Presentation to show how the video is transferred using ffmpeg, ffserver that can be played in mobile and desktop browsers.
HTTP : Protocol to transfer data in web
Streaming : Method of transferring continuous data
Walks through the basics of the HTTP protocol, URLs, cookies and caching, with tricks and tips that can be used by web developers. From a Geek.class I did on Oct 6, 2011 for Meet the Geeks.
This document discusses streaming video in iOS. It provides an overview of streaming technologies like HLS, MPEG-DASH and protocols used for streaming. It then discusses problems with streaming on iOS and restrictions from Apple. The bulk of the document is focused on explaining how HLS works, including its architecture with server components, distribution components and client components. It demonstrates setting up HLS on a server and consuming HLS streams in iOS. It also discusses using the Wowza streaming server to deliver multi-device streaming.
Rawnet Lightning talk 'How the Internet Works'Rawnet
The document discusses how the internet works by explaining that it is a decentralized global network of computers created by DARPA in the 1960s. It then describes how loading a website involves opening a socket to the server and sending an HTTP request, which is routed using DNS to map domain names to IP addresses and routing protocols to direct traffic between networks. Content delivery networks are also mentioned as optimizing website load times.
Web Server Technologies I: HTTP & Getting StartedPort80 Software
Introduction to HTTP: TCP/IP and application layer protocols, URLs, resources and MIME Types, HTTP request/response cycle and proxies. Setup and deployment: Planning Web server & site deployments, Site structure and basic server configuration, Managing users and hosts.
mod_ftp is a module for Apache HTTP Server that implements the File Transfer Protocol (FTP) within the Apache architecture. It leverages Apache's flexibility to serve FTP alongside HTTP and HTTPS from the same server instance. mod_ftp supports key FTP features like SSL/TLS encryption, authentication, dynamic content, and logging while integrating with the Apache ecosystem. The document provides an overview of mod_ftp's capabilities and includes a sample configuration.
Walks through the basics of the HTTP protocol, URLs, cookies and caching, with tricks and tips that can be used by web developers. From a Geek.class I did on Oct 6, 2011 for Meet the Geeks.
This document discusses streaming video in iOS. It provides an overview of streaming technologies like HLS, MPEG-DASH and protocols used for streaming. It then discusses problems with streaming on iOS and restrictions from Apple. The bulk of the document is focused on explaining how HLS works, including its architecture with server components, distribution components and client components. It demonstrates setting up HLS on a server and consuming HLS streams in iOS. It also discusses using the Wowza streaming server to deliver multi-device streaming.
Rawnet Lightning talk 'How the Internet Works'Rawnet
The document discusses how the internet works by explaining that it is a decentralized global network of computers created by DARPA in the 1960s. It then describes how loading a website involves opening a socket to the server and sending an HTTP request, which is routed using DNS to map domain names to IP addresses and routing protocols to direct traffic between networks. Content delivery networks are also mentioned as optimizing website load times.
Web Server Technologies I: HTTP & Getting StartedPort80 Software
Introduction to HTTP: TCP/IP and application layer protocols, URLs, resources and MIME Types, HTTP request/response cycle and proxies. Setup and deployment: Planning Web server & site deployments, Site structure and basic server configuration, Managing users and hosts.
mod_ftp is a module for Apache HTTP Server that implements the File Transfer Protocol (FTP) within the Apache architecture. It leverages Apache's flexibility to serve FTP alongside HTTP and HTTPS from the same server instance. mod_ftp supports key FTP features like SSL/TLS encryption, authentication, dynamic content, and logging while integrating with the Apache ecosystem. The document provides an overview of mod_ftp's capabilities and includes a sample configuration.
This document provides an overview of Flash Media Server, including what it is, its versions and types, how to configure applications and streams, and how to install and set up the server. It discusses topics like RTMP, shared objects, NetStream connections, and database integration. Code examples are provided for connecting to the server and playing streams.
