WO2019200751A1

WO2019200751A1 - Host and backup computer switching method, apparatus, computing device and storage medium

Info

Publication number: WO2019200751A1
Application number: PCT/CN2018/095501
Authority: WO
Inventors: 钟宇料; 桑池舫
Original assignee: 平安科技（深圳）有限公司
Priority date: 2018-04-20
Filing date: 2018-07-12
Publication date: 2019-10-24
Also published as: CN108762992A; CN108762992B

Abstract

The present application discloses a host and backup computer switching method, an apparatus, a computing device and a storage medium, the method comprising: determining whether a host computer running a community edition of Neo4j is malfunctioning; if yes, then switching from a first host computer connected to a first port of a router to a second host computer connected to a second port of the router. The present application utilizes a router to implement switching of a community edition of Neo4j from a host computer to a backup computer, addressing the issue in the prior art wherein a single host computer running the community edition of Neo4j is unable to continue being used if a malfunction occurs.

Description

Active/standby switching method, device, computer device and storage medium

This application claims priority to Chinese Patent Application No. 2018103614287 filed on Apr. 20, 2018, the entire disclosure of which is incorporated herein by reference. Combined in this application.

Technical field

The present application relates to the field of application of a graphics database, and in particular, to an active/standby switching method, apparatus, computer device, and storage medium.

Background technique

The existing community version of Neo4j (Neo4j graphics database) has only a single host. When it encounters a host failure, it can only discontinue the use of the community version of Neo4j, which seriously affects the user experience of the community version of Neo4j and affects the further promotion of the Neo4j community version. Moreover, the existing community version of Neo4j does not have a dual-system cluster system scheme, and it is difficult to achieve high availability. When the data request amount is large, accessing randomly distributed data is prone to cache miss, which affects the accuracy of the normal processing service of the community version Neo4j. .

technical problem

The main purpose of the present application is to provide an active/standby switching method, which aims to solve the technical problem that the existing community version of Neo4j does not have a dual-system cluster system, resulting in low availability.

Technical solution

The present application proposes an active/standby switching method, in which a routing relay device connects the first host and the second host of the community version Neo4j, the first host is connected to the first port of the routing relay device, and the second host and the second routing device are connected. Ports are connected, including:

Determine whether the first host supporting the community version Neo4j is faulty;

If yes, the first host connected to the first port of the routing relay device is switched to the second host connected to the second port of the routing relay device.

The present application further provides an active/standby switching device, where the first host and the second host are connected by a routing relay device, the first host is connected to the first port of the routing device, and the second host is connected to the second port of the routing device. ,include:

a first determining module, configured to determine whether a first host supporting the community version Neo4j is faulty;

The switching module is configured to switch, when the first host fails, the first host connected to the first port of the routing relay device to the second host connected to the second port of the routing relay device.

Preferably, the active/standby switching device includes:

a storage module, configured to store first running data of the first host supporting community version Neo4j running process;

And a transfer module, configured to transfer the first running data to the second host by using a specified manner to form second running data.

The application also provides a computer device comprising a memory and a processor, the memory storing computer readable instructions, the processor implementing the steps of the method when the computer readable instructions are executed.

The present application also provides a computer non-transitory readable storage medium having stored thereon computer readable instructions that, when executed by a processor, implement the steps of the methods described above.

Beneficial effect

The application has the beneficial technical effects: the present application implements the active/standby switchover of the community version of Neo4j through the routing relay device, and makes up for the existing community version of Neo4j with only a single host, and cannot continue to use the community version of Neo4j when a host failure occurs. This application passes the active and standby hosts. Switching to improve the usage continuity of the community version of Neo4j, improve the user experience, and the master and backup hosts reduce the impact of the active and standby hosts on the community version of Neo4j work process before and after the switchover through data backup and data synchronization. For the community version of Neo4j The continued use of it has far-reaching implications. The active/standby switchover of this application is completely automated, eliminating the need for personnel intervention, reducing costs, improving the timeliness of active/standby switchover, and improving efficiency. Moreover, this application improves the community version of Neo4j's fast response data request by creating an instance database, reducing cache misses and improving accuracy.

DRAWINGS

1 is a schematic flowchart of an active/standby switching method according to an embodiment of the present application;

2 is a schematic structural diagram of an active/standby switching device according to an embodiment of the present application;

3 is a schematic structural diagram of an active/standby switching device according to another embodiment of the present application;

4 is a schematic structural diagram of an active/standby switching device according to still another embodiment of the present application;

FIG. 5 is a schematic structural diagram of an active/standby switching device according to still another embodiment of the present application;

6 is a schematic structural diagram of an active/standby switching device according to still another embodiment of the present application;

7 is a schematic structural diagram of an active/standby switching device according to still another embodiment of the present application;

FIG. 8 is a schematic diagram showing the internal structure of a computer device according to an embodiment of the present application.

BEST MODE FOR CARRYING OUT THE INVENTION

Referring to FIG. 1 , an active/standby switching method of a community version of Neo4j according to an embodiment of the present invention connects a first host and a second host of a community version Neo4j through a routing relay device, and the first host is connected to a first port of a routing device, The second host is connected to the second port of the routing relay device. The embodiment of the present invention implements the switching and data transfer between the first host and the second host of the community version Neo4j through the routing relay device, including:

S1: Determine whether the first host supporting the community version Neo4j is faulty.

