CN100544261C - A kind of data distributing/obtaining method of information Network Based - Google Patents
A kind of data distributing/obtaining method of information Network Based Download PDFInfo
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- CN100544261C CN100544261C CNB2005101306689A CN200510130668A CN100544261C CN 100544261 C CN100544261 C CN 100544261C CN B2005101306689 A CNB2005101306689 A CN B2005101306689A CN 200510130668 A CN200510130668 A CN 200510130668A CN 100544261 C CN100544261 C CN 100544261C
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Abstract
The invention belongs to data distribution/distribution field, specially refer to a kind of data distributing/obtaining method of information Network Based.This method comprises that the resource acquisition node sends the request of obtaining resource to the resource index server; The resource index server is retrieved in the resource status storehouse after the request of receiving, and finds out the address of current all resources equity point that described specific resources is provided and returns neighbor list according to proximity principle to the resource acquisition node; The address that the resource acquisition node provides according to neighbor list, the resource equity point on neighbor list sends acquisition request conforms and receives or use resource.Compare with at present popular P2P network mechanism, the present invention has following advantage: made full use of physical network topology information, obtained nearest neighbor list; Alleviated the multiple data path because of using stacked network (OVERLAYNETWORK) to cause in the physical network; Alleviate network burden, accelerated the speed that resource equity point obtains data resource.
Description
Technical field
The invention belongs to data distribution/distribution field, specially refer to a kind of data distributing/obtaining method of information Network Based.
Background technology
In data distribution/distribution field, adopt two class data distribution/distribution methods usually at present: (1) is based on the controlled content distributing network of operator (CDN:Content Distribution Network) (2) end-to-end (P2P:Peer to Peer) data distribution/acquisition methods based on terminal computer system.
In data distribution/distribution research field, also have and attempt exploration that CDN technology and P2P technology are combined, the server buffers node promptly is set in the P2P network (can be online for a long time, reliability, service ability, port speed are all than terminal system height), also the someone claims that this method is a second generation P2P technology.
The CDN technology is based on traditional client-server technology, and be used in combination agency/buffering (Proxy/Cache) technology, this technology is applied to web service, VOD service etc. the earliest, but usually be limited by disposal ability, the port speed of server, thereby have irremediable significant deficiency aspect userbase of being served and the region covering.
The appearance of P2P technology has solved the predicament that the CDN technology is faced, can infinite expanding on userbase, then approaching the acceptable degree of user aspect the performance performance, BitTorrent, electric donkey (eMule) that application that this respect influence is bigger such as file are downloaded and the Skype that can make a phone call etc. on the net.
The development genesis of P2P technology is in stacked network (OVERLAY NETWORK), this network is the logical network that breaks away from concrete physical network, make up based on different application, different participation entities, therefore network topology structure is used the performance paid close attention to, reliability and different according to concrete, and tree (Tree) and network structure (Mesh) are arranged usually.
Because the P2P network has been ignored the topological structure of physical network, thereby can produce various influences to the network of reality, be arranged in same physics Ethernet as two application nodes, and in the P2P network, be in the different branches of different logical topology tree, if therefore these two nodes will be communicated by letter, must be through the different nodes in two branches, till having identical branch node; For example new node joins in the P2P network again, because the network struction logic of P2P, new node should be a father node with the node in the same physical network, and the node of in fact selecting that is arranged in another physical network really is as father node, causes the increase of communication delay or performance decrease or the like.
Summary of the invention
The objective of the invention is to overcome available data and distribute/obtain the deficiency of technology, the physical network feature is combined with the P2P network technology, thereby a kind of data distributing/obtaining method of information Network Based efficiently is provided.
