CN104753873A - Content service providing method, device and system - Google Patents

Abstract

The invention discloses a method, device and system for providing content services, which are used to solve the problem in the prior art that the P2P system cannot provide stable and reliable services when a large number of nodes withdraw from the P2P system. The method includes: when the peer-to-peer network P2P node cannot find the target node where the content fragment is located in the P2P autonomous domain where it is located, sending a content fragment search request to the cloud directory server corresponding to the P2P autonomous domain; receiving the The information of the target node where the content fragment is fed back by the cloud directory server; sending a content service request to the target node indicated by the information of the target node, so as to acquire the content fragment.

Description

A method, device and system for providing content services

technical field

The present invention relates to the field of communication technology, in particular to a method, device and system for providing content services.

Background technique

In recent years, content services including content download and video-on-demand have developed rapidly, storage capacity has reached hundreds of thousands of terabytes (T) bytes, and users have reached tens of millions. Peer-to-Peer (P2P for short) ) as a network storage distribution technology is widely used in content services. P2P is a new communication mode, which is different from the traditional client and server structure (Client/Server). Under the Client/Server structure, the server provides content services centrally. The user's request must be completed through the server. When the user's When the number of requests increases, the system will become a bottleneck. In the P2P system, users can communicate directly, share resources and work together, and share the two roles of service users and service providers, making full use of the resources and network bandwidth of each node, reducing network congestion, Significantly improve resource utilization.

Although a decentralized organization such as P2P has the above-mentioned advantages, due to the great randomness of joining and exiting nodes in the P2P system, the stability and reliability of the P2P system in providing content services are relatively poor.

Contents of the invention

Embodiments of the present invention provide a method, device and system for providing content services to solve the problem that the P2P system in the prior art cannot provide stable and reliable content services.

Embodiments of the present invention adopt the following technical solutions:

A method of providing content services, comprising:

When the peer-to-peer network P2P node cannot find the target node where the content fragment is located in the P2P autonomous domain where it is located, it sends a content fragment search request to the cloud directory server corresponding to the P2P autonomous domain;

receiving the information of the target node where the content fragment is located fed back by the cloud directory server;

Sending a content service request to the target node indicated by the information of the target node, so as to obtain the content fragment.

Wherein, the target node indicated by the information of the target node is:

A P2P node in the P2P autonomous domain, or a data node outside the P2P autonomous domain.

Wherein, when the P2P node cannot find the target node where the content fragment is located in the P2P autonomous domain where it is located, it sends a content fragment search request to the cloud directory server, specifically including:

When the P2P node fails to find the target node where the content fragment is located in the P2P autonomous domain where it is located within the preset time or hop count, it sends a content fragment search request to the cloud directory server.

Further, the method also includes:

The P2P node stores the content fragments received from the target node; and

Send the corresponding relationship between itself and the content segment to the cloud directory server, so that the cloud directory server can update the pre-saved storage information of the content segment according to the corresponding relationship.

A method of providing content services, comprising:

The cloud directory server receives the content fragment search request sent by the P2P node; the P2P node is in the P2P autonomous domain corresponding to the cloud directory server;

The cloud directory server determines the target node where the content fragment requested by the content fragment lookup request is located; and

Sending the determined information of the target node to the P2P node, so that the P2P node can obtain content fragments from the target node indicated by the determined information of the target node.

Wherein, the cloud directory server determines the target node where the content fragment requested by the content fragment search request is located, specifically including:

The cloud directory server searches the P2P node where the content fragment is located in the P2P autonomous domain according to the pre-saved content fragment storage information; the content fragment storage information includes the corresponding relationship between the content fragment and the P2P node;

When finding the P2P node where the content fragment is located in the P2P autonomous domain, determining the found P2P node as the target node;

When the P2P node where the content fragment is located is not found in the P2P autonomous domain, the content fragment search request is sent to the content management server, and the content management server searches for the content fragment where the data nodes; and

The data node found by the content management server is determined as the target node.

Further, the method also includes:

receiving the correspondence between the P2P node and the content fragment sent by the P2P node;

The pre-saved content segment storage information is updated according to the corresponding relationship.

