CN104243481B - A kind of method and system of power information acquisition advance data processing - Google Patents
A kind of method and system of power information acquisition advance data processing Download PDFInfo
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Abstract
A kind of method and system of power information acquisition advance data processing, including (1) are described with epoll_create () function creation file, and set the socket descriptor number of management；(2) creation and the associated receiving thread of epoll；(3) socket descriptor ListenSock is listened in creation, and is set as non-blocking mode, and calling Listen () function to listen on socket, whether there is or not new connection requests；(4) if any new connection request, call accept () function, client socket descriptor is added to epoll_data association, and sets the descriptor as non-obstruction, event type to be processed is set in epoll_event structure to read and writing；(5) as having data readable on socket descriptor, readable queue then is added in the socket descriptor, and receiving thread is notified to read in data, the data received are put into the chained list for receiving data, the data packet of feedback is put into and is sent in data link table, thread to be sent is waited to send.
Description
Technical field
The present invention relates to a kind of data processing method and system, in particular to a kind of power information acquisition advance data
The method and system of reason.
Background technique
The intelligence of (smart power grids) power grid is known as " power grid 2.0 " by people, and is summarised as with integrated
, based on high-speed bidirectional communication network, using sensing and measuring technique, equipment and technology, control method and DSS
Realize that the reliable of power grid, safety, economy, efficient, the environmental-friendly and safe purpose of use, main feature include self-healing, excitation
With include user, resist attack, provide and meet the requirement quality of user's 21 century electric energy, allow to access different forms of electricity generation, open
The effectively optimizing operation of dynamic electricity market and assets.
With the further development of power grid operation intellectual management, a large amount of smart machines are disposed and be mounted with to distribution system
(such as distribution terminal, intelligent electric meter and sensor).In order to support more complicated, more intelligent adapted electric industry to be engaged in, need to intelligence
It can equipment measuring point progress density and the higher monitoring of frequency and acquisition.In order to meet the requirement of intensive lean management, it is
System concentrates construction and deployment is the following inexorable trend.The userbase of each net provincial electric power company's power information acquisition system, generally
Million or even millions or more are substantially at, in view of a data are sent on the every 15min of terminal, if this subtask does not exist in this way
The mass data in a cycle has been handled in 15min, will lead to the delay of queue accumulation and data subsequent processing, therefore save
The power information acquisition front-end processor system that grade is concentrated will be faced with the immense pressure of millions data tidal bore.
Due to the network frame that existing power information acquisition framework is a layering, such front-end processor system is in communication
Access is acquisition terminal rather than intelligent electric meter, so the number of objects that front-end processor system need to be directly accessed can greatly reduce.But
With the development of the IP communication technology, and in terms of network standardization and scalability, the IP communication technology is used
The trend of power utilization information collection system local network (hereinafter referred to as local network) becomes increasingly conspicuous, especially IPv6 local network into
One step application, following each intelligent electric meter and sensor will have independent IP address, and main station system and terminal intelligent equipment will
End-to-end direct communication, therefore the pressure that the front server of front-end processor system faces will be bigger, and a large amount of connection communication links
It undoubtedly will seriously affect the reliability, real-time and scalability of whole system with processing data.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of method of power information acquisition advance data processing and is
System is linked into main website to better solve the magnanimity smart machine with IP address, and a series of high concurrents of bring, tidal bore
The problems such as formula blocks, the present invention propose a kind of new Network Load Balance algorithm process network connectivity problem；It proposes in preposition clothes
EPOLL model is built on business device to handle interaction data；It proposes to increase preposition routing module, is responsible for front end processor and application clothes
The data processing of business.The present invention is directed to the access " bottle when magnanimity measuring terminal data communications such as the intelligent electric meter based on IP endpoint
Neck " problem, improves the frame module of acquisition system, and a kind of method for proposing power information mass data access, solves super
High concurrent and congestion problems when extensive connection.