(woulding you please examine the content of following technical scheme)
For achieving the above object, the data distributing/obtaining method of information Network Based provided by the invention relates to network topology server, resource index server and the resource equity point three kind equipment entities in the computer network, comprise: resource status library initialization method and resource distribution/acquisition methods, wherein
Described resource status library initialization method comprises the steps:
11) the network topology server obtains the network information of each the resource equity point in the service range, and the described network information comprises the network address;
12) according to the network address information that obtains in the step 11), with the method generation physics network topological diagram of network graph theory;
13) in the network topology server, set up the physical network topology information storehouse, the physical network topology figure that generates in information such as the network address of each resource equity point of obtaining in the step 11) and the step 12) is stored in the physical network topology information storehouse;
14) the resource index server obtains network topological information from the physical network topology information storehouse of network topology server;
15) in the resource index server, set up the resource status storehouse, various state of resources information on the storage networking in this resource status storehouse; This resource state information comprises the network address of the resource equity point at resource name and resource place.
Described resource distribution/acquisition methods comprises the steps:
21) suppose that a certain resource equity point is the resource acquisition node, this resource acquisition node sends the request of obtaining a certain specific resources to the resource index server, comprises the title of the specific resources that need obtain in this request;
22) the resource index server is receiving step 21) in after the request of sending, in the resource status storehouse, retrieve, find out the current address that all resources equity points of described specific resources are provided;
23) in step 22) in the resource that the finds equity dot address, sort by proximity principle, get top n address after the ordering as neighbor list;
24) the resource index server returns neighbor list to the resource acquisition node;
25) address that provides according to neighbor list of resource acquisition node, the resource equity point on neighbor list sends acquisition request conforms and receives or use resource;
In the technique scheme, the network information of each the resource equity point in the service range in the described step 11) is obtained by using snmp protocol, CMIP agreement or other NMP, perhaps uses the mode of human configuration to obtain.
In the technique scheme, comprise internodal annexation, the network address, physical distance in the described step 12) among the physical network topology figure, to the first propagation delay time information of jumping;
In the technique scheme, described step 23) in, described proximity principle is nearest principle of physics or the shortest principle of time delay;
Wherein, the nearest principle of physics be meant with the node jumping figure of resource acquisition node request resource to having what, the minimum node of jumping figure then is the nearest node of physics;
The shortest principle of time delay is meant that from the node of resource acquisition node request resource to having the node of the time minimum of information transmission is the pipe nipple point of time delay.
In the technique scheme, also comprise resource status storehouse maintaining method, its step is as follows:
31) each resource equity point regularly feeds back to the resource index server to all resource statuss in this node;
32) the resource index server is according to each resource equity point feedack, regular update resource status storehouse.
Compare with at present popular P2P network mechanism, the present invention has following advantage: made full use of physical network topology information, obtained nearest neighbor list; Alleviated the multiple data path because of using stacked network (OVERLAYNETWORK) to cause in the physical network; Alleviate network burden, accelerated the speed that resource equity point obtains data resource.
Description of drawings
Fig. 1 utilizes the P2P network of physical network topology structure to constitute
Fig. 2 is based on the P2P network scenarios of two layer physical networks
Fig. 3 is the resource status library initialization method
Fig. 4 is resource distribution/acquisition methods
Fig. 5 is a resource status storehouse maintaining method
Embodiment
The invention provides a kind of data distributing/obtaining method of information Network Based, this method combines feature, the characteristic of physical network with the P2P network, particularly the topological structure of physical network is applied to point-to-point data and distributes/obtain.
The present invention relates to three kind equipment entities, comprise network topology server, resource index server and resource equity point, see Fig. 1.
Wherein, the network topology server is a class by snmp protocol or similar agreement, and manual method obtains the topological structure of a certain local or Wide Area Network, and can with these information outwards output equipment/software entity.
The resource index server is the particular location that a class is determined resource in the resource network, and these information can be offered the equipment/software entity of resource equity point.
Resource equity point is that a class can either be enjoyed resource from other nodes, and the equipment/software entity of resource can be provided to other nodes again, in present network, can be server, PC, PDA, mobile phone etc.
The resource of indication can be the network bandwidth, hard-disc storage space, computing capability and file, media stream data etc. among the present invention.
Below in conjunction with the drawings and specific embodiments, the data distributing/obtaining method of information Network Based provided by the invention is further elaborated.
Embodiment
Present embodiment comprises: resource status library initialization method, resource distribution/acquisition methods and resource status storehouse maintaining method.