In this embodiment, the fault is identified by a preset fault identification condition. For example, the first host is continuously started three times or more according to the start command, and if it is not successfully turned on, it is determined to be a fault. This embodiment is a handover of the active and standby hosts of the community version Neo4j, and improves the high availability of the community version Neo4j. The community version Neo4j of this embodiment is a network-oriented database, based on an embedded, disk-based, Java persistence engine with full transaction characteristics. The community version of Neo4j of this embodiment stores structured data in a network. A more agile and fast development model can be applied. The above network refers to a flexible data structure, or mathematically called a graph. Neo4j Equivalent to a high-performance graph engine with all the features of a mature database. Compared with the enterprise version of Neo4j, the community version of Neo4j is cheaper and easier to promote, but the technical features are far less powerful than the enterprise version of Neo4j, because the community version of Neo4j There is no dual-system cluster system, only one host with specified power, so the existing community version of Neo4j does not include functions such as database and query management, and does not have high availability.

S2: If yes, the first host connected to the first port of the routing relay device is switched to the second host connected to the second port of the routing relay device.

In this step, the active/standby host of the community version Neo4j is switched through the route relay device set in the front end. When the first host has an abnormal fault, the host is switched to the second host in time to continue to support the smooth running of the community version of Neo4j, and the community version of Neo4j is improved. Operating efficiency. In this embodiment, the switching between the active and standby hosts of the community version Neo4j is implemented through a route relay device with equalization function, such as F5 (F5). Network's load balancing), Nginx (load balancing server developed by Igor Saysoyev), Keepalive (similar to layer3, 4 & 7 switch system software, that is, Layer 3, Layer 4 and Layer 7 automatic switching, can be used for switching between hosts, etc., to achieve fast switching, and further improve the switching effect of the community version of Neo4j master and backup. For example, when switching through F5, the switching operation can be completed in one minute, and the smoothness of the switching between the active and standby hosts of the community version Neo4j is improved, and the user experience is improved. In other embodiments of the present application, after manually detecting the first host failure, the F5 set at the front end is started, and the connection relationship between the host device and the F5 connection port is changed, thereby realizing the switching from the first host to the second host, to Confirm the fault judgment and improve the utilization of the host device.

Further, before step S1 of this embodiment, the method includes:

S11: Store first operation data of the first host supporting community version Neo4j running process.

In the running process, the community version Neo4j stores the running data in real time, such as in the memory of the first host, for data sharing, data analysis, and the like.

S12: Transfer the first running data to the second host by using a specified manner to form second running data.

In this embodiment, the first running data is transferred to the second host, so that the second host continues to support the normal operation of the community version of Neo4j on the basis of the first host processing business process, so as to avoid affecting the normal operation of the user. Use to improve the user experience. The specified method of this step includes but is not limited to FTP (File Transfer Protocol), SFTP (Secure File Transfer Protocol), SCP (Secure) Copy).

The specified mode in the embodiment of the present application is FTP, and the FTP is TCP/IP (Transmission). Short for Control Protocol/Internet Protocol, the Chinese translation is called Transmission Control Protocol/Internet Protocol, also known as Network Communication Protocol. The protocol for transferring files between two computers on the network belongs to the application layer of the network protocol group. The FTP client can issue commands to the server to download files, upload files, and create or change directories on the server. The FTP of this embodiment uses two TCP connections, one is a command link for transmitting commands between the FTP host and the server, and the other is a data link for uploading or downloading data. The FTP in this embodiment is based on the TCP protocol. Therefore, only the TCP protocol of the specified port needs to be released in the firewall setting. FTP allows plaintext transmission. Of course, it can also be set to have SSL (Secure). Sockets Layer Secure Sockets Layer) Encrypted FTP. The FTP working mode of this embodiment includes a PORT (active) mode and a PASV (passive passive mode). For example, the PORT (active) connection process is: the host sends a connection request to a designated port of the server, and the server accepts the connection and establishes a command link. When data needs to be transmitted, the host uses the PORT command on the command link to tell the server that a random port of 1024+ has been opened and can be connected. The server then sends a connection request from the designated port to the 1024+ random port on the host side, establishing a data link to transmit data. For example, the connection process of the PASV mode is: the host sends a connection request to the FTP port of the server, and the server accepts the connection and establishes a command link. When data needs to be transmitted, the server uses the PASV command on the command link to tell the host that a 1024+ random port has been opened and can be connected. The host then sends a connection request to the designated port of the server, establishing a data link to transfer the data. However, normal FTP only uses port 21 as a command transmission. The server and the host negotiate another random port for data transfer. In PASV mode, the server side needs to listen to another random port. If the server is behind a router or firewall, port mapping can be cumbersome because the data port number cannot be known in advance and cannot be mapped.