The purpose of the present invention is adopt the following technical solutions realization:
A kind of method of power information acquisition advance data processing, it is improved in that the method includes
(1) it is described with epoll_create () function creation file, and sets the socket descriptor number of management；
(2) creation and the associated receiving thread of epoll；
(3) socket descriptor ListenSock is listened in creation, and is set as non-blocking mode, calls Listen () function
Listen to that whether there is or not new connection requests on socket；
(4) if any new connection request, accept () function is called, client socket descriptor is added to epoll_
Data association, and the descriptor is set as non-obstruction, event type to be processed is set in epoll_event structure to read
With write；
(5) as having on socket descriptor, data are readable, then readable queue are added in the socket descriptor, and notify to connect
Take-up journey reads in data, and the data received are put into the chained list for receiving data, the data packet of feedback is put into transmission
In data link table, thread to be sent is waited to send.
Preferably, the step (2) includes creation and the associated receiving thread of epoll, and application program can create reception
Reading notification event on thread process epoll, specific needs and facility environment of the quantity of thread dependent on program.
Preferably, the step (3) includes that socket descriptor ListenSock is listened in creation；The descriptor is set as
Non-blocking mode calls Listen () function to be listened on socket whether there is or not new connection request, in epoll_event structure
It is middle to set EPOLLIN, working method epoll_ET for event type to be processed, thing is registered using epoll_ctl ()
Part starts network monitoring thread.
Preferably, the step (4) includes that epoll event shows the connection request for having new, then calls accept () function,
Client socket descriptor is added to epoll_data association, sets the descriptor as non-obstruction, in epoll_event
Event type to be processed is set in structure to read and writing, working method epoll_ET.
Preferably, the step (5) includes that such as epoll event shows have data readable on socket descriptor, then should
Readable queue is added in socket descriptor, and receiving thread is notified to read in data, and the data received are put into reception data
Chained list in, through logical process, the data packet of feedback is put into and is sent in data link table, waiting is sent by transmission thread.
Further, such as the certain threshold values of chained list length arrival of reception data, then local file is created, to data reception chain
Table overflow data carries out local cache.
Further, in the network monitoring thread starting circulation, epoll_wait () waits epoll event to occur.
The present invention is based on a kind of power informations that another object provides to acquire advance data processing system, and improvements exist
In the system comprises sequentially connected application service module, front end processor routing module, front end processor clusters, Network Load Balance
Device and electric terminal.
Preferably, the front end processor routing module is connect with application server module and front end processor cluster respectively, will before
Machine parsing data are set to send in corresponding application service module；Save terminal network information and front end processor server network information
Association structure figure responds the association modification request of front end processor.
Preferably, the front end processor cluster: including more computers that are mutually indepedent, being interconnected by high speed network, and with
Triangular web mode is managed.
Preferably, attachable client number on the Network Load Balance device setting front server, connection is asked
It asks and is connected to circuiting sequentially on each server for allowing to connect.
Further, it when connection number reaches the threshold value of setting, is carried out according to the real time load situation of each front server
Distribution appropriate；Performance monitoring software by being located at front server transmits preposition service by " heartbeat " industrial siding between cluster
The real time load of device.
Further, the preposition routing module saves front end processor carried terminal IP information and local IP address registration
Contingency table, in downlink data transmission, preposition routing module is found corresponding preposition according to end message in registration contingency table
Server will carry out message assembling and issue in downlink data transmission to the front server；It is preposition when socket migration occurs
The change order that routing receives uplink modifies to registration contingency table.
Compared with the prior art, the invention has the benefit that
The present invention utilizes existing cluster server technology, and modification is for the Network Load Balance algorithm being connected to the network to simultaneously
Hair connection is suitably shunted, and increases the migration algorithm realization front end processor clothes of client connection on Network Load Balance device
The failure migration and flexible dilatation of business device；Increase front end processor routing module completion uplink message in scheme simultaneously accurately to issue
To electric terminal, front end processor server load is shared and alleviated；And EPOLL module is built in front end processor server and carries out data
Stream process.The present invention solves the high concurrent and congestion when the connection of the measuring terminals magnanimity such as intelligent electric meter based on IP endpoint
" bottleneck " problem.
