CN111031341A - Heartbeat-based dual-computer hot standby method - Google Patents
Heartbeat-based dual-computer hot standby method Download PDFInfo
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- CN111031341A CN111031341A CN201911144221.5A CN201911144221A CN111031341A CN 111031341 A CN111031341 A CN 111031341A CN 201911144221 A CN201911144221 A CN 201911144221A CN 111031341 A CN111031341 A CN 111031341A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/231—Content storage operation, e.g. caching movies for short term storage, replicating data over plural servers, prioritizing data for deletion
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/16—Error detection or correction of the data by redundancy in hardware
- G06F11/1658—Data re-synchronization of a redundant component, or initial sync of replacement, additional or spare unit
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/24—Monitoring of processes or resources, e.g. monitoring of server load, available bandwidth, upstream requests
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/643—Communication protocols
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Abstract
The invention discloses a heartbeat-based dual-computer hot standby method. The system comprises two director machines and a live broadcast server, wherein the director machines are connected with the live broadcast server, the most core of each director machine comprises two parts, a heartbeat monitoring part and a resource taking-over part, and the system specifically comprises the following steps: (1) the heartbeat monitoring part is carried out through a wireless network card link, and the main director sends a message at regular time to tell the current state of the standby director; (2) if the heartbeat message sent by the main director is not received within the appointed time, the opposite side is considered to have a fault, and at the moment, a resource takeover part on the standby director is started to take over the live broadcast service running on the main director to be pushed to the live broadcast server. The invention has the beneficial effects that: the method can quickly recover normal live broadcast service, has short time for switching the main live broadcast service and the standby live broadcast service, is high in speed, does not need manual intervention for automatic switching, ensures uninterrupted real-time operation of the live broadcast service, and increases guarantee for the safety and the real-time performance of the live broadcast.
Description
Technical Field
The invention relates to the technical field of data processing, in particular to a heartbeat-based dual-computer hot standby method.
Background
The dual-computer hot standby system is an important technology in the field of high availability, the high availability of data and the continuous operation capability of the system are extremely important, the server is important equipment for storing data by enterprises and public institutions, if the server cannot operate normally due to faults of the server, service pause is caused, and the faults of the server can be caused by various reasons, such as equipment faults, operating system faults, software system faults and the like. Generally speaking, in the case of a technician on site, it may take several minutes, hours or even days to restore a server normally, and from practical experience, it often takes more than several hours unless the server is simply restarted (a potential hazard still exists), whereas if the technician is not on site, the time to restore service is longer, and for some important systems, it is difficult for the user to tolerate such a long service interruption when a failure occurs in the live broadcast process. Therefore, the dual-computer hot standby is needed to avoid long-time service interruption, so that the security of the system is ensured, and reliable service is provided.
The development of the working scheme of the dual-computer hot standby is as follows:
based on a shared storage (disk array) mode, two servers and one shared storage device (generally, a shared disk array cabinet) are required in a shared storage dual-computer hot-standby scheme, the shared storage device is simultaneously connected to the two servers, user service data are stored in the shared storage device, a main server serves the external service and accesses the shared storage device to read and write the data, once the main server fails (for example, an operating system is down, the server is powered down unexpectedly, a network failure and the like), ServHA dual-computer hot-standby software automatically switches a service application to a standby server and takes over the access right of the shared storage device to continue to serve the external service, expensive storage devices are required to be introduced in the mode, the cost is increased, and only one copy of data is in the disk array.
