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    云点播视频上传加速方案,提高上传质量,速度提升60%!

    随着互联网的发展,来自用户的音视频媒体上传体量日益增加,媒体上传的速度正在成为影响用户体验的关键因素。由于用户所在地的网络基础设施、网络环境等因素的差异,上传可能会出现速度缓慢、网络抖动或丢包等问题。用户媒体上传依然有很多痛点问题需要解决。 长距离传输质量不稳定 国内主流云服务提供商在北京、上海、广州等城市部署了存储中心,腾讯云也是如此。在业务实践中,不可避免会出现终端用户与存储中心距离间隔太远的场景,例如,对于新疆乌鲁木齐的用户而言,最近的存储中心在约3000公里外的成都。对于印尼这类群岛国家,边缘岛屿的

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    FogROS2 使用 ROS 2 的云和雾机器人的自适应和可扩展平台

    FogROS 2: An Adaptive and Extensible Platform for Cloud and Fog Robotics Using ROS 2 Abstract— Mobility, power, and price points often dictate that robots do not have sufficient computing power on board to run modern robot algorithms at desired rates. Cloud computing providers such as AWS, GCP, and Azure offer immense computing power on demand, but tapping into that power from a robot is non-trivial. In this paper, we present FogROS2, an easy-to-use, open-source platform to facilitate cloud and fog robotics that is compatible with the emerging Robot Operating System 2 (ROS 2) standard. FogROS 2 provisions a cloud computer, deploys and launches ROS 2 nodes to the cloud computer, sets up secure networking between the robot and cloud, and starts the application running. FogROS 2 is completely redesigned and distinct from its predecessor to support ROS 2 applications, transparent video compression and communication, improved performance and security, support for multiple cloud-computing providers, and remote monitoring and visualization. We demonstrate in example applications that the performance gained by using cloud computers can overcome the network latency to significantly speed up robot performance. In examples, FogROS 2 reduces SLAM latency by 50%, reduces grasp planning time from 14s to 1.2s, and speeds up motion planning 28x. When compared to alternatives, FogROS 2 reduces network utilization by up to 3.8x. FogROS2, source, examples, and documentation is available at github.com/BerkeleyAutomation/FogROS2.

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    网站速度优化之“动静分离”、有效减轻后端服务器压力!

    在介绍动静分离之前,我感觉还是有必要介绍一下:什么是静态网站?什么是动态网站?由于我之前已经在一篇个人博客中详细介绍了动静态网站,在这里就不再做详细的描述(有需要的小伙伴可以前往了解:《什么是动静态网站?》)。知道什么是动态网站之后,我们拿最常见的PHP动态网站来说,一次完整的网站加载请求中,浏览器客户端会向服务器请求一系列所需静态文件:.html;.css;.js;.jpg;.png还有一些字体文件等,当然还包括动态请求:***.php等。而所谓的“动静分离”是将网站静态资源(HTML,CSS,JS,JPG,PNG等文件)与后台应用分开部署,提高用户访问静态文件的速度,降低对后台应用访问,这样您的小服务器就可以把全部精力投入到动态请求的查询和解析中去,从而有效的减轻后端服务器的压力。

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