A P2P node, including:

A content fragment search request sending unit, used to send content fragments to the cloud directory server corresponding to the P2P autonomous domain when the peer-to-peer network P2P node cannot find the target node where the content fragments are located in the P2P autonomous domain where it is located find request;

a receiving unit, configured to receive the information of the target node where the content fragment is fed back by the cloud directory server;

The content service request sending unit is configured to send a content service request to the target node indicated by the information of the target node received by the receiving unit, so as to obtain the content fragment.

Wherein, the target node indicated by the information of the target node is:

A P2P node in the P2P autonomous domain, or a data node outside the P2P autonomous domain.

Wherein, the content fragment search request sending unit is specifically used for:

When the P2P node fails to find the target node where the content fragment is located in the P2P autonomous domain where it is located within the preset time or hop count, it sends a content fragment search request to the cloud directory server.

Further, the P2P node also includes:

a storage unit, configured to store content fragments received from the target node;

The correspondence sending unit is configured to send the correspondence between itself and the content segment to the cloud directory server, so that the cloud directory server can update the pre-saved storage information of the content segment according to the correspondence.

A cloud directory server comprising:

A content fragment search request receiving unit, configured to receive a content fragment search request sent by a P2P node; the P2P node is in the P2P autonomous domain corresponding to the cloud directory server;

a target node determination unit, configured to determine the target node where the content segment requested by the content segment search request received by the content segment search request receiving unit is located;

An information sending unit, configured to send the information of the target node determined by the target node determining unit to the P2P node, so that the P2P node can acquire content fragments from the target node indicated by the determined information of the target node.

Wherein, the target node determination unit specifically includes:

A search module, configured to search the P2P node where the content fragment is located in the P2P autonomous domain according to the pre-saved content fragment storage information; the content fragment storage information includes the correspondence between the content fragment and the P2P node relation;

A target node first determination module, configured to determine the found P2P node as the target node when the search module finds the P2P node where the content fragment is located in the P2P autonomous domain;

The second determination module of the target node is used to send the content fragment search request to the content management server when the search module does not find the P2P node where the content fragment is located in the P2P autonomous domain, and the The content management server searches for the data node where the content fragment is located; and determines the data node found by the content management server as the target node.

Further, the cloud directory server also includes:

a corresponding relationship receiving unit, configured to receive the corresponding relationship between the P2P node and the content fragment sent by the P2P node;

An updating unit, configured to update the pre-saved content segment storage information according to the correspondence received by the correspondence receiving unit.

A system for providing content services, comprising: at least one P2P autonomous domain and a cloud directory server corresponding to each P2P autonomous domain, and each P2P autonomous domain contains multiple P2P nodes, wherein:

The P2P node is used to send a content fragment search request to the cloud directory server corresponding to the P2P autonomous domain where it is located when the target node where the content fragment is located cannot be found in the P2P autonomous domain where it is located; receive the cloud The information of the target node where the content fragment is fed back by the directory server; sending a content service request to the target node indicated by the information of the target node to obtain the content fragment;

The cloud directory server is configured to receive the content fragment search request sent by the P2P node; determine the target node where the content fragment requested by the content fragment search request is located; and send the determined information of the target node to the P2P node.

Further, the system also includes: a content management server and a data node; then

The cloud directory server is specifically used for:

According to the pre-saved content fragment storage information, search the P2P node where the content fragment is located in the P2P autonomous domain; the content fragment storage information includes the corresponding relationship between the content fragment and the P2P node; when in the P2P autonomous domain When the P2P node where the content fragment is located is found in the P2P autonomous domain, the P2P node found is determined as the target node; when the P2P node where the content fragment is located is not found in the P2P autonomous domain node, the content fragment search request is sent to the content management server, and the content management server searches for the data node where the content fragment is located; and the data node found by the content management server is determined as the target node.

The beneficial effects of the embodiments of the present invention are as follows:

In the embodiment of the present invention, when the P2P node cannot find the target node where the content fragment is located in the P2P autonomous domain where it is located, it sends a content fragment search request to the cloud directory server corresponding to the P2P autonomous domain, and according to the cloud directory server feedback Compared with the existing technology, even if P2P nodes randomly join and exit randomly in the P2P autonomous domain, P2P nodes in the P2P autonomous domain can obtain content services through the cloud directory server. Therefore, the problem that the P2P system in the prior art cannot provide stable and reliable content services is avoided.