In the embodiment of the present application, the specified method is SSH (Secure Shell) for data transmission, and SSH is a security protocol based on the application layer and the transport layer. SSH of this embodiment There are three main components: the transport layer protocol SSH-TRANS, the user authentication protocol SSH-USERAUTH, and the connection protocol SSH-CONNECT. The SSH protocol can effectively prevent information leakage during remote management and provide security. The SSH in this embodiment includes an SFTP secure file transfer subsystem, and SFTP can provide a secure encryption method for transmitting files, SFTP. Has almost the same syntax and functionality as FTP above. The SFTP of this embodiment does not have a separate daemon process, and the SSH daemon must be used to complete the corresponding connection operation. SFTP uses encryption to transmit authentication information and transmitted data, which is very secure. However, due to the use of encryption/decryption technology, the transmission efficiency is much lower than that of ordinary FTP. When the network security requirements are higher, SFTP is used instead of FTP.

In this embodiment, the first operation data is transferred to the second host through the SCP, and the operation is simpler, more convenient, and the efficiency of data synchronization sharing is improved. The SCP of this embodiment is based on SSH login and can be used for remote file copying, and is more suitable for synchronizing the first running data to the second host, and the entire copying process is encrypted. For example, to synchronize the current file of the first running data to the remote second host, the format of the command copied from the local to the remote is: scp local_file remote_username@remote_ip:remote_folder or scp local_file remote_username@remote_ip:remote_file or scp local_file Remote_ip:remote_folder or scp local_file remote_ip:remote_file, the user name is specified in the first and second command formats. The password needs to be entered after the command is executed. The first command format only specifies the remote directory, and the file name does not change. The command format specifies the file name; the third and fourth command formats do not specify a user name, the user name and password are required after the command is executed, and the third command format specifies only the remote directory, the file name does not change, and the fourth command The format specifies the file name; from remote copy to local, as long as the command will be copied locally to the remote The parameter switching sequence in the last two command formats can be implemented. The remote and local in this embodiment includes data synchronization between the remote server and the local server, and also includes data synchronization between the remote host terminal and the local host terminal. SCP of this embodiment /SFTP is open source protocol free of charge, unlike FTP security or copyright issues, and SCP / SFTP transmission software is free and open source, easy to develop a variety of extensions and application components.

In another embodiment of the present application, after step S2, the method includes:

S21: Determine an intersection of the data of the second running data and the first running data.

The data intersection of this step is obtained by comparing the number of nodes of the first operational data with the second operational data. In other embodiments of the present application, the data intersection may also be obtained by other methods such as the number of data bytes. The community version Neo4j of this embodiment is a high performance NOSQL (Not Only SQL) graph database, which stores structured data on the network. In the NOSQL graph database, there are two concepts: node set and node. The data display in the NOSQL graph database does not use a node set, but an independent node. The NOSQL of this embodiment has the following features: no need to define a data pattern in advance, a predefined table structure, each record in the data may have different attributes and formats, and when inserting data, it is not necessary to define a pattern in advance; The all-sharing architecture in the storage area network where all data is stored, NOSQL divides the data and stores it on each local server, because the performance of reading data from the local disk is better than the performance of reading data through the network transmission, thereby improving the system. Performance; can dynamically add or delete nodes while the system is running, no downtime maintenance, data can be automatically migrated; compared to the data stored in the same node, NOSQL database needs to partition the data, spread the records in multiple Above the node, and the partition has to be replicated at the same time, which improves the parallel performance and guarantees that there is no single point of failure; and RAID (Redundant) Arrays of Independent Disks (disk array) storage system is different, the replication in NOSQL is based on asynchronous replication of the log, the data is written to the node as soon as possible, reducing network transmission delay. The NOSQL database does not have a unified architecture. The difference between the two NOSQL databases is far more than the difference between the two relational databases. However, NOSQL has its own advantages. The NOSQL graph database of this embodiment is particularly suitable for the community version Neo4j. The data of the NOSQL graph database is synchronized between the first host and the second host, and is completed according to the data of the copy node.

S22: Determine a starting point of the running process of the second host according to the data intersection.

In this embodiment, the starting start label of the second host, that is, the starting point of the running process of the second host, is determined by the data intersection of the first running data and the second running data. For example, the first running data includes node A, node B, node C, and node D; and the second running data includes node A, node B, and node C, and further determines whether the data of node C is complete, and if so, the second The host starts from the service processing performed by the first host at the node C or at the service data location corresponding to the node C, and continues to support the operation of the community version Neo4j; if it is determined that the data of the node C is incomplete, it is determined whether The data information at the end of the data of the node C can be obtained. If the data information at the end of the data of the node C can be obtained, the second host is terminated from the first host at the end of the data of the node C or before the data of the node C is terminated. The service processing performed at the corresponding service data location at the moment is started; if the data information at the data termination of the node C is not available, the second host performs the corresponding service data from the first host at any point before the node C. The business process begins. The starting node selected by the second host can continue to support the normal operation of the community version Neo4j, and does not affect the normal use of the user. There is a time delay in the data sharing between the first host and the second host. The data node in the second running data is data that has been processed by the service, and the node selected by the second host may be the node data just connected as the starting point. Or, it is just the node data before the node is connected as the starting point.

In still another embodiment of the present application, after step S2, the method includes:

S23: Record the access data of the community version Neo4j and the access frequency corresponding to the access data.

The community version Neo4j of this embodiment records the most recently accessed data by caching.

