the content and respective image file identification of image file in the storage hard disk that second memory block is used to read
Corresponding storage；
For the data processing unit according to described image read requests message, Xiang Suoshu server returns to respective image file, and
The record information of respective image file is created in second memory block or updates the record information of respective image file.
10. a kind of image file in transmission line of electricity monitoring system reads system characterized by comprising server and at least
Any memory node of one claim 1 to 8.
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| CN111176557A (en) * | 2019-11-13 | 2020-05-19 | 中国科学院国家天文台 | Data reading and storing method and data reading and storing device |
| CN111176557B (en) * | 2019-11-13 | 2022-08-02 | 中国科学院国家天文台 | Data reading and storing method and data reading and storing device |
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