The full redundancy mode is dual-computer dual storage, and in order to realize storage redundancy, high storage availability is accepted by more and more users. The scheme needs two servers and two shared disk array cabinets, wherein each server is connected with two disk array cabinets at the same time, each disk array cabinet is connected with two servers at the same time, servHA double-cabinet software (servHA DS Mirror) is responsible for writing data into the two disk array cabinets in real time, the data of the two disk array cabinets are ensured to be completely consistent, when the servers read the data, the data can be simultaneously read from the two disk array cabinets, the reading efficiency is improved, once the main server fails (such as shutdown of an operating system, accidental power failure of the server, network failure and the like), the servHA double-hot-standby software automatically switches a service application to a standby server to continue to serve the outside, the service application is protected to run uninterruptedly, when one disk array cabinet fails, the servHA double-hot-standby software can isolate the failed disk array cabinet, the service in the whole process can continue to serve by using the single disk cabinet without interruption, the mode data is stored in double parts, one part of each of the two disk array cabinets has high data safety, and the data is written into the two disk array cabinets in real time through the storage link, so that higher data throughput can be borne, but the hardware cost is higher.
The dual-server hot-standby can be realized by only two servers in a copying manner, the two servers utilize local disks to store service data, the servHA Mirror dual-server hot-standby software (servHA Mirror) is responsible for synchronizing the data of the two servers in real time to ensure that the data of the two servers are completely consistent, the main server serves the external service and synchronizes the service data to the standby server in real time, and once the main server fails (such as shutdown of an operating system, accidental power failure of the server, network failure and the like), the servHA dual-server hot-standby software automatically switches the service application to the standby server to continue the external service, so that the uninterrupted operation of the service application is protected.
In the existing dual-computer hot-standby scheme, the dual-computer hot-standby in general sense has a switching process, which may be about one minute. During the handover, there is a possibility of short interruptions of service. However, when the handover is completed, the service will be restored normally. Therefore, the dual-computer hot standby is not seamless and uninterrupted, but can ensure that the normal service can be recovered quickly when a system fault occurs, the service cannot be influenced, but the tolerance of a user is greatly reduced when the fault occurs in the live broadcasting process of the system, and particularly in the live broadcasting process of some important conferences, once the main server fails, the system is required to be recovered to the normal state in the shortest time.
Disclosure of Invention
The invention provides a heartbeat-based dual-computer hot standby method which is high in speed and does not need manual intervention in order to overcome the defects in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a hot standby method of double computers based on heartbeat comprises two director computers and a live broadcast server, wherein the director computers are connected with the live broadcast server, the most core of each director computer comprises two parts, a heartbeat monitoring part and a resource taking part, and the hot standby method specifically comprises the following steps:
(1) the heartbeat monitoring part is carried out through a wireless network card link, and the main director sends a message at regular time to tell the current state of the standby director;
(2) if the heartbeat message sent by the main director is not received within the appointed time, the opposite side is considered to have a fault, and at the moment, a resource takeover part on the standby director is started to take over the live broadcast service running on the main director to be pushed to the live broadcast server.
The live broadcast server has the function of hot standby of the director, ensures that when a fault occurs in the live broadcast process of the host, the standby machine is automatically switched to the host, simultaneously starts the live broadcast service and pushes the live broadcast service to the live broadcast server, can quickly recover the normal live broadcast service, has short active-standby switching time and high speed, automatically switches without manual intervention, ensures the uninterrupted real-time operation of the live broadcast service, and increases the guarantee for the safety and the real-time performance of the live broadcast.
Preferably, in step (1), when performing heartbeat detection through IP, the active and standby dual directors may periodically send out a detection test packet through a heartbeat path, and when the system is normal, the main director provides live broadcast service for the system, the standby director monitors the operation condition of the working machine, and the main director also detects whether the standby director is normal.
Preferably, in step (1), the specific operation method is as follows: after the main director and the standby director are synchronously finished, the main director starts a process of sending heartbeat messages, the size and the content of the messages are fixedly defined by the main director and the standby director in advance, the sending interval of the heartbeat messages is 2s, when the standby director receives the heartbeat messages sent by the main director, whether the size and the content of the heartbeat messages are consistent with the previous definition is checked, if the standby director obtains the current system clock T1, the current system clock is obtained again and the T1 is updated each time the heartbeat messages sent by the main director are received.