S24: Acquire, in the access data, the high frequency access data whose access frequency is greater than a preset threshold.

For example, the preset threshold of this step is, for example, three times of access, and the number of accesses is greater than three times, which is high frequency access data.

S25: Form an instance database and store by summarizing the instance scenarios corresponding to the high frequency secondary access data and the high frequency secondary access data.

The community version Neo4j of this embodiment is a graphics database, and the data is not stored in a table or a collection, but is saved as a node and a relationship between nodes. In the community version of Neo4j, nodes and relationships can contain attributes that hold values, zero or more tags (such as Author or Book) for the node, and each relationship corresponds to a type (such as WROTE or FRIEND_OF), the relationship is always Point from one node to another (but can do so without regard to directivity). The community version of Neo4j of this embodiment comes with a set of easy-to-learn query language (called Cypher) that does not use Schema (a collection of database objects, a user generally corresponds to a Schema), so it can meet any form of requirements. In this embodiment, the high-frequency access data is aggregated according to the relevance of the scenario, and a database of the instance scenario is formed and stored, so that the local data of the database is gradually modularized and modeled, so as to improve the community version of Neo4j rapid response data request, and Preventing the random distribution of data from being cached when the number of requests is very large. The above example scenario includes a summary of scenario scenarios based on data types, such as summarizing data related to medical information, hospital information, case introduction, medical equipment, etc. into the medical industry. Example scenario. Compared with the relational database, the community version Neo4j of this embodiment is much faster to query highly correlated data (graphic data). The entity and relationship structure of the community version Neo4j of this embodiment is very natural to meet the human intuitive feeling, and supports ACID (abbreviation of four basic elements of database transaction correct execution, including: atomic Atomicity, Consistency Consistency, Isolation Isolation) Transaction operation provides a high-availability model to support large-volume data queries, support for backup, data locality, and redundancy, providing a visual query console to avoid staff fatigue. In this embodiment, an instance database corresponding to the access data is aggregated to form an instance database and stored, so as to improve the community version of Neo4j fast response data request, and prevent a random distribution of data from being cached when the request amount is very large. .

Further, after step S25, the method further includes:

S26: Determine whether the instance scenario currently running by the second host has stored a backup.

Improve the efficiency of calling data by judging whether the corresponding backup database exists in the currently running instance scenario. For example, in this embodiment, the similarity between the two instance scenarios is determined by using the classification label of the example scenario. For example, if the instance scenario label shows that the two instance scenarios are all medical fields, the determination is similar. If one scene label is displayed as a medical field and another scene label is displayed as a movie field, the determination is not similar. The scene label classification in this embodiment may further refine the classification according to requirements to improve the reliability of calling data according to the instance scene label. The example scene classification label of the embodiment may be classified by the feature of the picture component of the instance scene acquired by the convolutional neural network, and the similarity of the instance scene is determined according to the feature similarity of the picture component. In this embodiment, it is preferable to determine the feature similarity of the two picture constituent elements according to the Euclidean distance, and further determine the similarity between the two example scenes.

S27: If yes, the access data matching the currently running instance scenario is invoked.

For example, if the currently running instance scenario is in the medical field, the tag is data in the medical field, which increases the speed.

S28: Monitor the fault alarm of the first host.

In this embodiment, a monitoring function is set on the application module that connects the first host and the second host to monitor the fault alarm of the first host. For example, after the first host fails, the application module receives the fault alarm information. For example, by monitoring the heartbeat packet for monitoring, and not receiving the heartbeat monitoring feedback information of the first host, determining that the first host is faulty, the fault alarm of the embodiment includes an audible fault alarm, such as a fault whistle, etc.; Alarm, fault light or flashing light; no performance fault alarm, such as no heartbeat or no feedback signal.

S29: The first running data is synchronized to the node information of the second host when the fault alarm is marked.

In this embodiment, when the first host failure is detected, the data synchronization status of the first host and the second host and the data request status of the community version Neo4j are simultaneously monitored, so as to switch to the second host, the connection is smoother. A host continues to support the operation and application of the community version of Neo4j. In this embodiment, the data synchronization status of the first host and the second host is monitored by monitoring the change information of the data node in the data synchronization state. The node information of this step includes but is not limited to node attributes, associations with other nodes, and node search paths.

S30: transmitting the node information to the second host, to determine a starting point of the running process of the second host according to the node information.

The node information is transmitted to the second host, so that the second host quickly recognizes the difference of the synchronization data, and selects a more optimized manner to connect the work of the first host. The specific determination method of the starting point of the running process of the second host in this embodiment is the same as step S22.

In addition to the above applications, in an embodiment of the present application, the community version of Neo4j can also handle "big data" by providing information about an entity and its neighboring data relationships (eg, you can provide a web page to return its results), such as The number of categories of books is calculated according to the location (city) where the author is located, and a different set of columns is returned by using the same design pattern. For example, a community-based version of Neo4j's interactive rendering of a document portal is based on a simple text file that describes the entire data model, architecture, and use case queries in textual descriptions and images, supporting online execution and maintaining visualization. The portal provides a list that allows users to view the details of each list.