The resource status library initialization method comprises the steps (as shown in Figure 3):
11) the network topology server obtains the network information that in the service range each may resource equity point, and the described network information comprises the network address, geographical position, is subordinate to unit, administrative staff etc.; The network address of each resource equity point can obtain by using NMPs such as snmp protocol, CMIP agreement, also can use the mode of human configuration to obtain.
12) according to the information such as the network address that obtain in the step 11), generate the physics network topological diagram according to the method for network graph theory, comprise internodal annexation, the network address, physical distance among this figure, to first information such as propagation delay time of jumping;
13) in the network topology server, set up the physical network topology information storehouse, the physical network topology figure that generates in information such as the network address of each resource equity point of obtaining in the step 11) and the step 12) is stored in the physical network topology information storehouse;
14) the resource index server obtains network topological information from the physical network topology information storehouse of network topology server;
15) in the resource index server, set up the resource status storehouse, various state of resources information on the storage networking in this resource status storehouse.This resource state information comprises the network address of the resource equity point at resource name and resource place.Table 1, the 2nd is the resource state information storage format of example with the file, and wherein table 1 is the general information table, and table 2 is resource status table,
| Resource name | FILE1 |
| Block size (K byte) | 2 |
| Total block data | 1000 |
Table 1
| Piece number | Deposit position |
| 1 | 10.1.1.1、10.1.0.1 |
| 2 | 10.1.2.1、10.1.1.1 |
| … | … |
Table 2
Resource distribution/acquisition methods comprises the steps (as shown in Figure 4):
21) a certain resource equity point sends the request of obtaining a certain specific resources to the resource index server, comprises the title (as FILE1) of the specific resources that need obtain in this request, and this title can be words identification, numbering, additional character.For ease of understanding, the resource equity of acquisition request resource here put call the resource acquisition node.
22) the resource index server is receiving step 21) in after the request of sending, in the resource status storehouse, retrieve, find out the current address that all resources equity points of described specific resources are provided.
23) in step 22) in the resource that the finds equity dot address, sort by nearest principle of physics or the shortest principle of time delay, get top n address after the ordering as neighbor list.
Wherein, the nearest principle of physics be meant with the node jumping figure of resource acquisition node request resource to having what, the minimum node of jumping figure then is the nearest node of physics;
The shortest principle of time delay is meant that from the node of resource acquisition node request resource to having the node of the time minimum of information transmission is the pipe nipple point of time delay.
24) the resource index server returns neighbor list to the resource acquisition node.
25) address that provides according to neighbor list of resource acquisition node, resource on neighbor list equity point sends acquisition request conforms and receives resource data that (as institute's requested resource is abstract resource such as the network bandwidth, hard-disc storage space, computing capability, then send the use resource request, and obtaining response back use institute request resource).
It should be noted that when 1 in the neighbor list or several equity point roll off the production line, then again to resource index server application neighbor list.With the request msg file is example.Suppose that neighbours' quantity that equity point uses simultaneously is 5 to the maximum, then when initial demand, the resource index server provides at first 5 by ordering, and the equity point is then respectively towards 5 equity point request msgs; If find wherein to roll off the production line, then need the resource acquisition node again to resource index server application neighbor list by 1 or several equity point.
Resource status storehouse maintaining method comprises the steps (as shown in Figure 5):
31) each resource equity point regularly feeds back to the resource index server to all resource statuss in this node.
32) the resource index server is according to each resource equity point feedack, regular update resource status storehouse.
Fig. 2 is an application scenarios provided by the invention, and it is a subzone network of being made up of Layer 2 switch, on physical network, described network topology server, resource index server and resource equity point such as among the figure distribution.Hypothesis resource equity point is enjoyed when downloading service can be provided in the present embodiment.