Preferably, in step (1), when the main director and the standby director are normally connected, the main director starts live broadcast and operates, and then informs the standby director of a live broadcast state through a Tcp message, when the live broadcast state, a live broadcast address and an information source of the main director change, different types of messages are sent through the Tcp to inform the standby director, the standby director performs corresponding synchronous processing according to message types, and when the live broadcast state, the live broadcast address and live broadcast output coding parameters of the main director change, the standby director is informed in real time.
Preferably, in step (2), the failure determination method is as follows: after the main director and the standby director are synchronously finished, the standby director starts a heartbeat message detection process, the detection process acquires a system clock T2 once every 1s, whether the difference value between T2 and T1 is larger than 4s is calculated, if the difference value is smaller than 4s, the standby director waits for the next detection, and if the difference value is larger than 4s, the standby director does not receive heartbeat messages sent by the main director for 2 times continuously, so that the main director is judged to have system faults, director faults or network faults.
Preferably, in step (2), when the main director system fails and the director fails and exits abnormally, the Tcp bottom layer exception handling mechanism is triggered to send a SOCKET _ ERROR message, and the standby director receives the SOCKET _ ERROR message immediately through the Tcp bottom layer exception handling mechanism for judgment; under the condition of network failure, the standby director judges through a heartbeat timeout detection mechanism, namely: when the Tcp connection is established between the main director and the standby director, the transmission overtime time is set to be 2s by setting a data transmission overtime time parameter, and the transmission overtime is determined.
Preferably, in the step (2), when the standby director judges that the main director has a fault, the standby director checks a live broadcast state when the main director has the fault, if the standby director is in a live broadcast starting state, the standby director starts a live broadcast service module, the live broadcast service module pushes a live broadcast data stream to a live broadcast server according to a live broadcast address set by the main director, the main director is actively taken over to work, the live broadcast service on the main director is continuously supported, and the uninterrupted operation of the system is ensured; and if the live broadcast state is not started, the standby machine live broadcast module is not started.
Preferably, in the step (2), if the standby director fails, the main director displays the standby director failure alarm prompt detection; and if other standby directors exist, switching the other standby directors.
Preferably, in the step (2), the standby director detects whether the main director is normal or not during the operation, and if the standby director receives a normal number of heartbeat detection packets, the standby director actively takes over the operation of the standby director to continuously support the live broadcast service on the standby director, thereby ensuring the uninterrupted operation of the system.
The invention has the beneficial effects that: the method can quickly recover normal live broadcast service, has short time for switching the main live broadcast service and the standby live broadcast service, is high in speed, does not need manual intervention for automatic switching, ensures uninterrupted real-time operation of the live broadcast service, and increases guarantee for the safety and the real-time performance of the live broadcast.
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FIG. 1 is a flow chart of a method of the present invention;
fig. 2, 3 and 4 are schematic diagrams of three kinds of faults of the main director of the present invention.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
In the embodiment shown in fig. 1, a heartbeat-based dual-server hot standby method includes two directors and a live broadcast server, where the directors are connected to the live broadcast server, and the most core of each director includes two parts, a heartbeat monitoring part and a resource takeover part, and specifically includes the following steps:
(1) the heartbeat monitoring part is carried out through a wireless network card link, and the main director sends a message at regular time to tell the current state of the standby director; the method specifically comprises the following steps: when heartbeat detection is performed through IP, the main and standby dual-director periodically sends out a detection test packet through a heartbeat path (TCP/IP protocol), under the condition that the system is normal, the main director provides live broadcast service for the system, the standby director monitors the operation condition of a working machine, and the main director simultaneously detects whether the standby director is normal or not;