Description of drawings

FIG. 1 provides an implementation flowchart of a method for providing content services according to an embodiment of the present invention;

FIG. 2 is an implementation flow chart of a method for providing content services based on a cloud directory server provided in an embodiment of the present invention;

Fig. 3 is the overall architecture diagram of the system for realizing above-mentioned method in practical application;

Fig. 4 is a flow chart of publishing content based on the above-mentioned system;

FIG. 5 is a flow chart of providing content services based on the above-mentioned system;

FIG. 6 provides a schematic structural diagram of a P2P node according to an embodiment of the present invention;

FIG. 7 provides a schematic structural diagram of a cloud directory server according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a system for providing content services according to an embodiment of the present invention.

Detailed ways

In order to solve the problem in the prior art that the P2P system cannot provide stable and reliable services when a large number of nodes withdraw from the P2P system, an embodiment of the present invention provides a solution for providing content services. In this technical solution, when the P2P node cannot find the target node where the content fragment is located in the P2P autonomous domain where it is located, it sends a content fragment search request to the cloud directory server corresponding to the P2P autonomous domain, and according to the feedback from the cloud directory server Compared with the existing technology, even if P2P nodes randomly join and exit randomly in the P2P autonomous domain, the P2P nodes in the P2P autonomous domain can obtain content services through the cloud directory server, thereby The problem that the P2P system in the prior art cannot provide stable and reliable content services is avoided.

The embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention. And in the case of no conflict, the embodiments and the features of the embodiments in this description can be combined with each other.

The embodiment of the present invention provides a method for providing content services, as shown in FIG. 1 , which is a flow chart for the implementation of the method, specifically including the following steps:

Step 11, when the P2P node cannot find the target node where the content fragment is located in the P2P autonomous domain where it is located, send a content fragment search request to the cloud directory server corresponding to the P2P autonomous domain where it is located;

In this step, when a P2P node needs content services, it first sends a search request for content fragmentation to the P2P autonomous domain where it is located. It can be searched according to the existing distributed hash table (Distributed Hash Table, DHT) search method. When When the target node where the content fragment is located is not found, it sends a content fragment search request to the cloud directory server corresponding to the P2P autonomous domain where it is located.

When the number of P2P nodes in the P2P autonomous domain is relatively large, if each P2P node needs to be searched once, it will take a relatively long search time. Therefore, in order to reduce unnecessary search time, when within the preset time or the number of hops When the target node where the content fragment is located is not found in the P2P autonomous domain where it is located, it sends a content fragment search request to the cloud directory server corresponding to the P2P autonomous domain where it is located.

Step 12, receiving the information of the target node where the content fragment is fed back by the cloud directory server;

In the embodiment of the present invention, the cloud directory server is a new functional module compared with the existing P2P system in the embodiment of the present invention. The data exchange part is called the cloud), and according to the on-demand service and scalability characteristics of the cloud, when the load of the cloud directory server is too large, according to the automatic expansion scheme provided in the cloud computing, a new one can be automatically created cloud directory server and a new P2P autonomous domain corresponding to the new cloud directory server, and transfer some P2P nodes in the P2P autonomous domain corresponding to the cloud directory server with excessive load to the new P2P autonomous domain.

In this step, the target node indicated by the target node information fed back by the cloud directory server may be a P2P node in the P2P autonomous domain, or a data node in the cloud outside the P2P autonomous domain.

Specifically, the content fragmentation storage information in the corresponding P2P autonomous domain is stored in the cloud directory server, and the content fragmentation storage information includes the corresponding relationship between the content fragmentation and the P2P node, so the content fragmentation can be quickly found Find the P2P node where the requested content fragment is located.

However, when the cloud directory server does not find the corresponding P2P node according to the content fragment storage information, for example, when the P2P node storing the content fragment requested by the content fragment search request has left the P2P autonomous domain, according to the specific cloud , the cloud directory server can send the content fragment search request to the content management server in the cloud, and the content management server searches from the data nodes in the cloud, and returns the information of the found data nodes to the cloud directory server, The cloud directory server feeds back the information of the found data nodes to the P2P node.

