Research And Application Of Remote Sensing Data Sharing Distributed Architecture

With the high-resolution satellites put into use, the application requirement of the user to the satellite data is more and more urgent. The number of users is increasing. Remote sensing data distribution center need to improve the ability to cope with the increasing distribution of external data distribution request. Because of the limited network bandwidth of the remote sensing data distribution center, in this paper, we discuss the improvement scheme of "Remote Sensing Information Network System", and propose several schemes to alleviate the pressure of the distribution center.Option One: to ease the pressure on network resources by building a distribution center distribution center mirror. So that the mirror image distribution centers constitute a cluster by cluster together on the distribution task. Option Two: By all distribution nodes transformed into a peer node point to ease pressure on the network of distribution centers. Cache data on the distribution nodes will be shared in the system. In this paper, we design a mirror cluster and cache cluster based on two kinds of improved schemes. And according to the data storage from near to far submit the request, according to the network speed from fast to slow transmission mode.The main work of this paper is as follows:1. To improve the system architecture and analyze the bottleneck of data transmission in the existing system architecture. In view of the low efficiency of the existing architecture and the low efficiency of the remote sensing image, the distribution center and the plate center are used as the data source, which can reduce the transmission pressure of the single data source.2. Build mirror clusters, research the mirror distribution center, and mirror clusters. And building data public task queue. Using the central task database to manage the cluster task, so that the cluster can work together to handle data push task, and reduce the pressure of the single data distribution center.3. The rule of resource mirror image is constructed, and the rule of mirror image is used to customize the image data. To make the distribution of the mirror image more suitable for the application of the area. And the mirror image is distributed to the corresponding mirror distribution center by the way of the mirror public push queue.4. Cache cluster is constructed, and cache cluster is constructed by using the plate FTP cache data. Cache cluster transfer tasks dynamically adjust the data source based on end to end transmission rate, and speed up the processing speed of the current transmission task.