The document defines and describes various network performance metrics that are logged, including time, address, incoming and outgoing traffic sizes, packet loss, ping times, and delays. It notes that spikes in certain metrics like loss, sent, ping, or variance can indicate network lag issues, and defines terms like reliable delayed, unreliable delayed, and time spent in critical section that relate to packet throughput and processing times.
This document provides an overview of the Simple Mail Transfer Protocol (SMTP). It begins with an introduction that defines SMTP and its use for electronic mail transmission. It then covers the working of SMTP, including the client-server model, commands, responses, and mail transfer phases of connection setup, mail transfer, and connection termination. It also provides a comparison of SMTP to HTTP, noting differences in how each protocol transfers files and initiates TCP connections. In summary, the document outlines the key components and functionality of the SMTP protocol for electronic mail transmission across the internet.
FTP is a standard protocol for transferring files over the Internet. It establishes two connections between hosts - one for data transfer and the other for control information like commands. FTP uses ports 21 for control and 20 for data. It supports different transmission modes like stream, block, and compressed. It allows clients to authenticate, specify file formats, and access files anonymously in some cases.
The document discusses HTTP requests and responses. It explains that HTTP is the most popular application protocol used on the internet. An HTTP client sends a request to a server, which returns a response. Requests use URLs to identify resources and consist of a request line and optional headers. Responses also include a status line and headers to provide information to the client. HTML forms allow sending request data to servers using GET or POST requests.
HTTP is the most popular application protocol on the internet. It uses the client-server model where an HTTP client sends a request to an HTTP server using a request method like GET or POST. The server then returns a response with a status code and can include a message body. A URL identifies a web resource and includes the protocol, hostname, port, and path. HTTP specifications are maintained by the W3C and the current versions are HTTP/1.0 and HTTP/1.1. The HTTP request and response include a start line, headers, and optional body. Common status codes indicate success, redirection, or client/server errors.
This document provides an overview of Apple's HTTP Live Streaming (HLS) protocol for dynamically adapting video streaming to network conditions. It describes the basics of HLS including how content is prepared and served, how clients play the stream by obtaining playlist files that list available media segments, and new tags defined by the HLS protocol such as EXT-X-TARGETDURATION and EXT-X-MEDIA-SEQUENCE. It also compares HLS to other adaptive streaming protocols and shows examples of analyzing an HLS stream with Wireshark.
Scraper site are those site which copies content from other
websites.
Web Scraping is the method of collecting certain kind of
data from the websites.
Also known as : screen scraping, site scraping, web
harvesting and web data extraction
Mobile Movies with HTTP Live Streaming (CocoaConf DC, March 2013)Chris Adamson
The document summarizes Chris Adamson's presentation on mobile movies with HTTP Live Streaming. The presentation covered what streaming is and how it differs from traditional broadcast media, introduced HTTP Live Streaming (HLS) as a way to stream media over HTTP, and described how HLS works by serving media in short file segments using a playlist file. It also discussed features of HLS like providing multiple variants for different bandwidths and encrypting file segments for security.
The document discusses HTTP Live Streaming (HLS) and how to implement HLS streaming with Go. HLS allows audio and video to be streamed over HTTP for playback on Apple devices. It works by encoding media into small HTTP-based file segments that can be delivered to clients efficiently and played back seamlessly. The document then outlines the key components of HLS, how it works, compatibility and competitors. It also provides information about the Go programming language and popular uses before describing the basic steps to implement an HLS server with Go, including defining routes, handlers and serving the required file types.
AWS Webcast - Using JW Player and Amazon CloudFront to Stream HLS VideoAmazon Web Services
Learn how you can use Amazon CloudFront and JW Player to stream video in the HTTP Live Streaming Format to multiple devices. We will cover the encoding, storage and delivery of the video using AWS and will demonstrate how JW Player can be configured to play the content on your desktop and mobile devices.