Step 13, sending a content service request to the target node indicated by the information of the target node, so as to obtain content fragments.

When the P2P node sends a content service request to the target node and receives the content fragment provided by the target node, in order to make other P2P nodes in the P2P autonomous domain find the content fragment conveniently, the embodiment of the present invention can also Further includes:

Step 14, the P2P node stores the content fragments received from the target node;

Step 15, the P2P node sends the corresponding relationship between itself and the above-mentioned content fragments to the cloud directory server, so that the cloud directory server can update the pre-saved storage information of the content fragments according to the corresponding relationship.

The above-mentioned method provided in the embodiment of the present invention will be described below with the cloud directory server as the execution subject.

As shown in FIG. 2 , it is an implementation flowchart of a method for providing content services based on a cloud directory server provided in an embodiment of the present invention. The method comprises the steps of:

Step 21, the cloud directory server receives the content fragment search request sent by the P2P node;

Wherein, the P2P node is in the P2P autonomous domain corresponding to the cloud directory server.

Step 22, the cloud directory server determines the target node where the content fragment requested by the content fragment search request is located;

Specifically, this step may include:

According to the pre-saved content fragment storage information, the cloud directory server searches the content fragment in the P2P autonomous domain to find the P2P node where the requested content fragment is located; wherein, the content fragment storage information includes the content fragment and the P2P node. Correspondence;

When finding the P2P node where the requested content fragment is located in the P2P autonomous domain, determine the found P2P node as the target node;

When the P2P node where the content fragment requested by the content fragment search is not found in the P2P autonomous domain, the content fragment search request is sent to the content management server, and the content management server searches for the data where the content fragment is located. node, and determine the data node found by the content management server as the target node.

In step 23, the cloud directory server sends the determined information of the target node to the P2P node, so that the P2P node can acquire content fragments from the target node indicated by the determined information of the target node.

In order to enable other P2P nodes in the P2P autonomous domain to find the content fragments conveniently, the embodiments of the present invention may further include:

Step 24, the cloud directory server receives the corresponding relationship between the P2P node and the content fragment sent by the P2P node;

Step 25, the cloud directory server updates the pre-saved content segment storage information according to the above correspondence.

In the embodiment of the present invention, when the P2P node cannot find the target node where the content fragment is located in the P2P autonomous domain where it is located, it sends a content fragment search request to the cloud directory server corresponding to the P2P autonomous domain, and according to the cloud directory server feedback Compared with the existing technology, even if a large number of P2P nodes in the P2P autonomous domain exit, the P2P nodes in the P2P autonomous domain can obtain content services through the cloud directory server, thereby solving the existing In technology, when a large number of nodes withdraw from the P2P system, there is a problem that the P2P system cannot provide stable and reliable services.

The specific implementation process of the above method in practical application will be described in detail below.

As shown in FIG. 3 , it is an overall architecture diagram of a system for implementing the above method in practical applications. The system is divided into two parts, one part is in the cloud, including content management server, data node and cloud directory server, etc.; the other part is in the P2P autonomous domain (Z1, Z2, ..., Zn), including multiple P2P nodes, the The system architecture is described in detail as follows:

1. At least one P2P autonomous domain. Each P2P autonomous domain can contain different types of P2P nodes connected to the network, such as personal computers, notebook computers, tablet computers, and mobile phones. These P2P nodes can be fat clients or thin clients, and according to different configurations and user wishes, when serving as service providers, the resources they provide are different. The P2P autonomous domain can be formed according to the user's interests, concerns and circle of friends. Wherein, the P2P nodes in the P2P autonomous domain are connected according to the network topology of the P2P system.