the specific operation method comprises the following steps: after the main director and the standby director are synchronously finished, the main director starts a process of sending heartbeat messages, the size and the content of the messages are fixedly defined by the main director and the standby director in advance, the sending interval of the heartbeat messages is 2s, when the standby director receives the heartbeat messages sent by the main director, whether the size and the content of the heartbeat messages are consistent with the previous definition is checked, if the standby director obtains the current system clock T1, the current system clock is obtained again and the T1 is updated each time the heartbeat messages sent by the main director are received; when the main director is normally connected with the standby director, the main director starts live broadcast and operates, and then informs the standby director of the live broadcast state through Tcp information, when the live broadcast state, the live broadcast address and the information source of the main director change, different types of information are sent through Tcp to inform the standby director, the standby director performs corresponding synchronous processing according to the information type, and the main director informs the standby director of the live broadcast state, the live broadcast address and the live broadcast output coding parameter in real time when the main director changes;
(2) if the heartbeat message sent by the main director is not received within the specified time, the other side is considered to have a fault, and at the moment, a resource takeover part on the standby director is started to take over the live broadcast service running on the main director to be pushed to the live broadcast server; the fault judgment method comprises the following steps: after the main director and the standby director are synchronously finished, the standby director starts a heartbeat message detection process, the detection process acquires a system clock T2 every 1s, whether the difference value between T2 and T1 is greater than 4s or not is calculated, if the difference value is less than 4s, the standby director waits for the next detection, and if the difference value is greater than 4s, the standby director does not receive the heartbeat message sent by the main director for 2 times continuously, so that the system fault, the director fault or the network fault of the main director is judged;
under the condition that the system of the main director (as shown in figure 2) and the director (as shown in figure 3) are abnormally exited, triggering a Tcp bottom layer abnormal processing mechanism to send a SOCKET _ ERROR message, and immediately receiving the SOCKET _ ERROR message by the standby director through the Tcp bottom layer abnormal processing mechanism for judgment; under the condition of network failure, the standby director judges through a heartbeat timeout detection mechanism, namely: when a Tcp connection is established between a main director and a standby director, setting a data transmission overtime time parameter, setting the transmission overtime time to be 2s, and judging the transmission overtime; when the standby director judges that the main director has a fault, the standby director checks the live broadcast state when the main director has the fault, if the standby director is in the live broadcast starting state, the standby director starts a live broadcast service module, the live broadcast service module pushes live broadcast data streams to a live broadcast server according to a live broadcast address set by the main director, the work of the main director is actively taken over, the live broadcast service on the main director is continuously supported, and the uninterrupted operation of the system is ensured; and if the live broadcast state is not started, the standby machine live broadcast module is not started. If the standby director fails, the main director displays the failure alarm prompt detection of the standby director; if other standby director machines exist, switching the other standby director machines; and the standby director detects whether the main director is normal or not in the operation process, if the number of heartbeat detection packets received by the standby director is normal, the standby director takes over the work of the standby director actively, and continuously supports the live broadcast service on the standby director, thereby ensuring the uninterrupted operation of the system.
The live broadcast server has the function of hot standby of the director, ensures that when a fault occurs in the live broadcast process of the host, the standby machine is automatically switched to the host, simultaneously starts the live broadcast service and pushes the live broadcast service to the live broadcast server, can quickly recover the normal live broadcast service, has short active-standby switching time and high speed, automatically switches without manual intervention, ensures the uninterrupted real-time operation of the live broadcast service, and increases the guarantee for the safety and the real-time performance of the live broadcast.
Claims (9)
1. A hot standby method of double computers based on heartbeat is characterized by comprising two director computers and a live broadcast server, wherein the director computers are connected with the live broadcast server, the most core of each director computer comprises two parts, a heartbeat monitoring part and a resource taking-over part, and the hot standby method specifically comprises the following steps:
(1) the heartbeat monitoring part is carried out through a wireless network card link, and the main director sends a message at regular time to tell the current state of the standby director;
(2) if the heartbeat message sent by the main director is not received within the appointed time, the opposite side is considered to have a fault, and at the moment, a resource takeover part on the standby director is started to take over the live broadcast service running on the main director to be pushed to the live broadcast server.
2. The hot standby method according to claim 1, wherein in step (1), when detecting the heartbeat via IP, the main director and the standby director periodically send out a test packet to be detected via a heartbeat path, and when the system is normal, the main director provides a live broadcast service to the system, and the standby director monitors the operation of the working machine, and the main director also detects whether the standby director is normal.