The network operation is prepared: as the initial part of system, at first need the network topology server prepares, for the simplification process, suppose that layer 2-switched subzone network topology is by outside BOSS system or manual being input in the network topology server in the present embodiment; The initialization of resource index server: obtain network topological information from the network topology server, the information of data resource is set up index in the resource index server simultaneously; Suppose the P2P system after operation a period of time, the distribution of data message reaches following state: data file file1 storage fully in resource equity point 2,3,5,6,7, in 1 request of sending data file file1 of moment t resource equity point.Below in conjunction with this situation descriptive information reciprocal process:
(a) resource equity point 1 is to the request of sending of resource index server (request msg file f ile1);
(b) the resource index server is according to network topological information and the nearest principle of physics, and the address list of resource equity point 2,3 is sent to resource equity point 1; (hypothesis is returned two neighbours' tabulation here)
(c) resource equity point 1 is put the different piece of 2,3 transmission data file file1 respectively from the resource equity according to neighbor list;
(d) suppose in document transmission process, resource equity point 3 off-lines, it is unsuccessful that resource equity point 1 detects transfer of data, and then to the new neighbor list of resource index server requests, the neighbours that at this moment return are resource equity points 7, rather than resource equity point 5 or 6;
(e) the resource index server regularly detects the presence of resource equity point, finds resource equity point 3 off-lines here, and then the service available state table of updated data file file1 removes resource equity point 3; Put 1 after data file file1 is transferred to this locality fully in the resource equity simultaneously, the resource index server joins the service available state table of data file file1 with it.
Claims (3)
1, a kind of data distributing/obtaining method of information Network Based, it is characterized in that, this method relates to network topology server, resource index server and the resource equity point three kind equipment entities in the computer network, comprising: resource status library initialization method and resource distribution/acquisition methods, wherein
Described resource status library initialization method comprises the steps:
11) the network topology server obtains the network information of each the resource equity point in the service range, and the described network information comprises the network address;
12) according to the network address information that obtains in the step 11), with the method generation physics network topological diagram of network graph theory; Comprise internodal annexation, the network address, physical distance among the described physical network topology figure and to the first propagation delay time information of jumping;
13) in the network topology server, set up the physical network topology information storehouse, the physical network topology figure that generates in reciprocity network address information of putting of each resource that obtains in the step 11) and the step 12) is stored in the physical network topology information storehouse;
14) the resource index server obtains network topological information from the physical network topology information storehouse of network topology server;
15) in the resource index server, set up the resource status storehouse, various state of resources information on the storage networking in this resource status storehouse; This resource state information comprises the network address of the resource equity point at resource name and resource place, described resource packet includes network bandwidth, hard-disc storage space, computing capability and file and media stream data;
Described resource distribution/acquisition methods comprises the steps:
21) suppose that a certain resource equity point is the resource acquisition node, this resource acquisition node sends the request of obtaining a certain specific resources to the resource index server, comprises the title of the specific resources that need obtain in this request;
22) the resource index server is receiving step 21) in after the request of sending, in the resource status storehouse, retrieve, find out the current address that all resources equity points of described specific resources are provided;
23) in step 22) in the resource that the finds equity dot address, sort by proximity principle, get top n address after the ordering as neighbor list; Described proximity principle is nearest principle of physics or the shortest principle of time delay;
Wherein, the nearest principle of physics be meant with the node jumping figure of resource acquisition node request resource to having what, the minimum node of jumping figure then is the nearest node of physics;
The shortest principle of time delay is meant that from the node of resource acquisition node request resource to having the node of the time minimum of information transmission is the pipe nipple point of time delay;
24) the resource index server returns neighbor list to the resource acquisition node;
25) address that provides according to neighbor list of resource acquisition node, the resource equity point on neighbor list sends acquisition request conforms and receives or use resource.
2, press the data distributing/obtaining method of the described information Network Based of claim 1, it is characterized in that, the network information of each the resource equity point in the service range in the described step 11) is obtained by using snmp protocol, CMIP agreement or other NMP, perhaps uses the mode of human configuration to obtain.
3, by the data distributing/obtaining method of the described information Network Based of claim 1, it is characterized in that also comprise resource status storehouse maintaining method, its step is as follows:
31) each resource equity point regularly feeds back to the resource index server to all resource statuss in this node;
32) the resource index server is according to each resource equity point feedack, regular update resource status storehouse.
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