In the embodiment of the present application, the active/standby switchover of the community version of Neo4j is implemented by the route relay device, and the existing community version of Neo4j has only a single host. When the host fails, the community version of Neo4j cannot be used. Improve the use of the community version of Neo4j to improve the user experience, and the master and backup hosts through data backup and data synchronization, reduce the impact of the active and standby hosts on the community version of Neo4j work process before and after the switch, the continuation of the community version of Neo4j Use has far-reaching implications. The active/standby host switching in the embodiment of the present application is completely automated, and no personnel intervention is required, which reduces costs, improves the timeliness of the active/standby switchover, and improves efficiency. Moreover, the embodiment of the present application improves the community version of the Neo4j fast response data request by reducing the instance database. Missing caches improve accuracy.

Referring to FIG. 2, the primary and secondary switching devices of the embodiment are connected to the first host and the second host of the community version Neo4j through a routing relay device, and the first host is connected to the first port of the routing device, and the second host and the route are connected. The second port of the transit device is connected to each other. The embodiment of the present invention implements the switching and data transfer between the first host and the second host of the community version Neo4j through the routing relay device, including:

The first judging module 1 is configured to determine whether the first host supporting the community version Neo4j is faulty.

This embodiment is identified by the preset fault identification condition in the first judging module 1. For example, the first host is continuously started three times or more according to the start command, and if it is not successfully turned on, it is determined to be a fault. This embodiment is a handover of the active and standby hosts of the community version Neo4j, and improves the high availability of the community version Neo4j. The community version Neo4j of this embodiment is a network-oriented database, based on an embedded, disk-based, Java persistence engine with full transaction characteristics. The community version of Neo4j of this embodiment stores structured data in a network. A more agile and fast development model can be applied. The above network refers to a flexible data structure, or mathematically called a graph. Neo4j Equivalent to a high-performance graph engine with all the features of a mature database. Compared with the enterprise version of Neo4j, the community version of Neo4j is cheaper and easier to promote, but the technical features are far less powerful than the enterprise version of Neo4j, because the community version of Neo4j There is no dual-system cluster system, only one host with specified power, so the existing community version of Neo4j does not include functions such as database and query management, and does not have high availability.

The switching module 2 is configured to switch, when the first host fails, the first host connected to the first port of the routing relay device to the second host connected to the second port of the routing relay device.

In this embodiment, the switching between the active and standby hosts of the community version Neo4j is implemented by the routing relay device disposed in the front end of the switching module 2, and when the first host has an abnormal fault, the second host is switched to the second host to continue to support the community version of Neo4j. Run to improve the operational efficiency of the community version of Neo4j. In this embodiment, the switching between the active and standby hosts of the community version Neo4j is implemented through a route relay device with equalization function, such as F5 (F5). Network's load balancing), Nginx (load balancing server developed by Igor Saysoyev), Keepalive (similar to layer3, 4 & 7 switch system software, ie, Layer 3, Layer 4 and Layer 7 automatic switching software, can be used for switching between hosts, etc., to achieve fast switching, and further improve the effect of the community version of Neo4j master and backup machine switching . For example, when switching through F5, the switching operation can be completed in one minute, and the smoothness of the switching between the active and standby hosts of the community version Neo4j is improved, and the user experience is improved. In other embodiments of the present application, after manually detecting the first host failure, the F5 set at the front end is started, and the connection relationship between the host device and the F5 connection port is changed, thereby realizing the switching from the first host to the second host, to Confirm the fault judgment and improve the utilization of the host device.

Referring to FIG. 3, an active/standby switching device of another embodiment of the present application includes:

The storage module 11 is configured to store first running data of the first host supporting community version Neo4j running process.

During the running of the community version Neo4j of this embodiment, the running data is stored in real time through the storage module 11, for example, stored in the memory of the first host, for data sharing, data analysis, and the like.

The transferring module 12 is configured to transfer the first running data to the second host by using a specified manner to form second running data.

In this embodiment, the first running data is synchronized to the second host by the transfer module 12, so that the second host continues to support the normal operation of the community version Neo4j on the basis of the first host processing business process to avoid the influence. The normal use of the user improves the user experience. The specified method of this step includes but is not limited to FTP (File Transfer Protocol), SFTP (Secure File Transfer Protocol), SCP (Secure) Copy).

Referring to FIG. 4, an active/standby switching device according to still another embodiment of the present application includes:

The second determining module 21 is configured to determine an intersection of the data of the second running data and the first running data.