3. A dual-computer hot-standby method based on heartbeat as claimed in claim 2, wherein in step (1), the specific operation method is as follows: after the main director and the standby director are synchronously finished, the main director starts a process of sending heartbeat messages, the size and the content of the messages are fixedly defined by the main director and the standby director in advance, the sending interval of the heartbeat messages is 2s, when the standby director receives the heartbeat messages sent by the main director, whether the size and the content of the heartbeat messages are consistent with the previous definition is checked, if the standby director obtains the current system clock T1, the current system clock is obtained again and the T1 is updated each time the heartbeat messages sent by the main director are received.
4. The hot standby method for dual computers based on heartbeat according to claim 3, characterized in that in step (1), when the main director and the standby director are normally connected, the main director starts live broadcast and operates and then informs the standby director of the live broadcast state through Tcp messages, when the live broadcast state, the live broadcast address and the information source of the main director change, different types of messages are sent through Tcp to inform the standby director, the standby director performs corresponding synchronous processing according to the message types, and when the host live broadcast state, the live broadcast address and the live broadcast output coding parameters change, the standby director is informed in real time.
5. The dual hot-standby method based on heartbeat as claimed in claim 4, wherein in the step (2), the failure determination method is as follows: after the main director and the standby director are synchronously finished, the standby director starts a heartbeat message detection process, the detection process acquires a system clock T2 once every 1s, whether the difference value between T2 and T1 is larger than 4s is calculated, if the difference value is smaller than 4s, the standby director waits for the next detection, and if the difference value is larger than 4s, the standby director does not receive heartbeat messages sent by the main director for 2 times continuously, so that the main director is judged to have system faults, director faults or network faults.
6. The dual-computer hot-standby method based on heartbeat according to claim 5, characterized in that in step (2), under the condition that the main broadcaster system fails and the director fails and exits abnormally, the Tcp bottom layer abnormal handling mechanism is triggered to send a SOCKET _ ERROR message, and the standby director receives the SOCKET _ ERROR message immediately through the Tcp bottom layer abnormal handling mechanism for judgment; under the condition of network failure, the standby director judges through a heartbeat timeout detection mechanism, namely: when the Tcp connection is established between the main director and the standby director, the transmission overtime time is set to be 2s by setting a data transmission overtime time parameter, and the transmission overtime is determined.
7. The hot standby method for two computers based on heartbeat according to claim 5 or 6, characterized in that in step (2), when the standby director judges that the main director is out of order, the standby director checks the live broadcast state when the main director is out of order, if the standby director is in the live broadcast on state, the standby director starts the live broadcast service module, the live broadcast service module pushes the live broadcast data stream to the live broadcast server according to the live broadcast address set by the main director, actively takes over the work of the main director, and continuously supports the live broadcast service on the main director, thereby ensuring the uninterrupted operation of the system; and if the live broadcast state is not started, the standby machine live broadcast module is not started.
8. The hot-standby method according to claim 7, wherein in step (2), if the standby director fails, the main director displays a failure alarm prompt detection of the standby director; and if other standby directors exist, switching the other standby directors.
9. The hot standby method according to claim 7, wherein in step (2), the standby director detects whether the main director is normal or not during operation, and if the number of heartbeat detection packets received by the standby director is normal, the standby director takes over the operation of the standby director actively to continue to support the live broadcast service on the standby director, thereby ensuring uninterrupted operation of the system.
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| CN113612499A (en) * | 2021-08-20 | 2021-11-05 | 河南辉煌科技股份有限公司 | Method for realizing answering type two-way data acquisition |
| CN114979688A (en) * | 2022-05-11 | 2022-08-30 | 北京大甜绵白糖科技有限公司 | Live broadcast data transmission system, method and device |
| CN115314733A (en) * | 2022-08-05 | 2022-11-08 | 京东方智慧物联科技有限公司 | Data display system, method, electronic device and storage medium |
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