2. Cloud directory server. Each P2P autonomous domain corresponds to a cloud directory server. The cloud directory server is deployed in the cloud, and according to the on-demand service and scalability characteristics of the cloud, when the load of the cloud directory server (including memory and network bandwidth, etc.) is too large, according to the automatic expansion scheme provided in cloud computing , can automatically create a new cloud directory server and a new P2P autonomous domain corresponding to the new cloud directory server, and transfer some P2P nodes in the P2P autonomous domain corresponding to the cloud directory server with an excessive load to the new P2P autonomous domain Medium; and when the number of P2P nodes in the P2P autonomous domain corresponding to the cloud directory server is less than the preset number, the self-service performance of the P2P autonomous domain will be reduced, and a large number of content fragments need to be requested from the data nodes, increasing the cloud The load of the directory server and the data node, so the P2P autonomous domain can be merged with other P2P autonomous domains.

3. Content management server and data nodes. The content management server records and manages all the metadata of the file system, as well as the location of the data node where the content fragment currently resides. The data node saves the content fragments on the local hard disk. To ensure reliability, each content fragment will be copied to multiple data nodes. When a content source publishes a certain content, the content release request is sent to the content management server, and the content management server is responsible for assigning the identification ID of the content fragment and specifying a data node for each content fragment. After that, the content source sends each data The node uploads the corresponding content fragments, and after the upload is completed, the data node reports the saved content fragments to the content management server.

4. P2P autonomous domain and cloud environment. The P2P node initiates a content fragment search request to the P2P autonomous domain where it is located. When the content fragment cannot be found in the P2P autonomous domain, the cloud directory server sends the content fragment search request to the content management server, and the content management server The information of the data node where the content fragment is located is returned to the cloud directory server, and the cloud directory server returns the information to the P2P node that sends the content fragment search request, and the P2P node sends a content service request to the data node indicated by the information, and obtains After the content is fragmented, store the content fragments on the local hard disk. When the number of requests for a content fragment in the cloud reaches a certain number, which may cause a bottleneck in the data node where it is located, according to the scalability characteristics of the cloud, a new data node can be added to store the content fragment and provide content services; and when When the self-service performance in the P2P autonomous domain is good and the data nodes receive fewer content service requests, the data nodes with too small load can be deleted accordingly to make full use of the resources of each data node and reduce resource waste.

As shown in FIG. 4 , it is a flow chart of publishing content based on the above system. The specific implementation process of this process is as follows:

Step 41, when the content source publishes a certain content, send a content distribution request to the content management server;

Step 42, the content management server returns the identification ID of the content fragment and the data node specified for each content fragment to the content source;

Step 43, the content source writes the corresponding content fragment to the specified data node;

Step 44, the designated data node and the backup data node transmit content fragments in a pipelined manner to realize backup;

Step 45, the data node storing the content fragments feeds back the stored content fragments to the content management server;

Step 46, after all the content fragments are transmitted, the content management server publishes the content to the web server, so that the user can view the content services that the system can provide through the web server.

As shown in FIG. 5 , it is a flow chart of providing content services based on the above system. The specific implementation process of this process is as follows:

Step 51, the P2P node sends a content fragment search request to the P2P autonomous domain where it is located, and when the target node where the content fragment is located is not found within the preset hop count or time, it sends a request to the cloud directory server corresponding to the P2P autonomous domain Send a content shard lookup request;

Step 52, the cloud directory server searches the P2P node where the content fragment is located in the P2P autonomous domain according to the pre-saved content fragment storage information; when found, execute step 59, otherwise continue to execute step 53;

Step 53, sending the content segment search request to the content management server;

Step 54, the content management server determines the target data node where the content fragment is located, and sends the determined information of the target data node to the cloud directory server;

Step 55, the cloud directory server sends the information to the P2P node that sends the query request for content fragmentation;

Step 56, the P2P node initiates a content service request to the target data node indicated by the information;

Step 57, the target data node sends the content fragment to the P2P node;

Step 58, after receiving the content fragment, the P2P node stores the content fragment locally, and continues to execute step 512;

Step 59, the cloud directory server sends the information of the target P2P node where the content fragment is located to the P2P node that sends the content fragment query request;

Step 510, the P2P node initiates a content service request to the target P2P node indicated by the information;

Step 511, the target P2P node sends the content fragment to the P2P node;

Step 512, the P2P node reports the content segment storage information to the cloud directory server in the P2P autonomous domain where it is located.

