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Massive vehicle-mounted machine track data storage method

A trajectory data and vehicle-machine technology, which is applied in the storage field of massive vehicle-machine trajectory data, can solve problems such as low efficiency, achieve the effect of reducing IO operations and improving retrieval efficiency

Inactive Publication Date: 2015-04-15
北京中交兴路车联网科技有限公司
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Problems solved by technology

However, this storage method is extremely inefficient. In the case of concurrent query and insert operations, there will be mutual lock waiting, especially when extracting the trajectory of a single vehicle for a certain number of days, it is necessary to scan a large number of database block files. The corresponding information is extracted. Therefore, this storage method can only cope with the scenario of less than 10,000 vehicles. It will be at a loss for the current rapid growth in the demand for vehicle access.

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Embodiment Construction

[0009] like figure 1 As shown, the storage method of this mass vehicle trajectory data uses the file system as the storage medium, and divides the file system into three levels of directory structures according to the three levels of year, month and day. Each vehicle generates daily A trajectory file is stored in the corresponding directory; as time grows, the above storage method will generate a large number of trajectory files, occupying the Inodes of the file system (index nodes, file data are stored in "blocks", then obviously , it is also necessary to find a place to store the meta information of the file, such as the creator of the file, the date of creation of the file, the size of the file, etc. The area where the meta information of the file is stored is called the number of inodes, and the number of Inodes continues to increase. It will reduce the IO storage efficiency. In order to solve this problem, the track files of the previous day are merged and compressed at 0...

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Abstract

The invention discloses a massive vehicle-mounted machine track data storage method which can meet the storage requirement of TB-grade track data generated every day under the condition of access of massive vehicle-mounted machine, and can search track data of a certain vehicle in a short time. The storage method takes a file system as a storage medium, the file system is divided into directory structures with three layers according to years, months and days, each vehicle-mounted machine generates a track file every day, the track file is stored in corresponding directories, and the track files in a previous day are combined and compressed at 0 o'clock every day.

Description

technical field [0001] The invention relates to the technical field of vehicle data processing, in particular to a method for storing massive vehicle-machine trajectory data. Background technique [0002] At present, most of the mainstream vehicle trajectory data storage methods use the database as the medium, and the trajectories of multiple vehicles are stored in a database table. However, this storage method is extremely inefficient. In the case of concurrent query and insert operations, there will be mutual lock waiting, especially when extracting the trajectory of a single vehicle for a certain number of days, it is necessary to scan a large number of database block files. The corresponding information is extracted. Therefore, this storage method can only cope with the scenario of less than 10,000 vehicles, and will be at a loss for the current rapid growth in the demand for vehicle access. Contents of the invention [0003] The technical solution of the present inve...

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Application Information

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IPC IPC(8): G06F17/30
CPCG06F16/22
Inventor 韩希发杨健邓伟
Owner 北京中交兴路车联网科技有限公司
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