The data intersection of this embodiment is obtained by comparing the number of nodes of the first operational data with the second operational data. In other embodiments of the present application, the data intersection may also be obtained by other methods such as the number of data bytes. The community version Neo4j of this embodiment is a high performance NOSQL (Not Only SQL) graph database, which stores structured data on the network. In the NOSQL graph database, there are two concepts: node set and node. The data display in the NOSQL graph database does not use a node set, but an independent node. The NOSQL of this embodiment has the following features: no need to define a data pattern in advance, a predefined table structure, each record in the data may have different attributes and formats, and when inserting data, it is not necessary to define a pattern in advance; The all-sharing architecture in the storage area network where all data is stored, NOSQL divides the data and stores it on each local server, because the performance of reading data from the local disk is better than the performance of reading data through the network transmission, thereby improving the system. Performance; can dynamically add or delete nodes while the system is running, no downtime maintenance, data can be automatically migrated; compared to the data stored in the same node, NOSQL database needs to partition the data, spread the records in multiple Above the node, and the partition has to be replicated at the same time, which improves the parallel performance and guarantees that there is no single point of failure; and RAID (Redundant) Arrays of Independent Disks (disk array) storage system is different, the replication in NOSQL is based on asynchronous replication of the log, the data is written to the node as soon as possible, reducing network transmission delay. The NOSQL database does not have a unified architecture. The difference between the two NOSQL databases is far more than the difference between the two relational databases. However, NOSQL has its own advantages. The NOSQL graph database of this embodiment is particularly suitable for the community version Neo4j. The data of the NOSQL graph database is synchronized between the first host and the second host, and is completed according to the data of the copy node.

The determining module 22 is configured to determine a starting point of the running process of the second host according to the data intersection.

In this embodiment, the determining module 22 determines the starting start label of the second host, that is, the starting point of the running process of the second host, according to the data intersection of the first running data and the second running data. For example, the first running data includes node A, node B, node C, and node D; and the second running data includes node A, node B, and node C, and further determines whether the data of node C is complete, and if so, the second The host starts from the service processing performed by the first host at the node C or at the service data location corresponding to the node C, and continues to support the operation of the community version Neo4j; if it is determined that the data of the node C is incomplete, it is determined whether The data information at the end of the data of the node C can be obtained. If the data information at the end of the data of the node C can be obtained, the second host is terminated from the first host at the end of the data of the node C or before the data of the node C is terminated. The service processing performed at the corresponding service data location at the moment is started; if the data information at the data termination of the node C is not available, the second host performs the corresponding service data from the first host at any point before the node C. The business process begins. Other embodiments of the present application select a service state corresponding to a service state performed at the node A from the first host or from any point in time between the node A and the node C as a starting point. The starting node selected by the second host can continue to support the normal operation of the community version Neo4j, and does not affect the normal use of the user. There is a time delay in the data sharing between the first host and the second host. The data node in the second running data is data that has been processed by the service, and the node selected by the second host may be the node data just connected as the starting point. Or, it is just the node data before the node is connected as the starting point.

Referring to FIG. 5, an active/standby switching device according to still another embodiment of the present application includes:

The recording module 23 is configured to record the access data of the community version Neo4j and the access frequency corresponding to the access data.

The community version Neo4j of this embodiment caches the most recently accessed data through the recording module 23.

The obtaining module 24 is configured to obtain, in the access data, the high frequency access data whose access frequency is greater than a preset threshold.

For example, the preset threshold of the embodiment is, for example, three times of access, and the number of accesses is greater than three times, which is high frequency access data.

The forming module 25 is configured to form an instance database and store the instance scenario corresponding to the access data by collecting the instance data corresponding to the access data if the access frequency is greater than the preset threshold.

The community version Neo4j of this embodiment is a graphics database, and the data is not stored in a table or a collection, but is saved as a node and a relationship between nodes. In the community version of Neo4j, nodes and relationships can contain attributes that hold values, zero or more tags (such as Author or Book) for the node, and each relationship corresponds to a type (such as WROTE or FRIEND_OF), the relationship is always Point from one node to another (but can do so without regard to directivity). The community version of Neo4j of this embodiment comes with a set of easy-to-learn query language (called Cypher) that does not use Schema (a collection of database objects, a user generally corresponds to a Schema), so it can meet any form of requirements. In this embodiment, the high-frequency access data is aggregated according to the relevance of the scenario, and a database of the instance scenario is formed and stored, so that the local data of the database is gradually modularized and modeled, so as to improve the community version of Neo4j rapid response data request, and Preventing the random distribution of data from being cached when the number of requests is very large. The above example scenario includes a summary of scenario scenarios based on data types, such as summarizing data related to medical information, hospital information, case introduction, medical equipment, etc. into the medical industry. Example scenario. Compared with the relational database, the community version Neo4j of this embodiment is much faster to query highly correlated data (graphic data). The entity and relationship structure of the community version Neo4j of this embodiment is very natural to meet the human intuitive feeling, and supports ACID (abbreviation of four basic elements of database transaction correct execution, including: atomic Atomicity, Consistency Consistency, Isolation Isolation) Transaction operation, providing a high-availability model to support large-volume data queries, support for backup, data locality, and redundancy, providing a visual query console to avoid staff fatigue. In this embodiment, an example scenario corresponding to the access data and the access data is summarized by the forming module 25, and an instance database is formed and stored to improve the community version Neo4j fast response data request, and the data is randomly distributed when the request amount is very large. A cache miss has occurred.

Referring to FIG. 6, the active/standby switching device of another embodiment of the present application further includes:

The third determining module 26 is configured to determine whether the instance scenario currently running by the second host has stored a backup.