In the embodiment of the present invention, when the P2P node cannot find the target node where the content fragment is located in the P2P autonomous domain where it is located, it sends a content fragment search request to the cloud directory server corresponding to the P2P autonomous domain, and according to the cloud directory server feedback Compared with the existing technology, even if a large number of P2P nodes in the P2P autonomous domain exit, the P2P nodes in the P2P autonomous domain can obtain content services through the cloud directory server, thereby solving the existing In technology, when a large number of nodes withdraw from the P2P system, there is a problem that the P2P system cannot provide stable and reliable services.

At the same time, compared with the P2P system, the above solution provided by the embodiment of the present invention also has the ability to control and manage content services. Through the management of resources stored in the cloud, cloud service providers, usually some large enterprises, are supervised, making it easier to manage the copyright and purity of content. Some popular public content resources can also be realized through sharing in cloud services.

Compared with cloud computing, the above solution provided by the embodiment of the present invention can provide distributed storage of content, utilize the characteristics of P2P decentralization and self-service, and distribute and store resources on each P2P node instead of centralized storage in the cloud Data nodes effectively utilize client resources and reduce bottlenecks in data node resources and network bandwidth in the cloud.

Based on the above concept, an embodiment of the present invention also provides a P2P node, as shown in FIG. 6, which is a schematic structural diagram of the P2P node, including:

The content fragment search request sending unit 61 is used to send the content fragment to the cloud directory server corresponding to the P2P autonomous domain when the peer-to-peer network P2P node cannot find the target node where the content fragment is located in the P2P autonomous domain where it is located. slice lookup request;

A receiving unit 62, configured to receive the information of the target node where the content fragment is fed back by the cloud directory server;

The content service request sending unit 63 is configured to send a content service request to the target node indicated by the target node information received by the receiving unit 62, so as to obtain the content fragment.

Wherein, the target node indicated by the information of the target node may be:

A P2P node in the P2P autonomous domain, or a data node outside the P2P autonomous domain.

Wherein, the content segment search request sending unit 61 can be specifically used for:

When the P2P node fails to find the target node where the content fragment is located in the P2P autonomous domain where it is located within the preset time or hop count, it sends a content fragment search request to the cloud directory server.

Further, the P2P node may also include:

a storage unit 64, configured to store content fragments received from the target node;

The correspondence sending unit 65, configured to send the correspondence between itself and the content fragment to the cloud directory server, so that the cloud directory server can update the pre-saved content fragment storage information according to the correspondence .

Based on the above concept, an embodiment of the present invention also provides a cloud directory server, as shown in FIG. 7 , which is a schematic structural diagram of the cloud directory server, including:

A content fragment search request receiving unit 71, configured to receive a content fragment search request sent by a P2P node; the P2P node is in the P2P autonomous domain corresponding to the cloud directory server;

A target node determination unit 72, configured to determine the target node where the content segment requested by the content segment search request received by the content segment search request receiving unit 71 is located;

An information sending unit 73, configured to send the information of the target node determined by the target node determining unit 72 to the P2P node, so that the P2P node can obtain content fragments from the target node indicated by the determined information of the target node .

Wherein, the target node determining unit 72 may specifically include:

The search module 721 is configured to search for the P2P node where the content fragment is located in the P2P autonomous domain according to the pre-saved content fragment storage information; the content fragment storage information includes the information of the content fragment and the P2P node Correspondence;

The first target node determination module 722 is configured to determine the found P2P node as the target node when the search module 721 finds the P2P node where the content fragment is located in the P2P autonomous domain;

The second determination module 723 of the target node is configured to send the content fragment search request to the content management server when the search module 721 does not find the P2P node where the content fragment is located in the P2P autonomous domain, and the The content management server searches for the data node where the content fragment is located; and determines the data node found by the content management server as the target node.

Further, the cloud directory server may also include:

A correspondence relationship receiving unit 74, configured to receive the correspondence relationship between the P2P node and the content fragment sent by the P2P node;

The updating unit 75 is configured to update the pre-saved content segment storage information according to the corresponding relationship received by the corresponding relationship receiving unit 74 .