Detailed description of the invention
Fig. 1 is that a kind of power information provided by the invention acquires advance data processing system structure chart.
Fig. 2 is client TCP connection provided by the invention to front end processor distribution diagram.
Fig. 3 is the data connection figure after client SOCKET provided by the invention is established.
Fig. 4 is the method flow diagram that a kind of power information provided by the invention acquires advance data processing.
Fig. 5 is preposition routing module data flow figure provided by the invention.
Specific embodiment
Specific embodiments of the present invention will be described in further detail with reference to the accompanying drawing.
Well known function involved in the present invention is explained as follows:
Epoll (): in the network programming of linux, the new method that is proposed compared to select mechanism；
Epoll_create (): the handle for creating an epoll, size are used to that kernel is told to monitor the big of number
It is small；
Socket descriptor: i.e. socket descriptor；
ListenSock: socket is listened to；
Listen (): i.e. intercepting method；
Accept (): receive new connection；
Epoll_data: i.e. epoll data；
Epoll_event: i.e. epoll event；
EPOLLIN: indicate that corresponding filec descriptor can read (including opposite end SOCKET normal switching-off)；
EPOLL_ET: being set as edge-triggered (Edge Triggered) mode for EPOLL, this is triggered relative to level
For (Level Triggered)；
Epoll_ctl (): the function is used to control the event on some epoll filec descriptor, can be repaired with registered events
Change event, deletion event；
Epoll_wait (): waiting the generation of event, is similar to select () calling.
System structure in the present invention is as shown in Fig. 1, and wherein application service module and electric terminal are and summary of the invention
Relevant data source and data flow, summary of the invention include:
(1) front end processor routing module: connecting application server module and front end processor cluster, main function are front end processor
Data are parsed to send in corresponding application service module；Simultaneously according to incidence relation, downlink data is accurately sent.In this mould
The association structure figure of terminal network information and front end processor server network information is saved in block, and responds the association modification of front end processor
Request.
Preposition routing module saves front end processor carried terminal IP information and local IP address registration contingency table, in downlink
When data are transmitted, preposition routing module finds corresponding front server according to end message in registration contingency table, and under
Row data, which are transferred on the front server, to be carried out message assembling and issues.When socket migration occurs, preposition routing receives
The change order of uplink modifies to registration contingency table.
(2) front end processor cluster: being the computer that N platform is mutually indepedent, is interconnected by high speed network, they constitute a group,
And managed with triangular web mode, server performance can be improved, reduce cost, improve scalability, enhancing reliability.
Using load balancing cluster in the present invention.
(3) Network Load Balance device: Network Load Balance device presses the place of existing front end processor cluster to the connection of Electricity customers end
Reason ability is shunted, and according to the method for " threshold value repeating query+dynamic load is fed back ", extended network connects to be handled up load balancing
Amount reinforces front end processor data-handling capacity.In the present solution, operating status machine and front end processor server in Network Load Balance device
State machine echoed, when handling failure when the migration and dilatation of socket front end processor server load bridging.
The realization algorithm of Network Load Balance device connects loading sharing algorithm mainly for client: first setting preposition clothes
Attachable client number on business device, by connection request, successively sequence cyclically connects each clothes for allowing to connect to sequence circulation
It is engaged on device；When connection number reaches the threshold value of setting, appropriate point is carried out according to the real time load situation of each front server
Match.The real time load of front server is by being located at the performance monitoring software of front server by " heartbeat " industrial siding between cluster
Transmission.Load balancing when in addition using certain algorithm process failure migration and dilatation.