The third determining module 26 determines whether the corresponding running database exists in the currently running instance scenario, and improves the efficiency of calling data. For example, in this embodiment, the similarity between the two instance scenarios is determined by using the classification label of the example scenario. For example, if the instance scenario label shows that the two instance scenarios are all medical fields, the determination is similar. If one scene label is displayed as a medical field and another scene label is displayed as a movie field, the determination is not similar. The scene label classification in this embodiment may further refine the classification according to requirements to improve the reliability of calling data according to the instance scene label. The example scene classification label of the embodiment may be classified by the feature of the picture component of the instance scene acquired by the convolutional neural network, and the similarity of the instance scene is determined according to the feature similarity of the picture component. In this embodiment, it is preferable to determine the feature similarity of the two picture constituent elements according to the Euclidean distance, and further determine the similarity between the two example scenes.

The calling module 27 is configured to invoke the access data that matches the currently running instance scenario if the backup has been stored.

For example, if the currently running instance scenario is the medical field, the calling module 27 calls the data in the medical field to increase the speed.

Referring to FIG. 7, an active/standby switching device according to another embodiment of the present application includes:

The monitoring module 28 is configured to monitor a fault alarm of the first host.

In this embodiment, on the application module that connects the first host and the second host, a monitoring module 28 with a monitoring function is provided to monitor the fault alarm of the first host. For example, after the first host fails, the application module receives the fault alarm information. For example, by monitoring the heartbeat packet for monitoring, and not receiving the heartbeat monitoring feedback information of the first host, determining that the first host is faulty, the fault alarm of the embodiment includes an audible fault alarm, such as a fault whistle, etc.; Alarm, fault light or flashing light; no performance fault alarm, such as no heartbeat or no feedback signal.

The marking module 29 is configured to synchronize the first running data to the node information of the second host when the fault alarm is marked.

In this embodiment, when the monitoring module 28 detects that the first host is faulty, the data synchronization status of the first host and the second host is simultaneously monitored and marked by the marking module 29, and the data request status of the community version Neo4j is monitored to switch to the second. After the host, the first host is smoothly connected to continue to support the operation and application of the community version of Neo4j. In this embodiment, the data synchronization status of the first host and the second host is monitored by monitoring the change information of the data node in the data synchronization state. The node information of this step includes but is not limited to node attributes, associations with other nodes, and node search paths.

The transmission module 30 is configured to transmit the node information to the second host, to determine a starting point of the running process of the second host according to the node information.

In this embodiment, the node information is transmitted to the second host through the transmission module 30, so that the second host quickly identifies the difference of the synchronization data, and selects a more optimized manner to connect the work of the first host. The specific determination method of the starting point of the running process of the second host in this embodiment is the same as the determining module 22.

Referring to FIG. 8, a computer device is provided in the embodiment of the present application. The computer device may be a server, and its internal structure may be as shown in FIG. 9. The computer device includes a processor, memory, network interface, and database connected by a system bus. Among them, the computer designed processor is used to provide calculation and control capabilities. The memory of the computer device includes a non-volatile storage medium, an internal memory. The non-volatile storage medium stores an operating system, computer readable instructions, and a database. The memory provides an environment for the operation of operating systems and computer readable instructions in a non-volatile storage medium. The database of the computer device is used to store data such as active/standby switchover. The network interface of the computer device is used to communicate with an external terminal via a network connection. The computer readable instructions, when executed, perform the flow of an embodiment of the methods described above. It will be understood by those skilled in the art that the structure shown in FIG. 9 is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation of the computer device to which the present application is applied.

An embodiment of the present application also provides a computer non-volatile readable storage medium having stored thereon computer readable instructions that, when executed, perform the processes of the embodiments of the methods described above. The above description is only the preferred embodiment of the present application, and is not intended to limit the scope of the patent application, and the equivalent structure or equivalent process transformations made by the specification and the drawings of the present application, or directly or indirectly applied to other related The technical field is equally included in the scope of patent protection of the present application.

Claims

An active/standby switching method is characterized in that: the first host and the second host of the community version Neo4j are connected by the routing relay device, the first host is connected to the first port of the routing relay device, and the second host and the routing relay device are connected. Two ports are connected, including:

Determine whether the first host supporting the community version Neo4j is faulty;

If yes, the first host connected to the first port of the routing relay device is switched to the second host connected to the second port of the routing relay device.
The master/slave switching method according to claim 1, wherein the step of determining whether the first host supporting the community version Neo4j is faulty comprises:

Storing the first running data of the running process of the first host supporting community version Neo4j;

Transferring the first operational data to the second host in a specified manner to form second operational data.
The active/standby switching method according to claim 2, wherein after the step of switching the first host connected to the first port of the routing relay device to the second host connected to the second port of the routing relay device, :

Determining an intersection of the data of the second running data and the first running data;

Determining a starting point of the running process of the second host according to the data intersection.
The active/standby switching method according to claim 1, wherein after the step of switching the first host connected to the first port of the routing relay device to the second host connected to the second port of the routing relay device, :

Recording access frequency of the second host and access frequency corresponding to the access data;

Obtaining, in the access data, the high frequency access data whose access frequency is greater than a preset threshold;

An instance database is formed and stored by summarizing the instance scenarios corresponding to the high frequency secondary access data and the high frequency secondary access data.
The master/slave switching method according to claim 4, wherein the step of summing the high frequency secondary access data and the high frequency secondary access data to form an instance database and storing the steps include:

