Method for ensuring high-reliability service of metadata server group of distributed file system
A metadata server and distributed file technology, applied in the transmission system, digital transmission system, data exchange network, etc., can solve the problems of no message, sending and receiving, and irregular time distribution of application layer messages, so as to avoid system errors Effect
Inactive Publication Date: 2012-04-04
WUXI CITY CLOUD COMPUTING CENT
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Problems solved by technology
It is necessary to check whether all the links in the group are working normally. Under normal conditions, the time distribution of application layer messages is irregular, and there may be no messages sent or received for a considerable period of time, which may cause link malfunctions And the network module does not yet know
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[0022] figure 1 A high-reliability schematic diagram of the distributed file system metadata group of the present invention is given, which consists of four parts: HA process, HA thread, heartbeat thread and underlying communication. Among them, HA thread, heartbeat thread and communication are all part of the network module. The running state of the system is shown in the figure. After the system is started, the HA process starts the monitored process, and the monitored process starts the network module. The network module in the monitored process will get the network status and service status, and report its own running status and network status to the HA process at the heartbeat rate, and the HA process will notify the peer HA process of this status.
[0023] The parent process flow reference of the present invention figure 2 ,detailed steps:
[0024] Step 1: The HA process starts, initializes, reads the configuration, and obtains the configuration properties of the HA....
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The invention provides a method for ensuring high-reliability service of a metadata server group of a distributed file system. The method comprises the following steps of: starting a high-reliability service process, initiating the high-reliability service process, and reading a configuration attribute table of the high-reliability service process; starting a service process by the high-reliability service process, and periodically checking the state of the service process; starting a network module by the service process to acquire a network state and a service state, reporting a running state of a heartbeat thread and a network state to the high-reliability service process by the heartbeat thread at a set rate; performing communication between the high-reliability service process and the high-reliability service processes of other server groups to inform the state; stopping sending information by the heartbeat thread if the state of the service process is abnormal; and re-starting the service process by the high-reliability service process after the high-reliability service processes of other server groups cannot receive the information of the heartbeat thread. According to the method, system error can be avoided by different servers, and continuous correct service is provided.
Description
technical field [0001] The invention relates to the field of high reliability of distributed file systems, in particular to a method for ensuring high reliability of services of metadata server groups of distributed file systems. Background technique [0002] The file system manages data, and usually stores metadata as the most important data on highly reliable devices. The distributed file system, due to the management of massive data, usually has a large amount of metadata, which requires special storage devices to store. At this point, the performance and security of the metadata storage device becomes the bottleneck of the entire distributed file system. Metadata servers for distributed file systems usually require very high reliability. Then the redundant backup technology becomes the preferred technology for the highly reliable solution of the metadata server group. The system is required to avoid system errors and provide uninterrupted and correct services. In ord...
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Inventor 王勇张东阳张玉龙姜国梁彭程吕民强
Owner WUXI CITY CLOUD COMPUTING CENT