IP-based terminal device initiates the connection request to Network Load Balance device, by Network Load Balance device according to " threshold
Value repeating query+dynamic load feedback " algorithm is distributed each front server in preposition cluster to all connection requests
On.As shown in Fig. 2, the principle of distribution is the connection data and real time load situation according to front server, and by each preposition
Server and terminal establish communication link, and after communication connection foundation, specific data transmission is as shown in figure 3, directly preposition
Interaction between server and terminal.At this point, Network Load Balance device saves the link information of each terminal, and only to the company of link
Situation is connect to be monitored.
Front server is every to establish a client request connection, then to register on front end processor routing module and connect accordingly
Information is connect, if as shown in figure 5, IP address of terminal is 192.168.1.202, being assigned to IP address through Network Load Balance device is
192.168.1.104 on front server, after connection request foundation, front server is then registered to link information preposition
On routing module, i.e., increase the relationship that IP address is 192.168.1.104 and 192.168.1.202 newly on preposition routing module
It is right.When there is transmitting uplink data, after front server dissection process directly on be sent to application service module, when there is lower line number
According to when transmit, data and end message to be sent are sent to front end processor routing module, front end processor road by application service module
It is found by module according to end message and the front server of the terminal called, and via the front server logarithm found
The terminal to be sent to is issued to after formatting according to assembling.
A kind of method of power information acquisition advance data processing of the present invention specifically:
Epoll model is used when front end processor handles data stream, epoll model is mainly responsible for a large amount of and hair
The request at family is handled in time, completes the data interaction of server and client.Steps are as follows for its concrete implementation:
(1) it is described, is set manageable maximum socket descriptor using epoll_create () function creation file
Number.
(2) creation and the associated receiving thread of epoll, application program can create multiple receiving threads to handle epoll
On reading notification event, the quantity of thread needs and facility environment dependent on the specific of program.
(3) it creates one and listens to socket descriptor ListenSock；The descriptor is set as non-blocking mode, is called
Listen () function is listened on socket whether there is or not new connection request, and thing to be processed is arranged in epoll_event structure
Part type EPOLLIN, working method epoll_ET to improve working efficiency, while using epoll_ctl () registered events,
Finally start network monitoring thread.
(4) network monitoring thread starting circulation, epoll_wait () wait epoll event to occur.
(5) if epoll event shows the connection request for having new, accept () function is called, by client socket
Descriptor is added to epoll_data association, and concurrently setting the descriptor is non-obstruction, and is set in epoll_event structure
Event type to be processed is set to read and writing, working method epoll_ET.
(6) have that data are readable on socket descriptor if epoll event shows, it can by socket descriptor addition
Queue is read, notice receiving thread reads in data, and the data received are put into the chained list for receiving data, through logical process
Afterwards, the data packet of feedback is put into and is sent in data link table, waiting is sent by transmission thread.
(7) if the chained list length for receiving data reaches certain threshold values, local file is created, is overflow to data reception chain table
Data carry out local cache out.
Embodiment
Specific step is as follows for a kind of method of power information acquisition advance data processing:
(1) a certain number of threads are established on front server, and are managed collectively by thread pool；
(2) when client is attached, this is connected by main thread and establishes communication and the client is added to epoll
In monitoring event；
(3) it then notifies receiving thread to carry out reading data when epoll monitors that certain is connected with readable event, and judges number
According to receiving whether chained list length reaches maximum value, the data read are inserted into chained list if not；Otherwise reading
Data are cached in the form of local file, and pending file operates thread process local file；
(4) data processing threads constantly take out data from data receiver chained list and are parsed, handled；When there is lower line number
When according to order, it is medium to be processed that data are directly saved in data transmission chained list by data processing threads；
(5) data transmission line journey detects when having data in chained list to be sent, is taken out data via data processing line
Preposition routing module is issued to after journey assembling formatting processing to be distributed.
In conclusion the access when present invention is for magnanimity measuring terminal data communications such as intelligent electric meters based on IP endpoint
" bottleneck " problem, improves the frame module of acquisition system, and a kind of method for proposing power information mass data access, solves
High concurrent and congestion problems when ultra-large connection.