Based on the above idea, the embodiment of the present invention also provides a system for providing content services, as shown in Figure 8, which is a schematic structural diagram of the system, including: at least one P2P autonomous domain and a cloud corresponding to each P2P autonomous domain Directory server 81, and each P2P autonomous domain contains multiple P2P nodes 82, wherein:

The P2P node 82 is used to send a search request for content fragmentation to the cloud directory server 81 corresponding to the P2P autonomous domain where it is located when it cannot find the target node where the content fragmentation is located in the P2P autonomous domain where it is located; The information of the target node where the content fragment is fed back by the cloud directory server 81; sending a content service request to the target node indicated by the information of the target node to obtain the content fragment;

The cloud directory server 81 is configured to receive the content fragment search request sent by the P2P node 82; determine the target node where the content fragment requested by the content fragment search request is located; The information is sent to the P2P node 82.

Wherein, the system may also include: a content management server 83 and a data node 84; then

The cloud directory server 81 is specifically used for:

According to the pre-saved content fragment storage information, search the P2P node where the content fragment is located in the P2P autonomous domain; the content fragment storage information includes the corresponding relationship between the content fragment and the P2P node; when in the P2P autonomous domain When the P2P node where the content fragment is located is found in the P2P autonomous domain, the P2P node found is determined as the target node; when the P2P node where the content fragment is located is not found in the P2P autonomous domain node, the content fragment search request is sent to the content management server 83, and the content management server 83 searches for the data node 84 where the content fragment is located; and the data node found by the content management server 83 84 is determined as the target node.

Those skilled in the art should understand that the embodiments of the present invention may be provided as methods, systems, or computer program products. Accordingly, the present invention can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and combinations of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a Means for realizing the functions specified in one or more steps of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart flow or flows and/or block diagram block or blocks.

While preferred embodiments of the invention have been described, additional changes and modifications to these embodiments can be made by those skilled in the art once the basic inventive concept is appreciated. Therefore, it is intended that the appended claims be construed to cover the preferred embodiment as well as all changes and modifications which fall within the scope of the invention.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (16)