Determining whether the instance scenario currently running by the second host has stored a backup;

If so, the access data that matches the currently running instance scenario is invoked.
The active/standby switching method according to claim 2, wherein after the step of switching the first host connected to the first port of the routing relay device to the second host connected to the second port of the routing relay device, :

Monitoring a fault alarm of the first host;

The first running data is synchronized to the node information of the second host when the fault alarm is marked;

Transmitting the node information to the second host to determine a starting point of the running process of the second host according to the node information.
An active/standby switching device is characterized in that: the first host and the second host of the community version Neo4j are connected by the routing relay device, the first host is connected to the first port of the routing device, and the second host and the routing device are connected. The two ports are connected, and the device includes:

a first determining module, configured to determine whether a first host supporting the community version Neo4j is faulty;

The switching module is configured to switch, when the first host fails, the first host connected to the first port of the routing relay device to the second host connected to the second port of the routing relay device.
The master/slave switching device according to claim 7, comprising:

a storage module, configured to store first running data of the first host supporting community version Neo4j running process;

And a transfer module, configured to transfer the first running data to the second host by using a specified manner to form second running data.
The master/slave switching device according to claim 8, comprising:

a second determining module, configured to determine an intersection of the data of the second running data and the first running data;

And a determining module, configured to determine a starting point of the running process of the second host according to the data intersection.
The master/slave switching device according to claim 7, comprising:

a recording module, configured to record access data of the second host and an access frequency corresponding to the access data;

An obtaining module, configured to acquire, in the access data, the high frequency access data whose access frequency is greater than a preset threshold;

The forming module is configured to form an instance database and store the instance scenario corresponding to the high frequency secondary access data by summarizing the instance scenarios corresponding to the high frequency secondary access data if the access frequency is greater than a preset threshold.
The master/slave switching device according to claim 10, further comprising:

a third determining module, configured to determine whether an instance scenario currently running by the second host has stored a backup;

The calling module is configured to call the access data that matches the currently running instance scenario if the backup has been stored.
The master/slave switching device according to claim 8, comprising:

a monitoring module, configured to monitor a fault alarm of the first host;

a marking module, configured to: when the fault alarm is marked, the first running data is synchronized to the node information of the second host;

And a transmission module, configured to transmit the node information to the second host, to determine a starting point of the running process of the second host according to the node information.
A computer device, comprising a memory and a processor, wherein the memory stores computer readable instructions, wherein the processor implements an active/standby switching method when the computer readable instructions are executed, and connects to a community version through a routing relay device The first host and the second host of the Neo4j, the first host is connected to the first port of the routing device, and the second host is connected to the second port of the routing device, and the method includes:

Determine whether the first host supporting the community version Neo4j is faulty;

If yes, the first host connected to the first port of the routing relay device is switched to the second host connected to the second port of the routing relay device.
The computer device according to claim 13, wherein the step of determining whether the first host supporting the community version Neo4j is faulty comprises:

Storing the first running data of the running process of the first host supporting community version Neo4j;

Transferring the first operational data to the second host in a specified manner to form second operational data.
The computer device according to claim 14, wherein the step of switching the first host connected to the first port of the routing relay device to the second host connected to the second port of the routing relay device comprises:

Determining an intersection of the data of the second running data and the first running data;

Determining a starting point of the running process of the second host according to the data intersection.
The computer device according to claim 1, wherein the step of switching the first host connected to the first port of the routing relay device to the second host connected to the second port of the routing relay device comprises:

Recording access frequency of the second host and access frequency corresponding to the access data;

Obtaining, in the access data, the high frequency access data whose access frequency is greater than a preset threshold;

An instance database is formed and stored by summarizing the instance scenarios corresponding to the high frequency secondary access data and the high frequency secondary access data.
A computer non-readable readable storage medium having stored thereon computer readable instructions, wherein the computer readable instructions are implemented by a processor to implement an active/standby switching method, and the community relay device is connected to the community version Neo4j The first host and the second host are connected to the first port of the routing device, and the second host is connected to the second port of the routing device. The method includes:

Determine whether the first host supporting the community version Neo4j is faulty;

If yes, the first host connected to the first port of the routing relay device is switched to the second host connected to the second port of the routing relay device.
The computer non-volatile readable storage medium according to claim 17, wherein the step of determining whether the first host supporting the community version Neo4j is faulty comprises:

Storing the first running data of the running process of the first host supporting community version Neo4j;

Transferring the first operational data to the second host in a specified manner to form second operational data.
The computer non-volatile readable storage medium according to claim 18, wherein said switching the first host connected to the first port of the routing relay device to the second host connected to the second port of the routing relay device After the steps, including:

Determining an intersection of the data of the second running data and the first running data;

Determining a starting point of the running process of the second host according to the data intersection.
The computer non-volatile readable storage medium according to claim 17, wherein the first host connected to the first port of the routing relay device is switched to the second host connected to the second port of the routing relay device After the steps, including:

Recording access frequency of the second host and access frequency corresponding to the access data;

Obtaining, in the access data, the high frequency access data whose access frequency is greater than a preset threshold;

An instance database is formed and stored by summarizing the instance scenarios corresponding to the high frequency secondary access data and the high frequency secondary access data.