Finally it should be noted that: the above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, institute
The those of ordinary skill in category field can still modify to a specific embodiment of the invention referring to above-described embodiment or
Equivalent replacement, these are applying for this pending hair without departing from any modification of spirit and scope of the invention or equivalent replacement
Within bright claims.
Claims (3)
1. a kind of method of power information acquisition advance data processing, which is characterized in that the method includes
(1) it is described with epoll_create () function creation file, and sets the socket descriptor number of management；
(2) creation and the associated receiving thread of epoll；
(3) socket descriptor ListenSock is listened in creation, and is set as non-blocking mode, and Listen () function is called to cover
It connects and listens to that whether there is or not new connection requests on word；
(4) if any new connection request, accept () function is called, client socket descriptor is added to epoll_data
Association, and set the descriptor as non-obstruction, event type to be processed is set in epoll_event structure to read and
It writes；
(5) as having on socket descriptor, data are readable, then readable queue are added in the socket descriptor, and notify to receive line
Journey reads in data, and the data received are put into the chained list for receiving data, the data packet of feedback is put into transmission data
In chained list, thread to be sent is waited to send；
System suitable for power information acquisition advance data processing method includes sequentially connected application service module, front end processor
Routing module, front end processor cluster, Network Load Balance device and electric terminal；
The front end processor routing module is connect with application server module and front end processor cluster respectively, and front end processor is parsed data
It sends in corresponding application service module；The association structure figure of terminal network information and front end processor server network information is saved,
Request is modified in the association for responding front end processor；
The front end processor cluster: including more computers that are mutually indepedent, being interconnected by high speed network, and with triangular web mode
It is managed；
Attachable client number on the Network Load Balance device setting front server, circuits sequentially ground for connection request
It is connected on each server for allowing to connect；
When connection number reaches the threshold value of setting, distribution appropriate is carried out according to the real time load situation of each front server；By
Pass through the real time load of " heartbeat " the industrial siding transmission front server between cluster positioned at the performance monitoring software of front server；
The front end processor routing module saves front end processor carried terminal IP information and local IP address registration contingency table, under
When row data are transmitted, preposition routing module finds corresponding front server in registration contingency table according to end message, will under
Row data, which are transferred on the front server, to be carried out message assembling and issues；When socket migration occurs, in preposition routing receiving
Capable change order modifies to registration contingency table；
The step (2) includes creation and the associated receiving thread of epoll, and application program can create receiving thread processing
Reading notification event on epoll, specific needs and facility environment of the quantity of thread dependent on program；
The step (3) includes that socket descriptor ListenSock is listened in creation；The descriptor is set as non-blocking mode,
Listen () function is called to be listened on socket whether there is or not new connection request, it will be to be processed in epoll_event structure
Event type is set as EPOLLIN, working method epoll_ET, using epoll_ctl () registered events, starts network prison
Sight journey；
The step (4) includes that epoll event shows the connection request for having new, then accept () function is called, by client
Socket descriptor is added to epoll_data association, sets the descriptor as non-obstruction, sets in epoll_event structure
Event type to be processed is set to read and writing, working method epoll_ET；
The step (5) includes that data are readable as epoll event shows to have on socket descriptor, then by the socket descriptor
Readable queue is added, and receiving thread is notified to read in data, the data received are put into the chained list for receiving data, through patrolling
Processing is collected, the data packet of feedback is put into and is sent in data link table, waiting is sent by transmission thread.
2. a kind of method of power information acquisition advance data processing as described in claim 1, which is characterized in that as received number
According to chained list length reach certain threshold values, then create local file, local cache carried out to data reception chain table overflow data.
3. a kind of method of power information acquisition advance data processing as described in claim 1, which is characterized in that the network
It monitors in thread starting circulation, epoll_wait () waits epoll event to occur.
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