1. A method for providing content services, comprising: When the peer-to-peer network P2P node cannot find the target node where the content fragment is located in the P2P autonomous domain where it is located, it sends a content fragment search request to the cloud directory server corresponding to the P2P autonomous domain; receiving the information of the target node where the content fragment is located fed back by the cloud directory server; Sending a content service request to the target node indicated by the information of the target node, so as to obtain the content fragment. 2. The method according to claim 1, wherein the target node indicated by the information of the target node is: A P2P node in the P2P autonomous domain, or a data node outside the P2P autonomous domain. 3. The method according to claim 1, wherein, when the P2P node cannot find the target node where the content fragment is located in the P2P autonomous domain where it is located, it sends the content fragment search to the cloud directory server requests, including: When the P2P node fails to find the target node where the content fragment is located in the P2P autonomous domain where it is located within the preset time or hop count, it sends a content fragment search request to the cloud directory server. 4. The method according to any one of claims 1 to 3, further comprising: The P2P node stores the content fragments received from the target node; and Send the corresponding relationship between itself and the content segment to the cloud directory server, so that the cloud directory server can update the pre-saved storage information of the content segment according to the corresponding relationship. 5. A method for providing content services, comprising: The cloud directory server receives the content fragment search request sent by the P2P node; the P2P node is in the P2P autonomous domain corresponding to the cloud directory server; The cloud directory server determines the target node where the content fragment requested by the content fragment lookup request is located; and Sending the determined information of the target node to the P2P node, so that the P2P node can obtain content fragments from the target node indicated by the determined information of the target node. 6. The method according to claim 5, wherein the cloud directory server determines the target node where the content fragment requested by the content fragment search request is located, specifically comprising: The cloud directory server searches the P2P node where the content fragment is located in the P2P autonomous domain according to the pre-saved content fragment storage information; the content fragment storage information includes the corresponding relationship between the content fragment and the P2P node; When finding the P2P node where the content fragment is located in the P2P autonomous domain, determining the found P2P node as the target node; When the P2P node where the content fragment is located is not found in the P2P autonomous domain, the content fragment search request is sent to the content management server, and the content management server searches for the content fragment where the data nodes; and The data node found by the content management server is determined as the target node. 7. The method of claim 6, further comprising: receiving the correspondence between the P2P node and the content fragment sent by the P2P node; The pre-saved content segment storage information is updated according to the corresponding relationship. 8. A P2P node, characterized in that it comprises: A content fragment search request sending unit, used to send content fragments to the cloud directory server corresponding to the P2P autonomous domain when the peer-to-peer network P2P node cannot find the target node where the content fragments are located in the P2P autonomous domain where it is located find request; a receiving unit, configured to receive the information of the target node where the content fragment is fed back by the cloud directory server; The content service request sending unit is configured to send a content service request to the target node indicated by the information of the target node received by the receiving unit, so as to obtain the content fragment. 9. The P2P node according to claim 8, wherein the target node indicated by the information of the target node is: A P2P node in the P2P autonomous domain, or a data node outside the P2P autonomous domain. 10. The P2P node according to claim 8, wherein the content fragment search request sending unit is specifically used for: When the P2P node fails to find the target node where the content fragment is located in the P2P autonomous domain where it is located within the preset time or hop count, it sends a content fragment search request to the cloud directory server. 11. The P2P node according to any one of claims 8-10, wherein the P2P node further comprises: a storage unit, configured to store content fragments received from the target node; The correspondence sending unit is configured to send the correspondence between itself and the content segment to the cloud directory server, so that the cloud directory server can update the pre-saved storage information of the content segment according to the correspondence. 12. A cloud directory server, characterized in that, comprising: A content fragment search request receiving unit, configured to receive a content fragment search request sent by a P2P node; the P2P node is in the P2P autonomous domain corresponding to the cloud directory server; a target node determination unit, configured to determine the target node where the content segment requested by the content segment search request received by the content segment search request receiving unit is located; An information sending unit, configured to send the information of the target node determined by the target node determining unit to the P2P node, so that the P2P node can acquire content fragments from the target node indicated by the determined information of the target node. 13. The cloud directory server according to claim 12, wherein the target node determination unit specifically comprises: A search module, configured to search the P2P node where the content fragment is located in the P2P autonomous domain according to the pre-saved content fragment storage information; the content fragment storage information includes the correspondence between the content fragment and the P2P node relation; A target node first determination module, configured to determine the found P2P node as the target node when the search module finds the P2P node where the content fragment is located in the P2P autonomous domain; The second determination module of the target node is used to send the content fragment search request to the content management server when the search module does not find the P2P node where the content fragment is located in the P2P autonomous domain, and the The content management server searches for the data node where the content fragment is located; and determines the data node found by the content management server as the target node. 14. The cloud directory server according to claim 13, wherein the cloud directory server further comprises: a corresponding relationship receiving unit, configured to receive the corresponding relationship between the P2P node and the content fragment sent by the P2P node; An updating unit, configured to update the pre-saved content segment storage information according to the correspondence received by the correspondence receiving unit. 15. A system for providing content services, characterized in that it includes: at least one P2P autonomous domain and a cloud directory server corresponding to each P2P autonomous domain, and each P2P autonomous domain contains multiple P2P nodes, wherein: The P2P node is used to send a content fragment search request to the cloud directory server corresponding to the P2P autonomous domain where it is located when the target node where the content fragment is located cannot be found in the P2P autonomous domain where it is located; receive the cloud The information of the target node where the content fragment is fed back by the directory server; sending a content service request to the target node indicated by the information of the target node to obtain the content fragment; The cloud directory server is configured to receive the content fragment search request sent by the P2P node; determine the target node where the content fragment requested by the content fragment search request is located; and send the determined information of the target node to the P2P node. 16. The system according to claim 15, further comprising: a content management server and a data node; The cloud directory server is specifically used for: According to the pre-saved content fragment storage information, search the P2P node where the content fragment is located in the P2P autonomous domain; the content fragment storage information includes the corresponding relationship between the content fragment and the P2P node; when in the P2P autonomous domain When the P2P node where the content fragment is located is found in the P2P autonomous domain, the P2P node found is determined as the target node; when the P2P node where the content fragment is located is not found in the P2P autonomous domain node, the content fragment search request is sent to the content management server, and the content management server searches for the data node where the content fragment is located; and the data node found by the content management server is determined as the target node.