Flink, Spark, and Storm are three popular streaming platforms compared on performance. A benchmark was created to simulate an advertising analytics pipeline with events streamed to Kafka. Flink and Storm had similar linear latency increases with throughput. Spark had higher latency due to micro-batching, but could handle higher throughput. At very high throughput, Storm performed best with acknowledgments disabled, while Flink provided low latency with processing guarantees. Overall, the platforms demonstrated tradeoffs between latency, throughput and exactly-once processing.
The document provides an introduction to web server technologies and HTTP. It discusses the role of web servers, an overview of HTTP including versions and the TCP/IP protocol stack. It also covers the basic HTTP request/response cycle, different types of proxy servers, and planning considerations for web server deployment including hosting options, server software selection, and sizing requirements.
The document summarizes different techniques for streaming media, including HTTP Live Streaming (HLS) and Real Time Streaming Protocol (RTSP). It then describes the architecture and process of HLS in detail over 4 steps:
1) The media is encoded and segmented by the encoder.
2) The segmenter splits the encoded media into short chunks and encrypts the segments if needed.
3) The distribution system stores the segments and playlists on an HTTP server.
4) The client downloads playlists and segments through HTTP and plays the media.
The document also compares RTSP and HLS, noting advantages of HLS like reliability, firewall traversal, and use on YouTube. It surveys different video-
Web services allow programs to call methods on other computers over a network. They are frequently web APIs that can be accessed remotely and executed on another system. Web services consist of method information describing the method being called and scoping information describing required arguments. This information is packaged and sent across the network using various protocols like HTTP, SOAP, and XML-RPC. The internet protocol stack, consisting of layers like application, transport, network and link, is used to break information into packets that can travel over the network to their destination and be reassembled.
Web services allow programs to communicate over a network by calling methods on remote systems. They are frequently web APIs that can be accessed over a network like the internet. A web service call packages method and scoping information into an envelope that is transported across the network using defined protocols like HTTP and TCP. At the destination, the same protocols unpack the envelope and call the requested method. Web servers store web pages and dynamic content, and respond to client requests over the internet using HTTP to deliver HTML files and other objects.
The document discusses internet video streaming versus IPTV and the challenges of streaming multimedia over the internet. It covers topics like the difference between internet video and IPTV, characteristics of multimedia streaming, challenges of UDP for streaming, and suggestions to improve streaming stability and quality of service. It suggests standardizing congestion control algorithms and using techniques like forward error correction to improve reliability of multimedia streams over UDP.
FTP (File Transfer Protocol) is a standard network protocol used to transfer files between computers over a TCP/IP network like the Internet. It uses separate connections for control commands and data transfer. FTP servers allow users to upload, download, and organize files. Setting up an FTP server involves installing FTP server software on a computer with a static IP address or domain name. This allows other users to access files by logging in anonymously or with a provided username and password. FTP clients are programs that users can install to connect to FTP servers and transfer files in either direction with drag-and-drop or other simple interfaces.
This document provides an introduction to dynamic web content and web application technologies. It discusses how web servers, browsers, HTML, CSS, JavaScript, and other technologies work together to deliver dynamic web pages and applications to users. Key points covered include how browsers make HTTP requests to servers, how servers respond with HTML documents, and how languages like JavaScript can be used to add interactivity to web pages. Network concepts like TCP connections, ports, and IP addresses are also briefly summarized.
Proxy servers act as an intermediary for requests from clients seeking resources from other servers. There are different types of proxy servers including cache proxies that speed up access and web proxies that allow users to connect to servers and access the internet. Proxy servers aim to provide privacy by hiding clients' IP addresses and allow access around content blocks. FTP and HTTP are protocols for transferring files and web pages respectively using the client-server model, with FTP using separate control and data connections and HTTP using request and response messages. Proxy servers can also be used with FTP and HTTP to add capabilities like caching, authentication, and traffic monitoring.
This document provides an overview of Flash Media Server, including what it is, its versions and types, how to configure applications and streams, and how to install and set up the server. It discusses topics like RTMP, shared objects, NetStream connections, and database integration. Code examples are provided for connecting to the server and playing streams.
The document defines and describes various network performance metrics that are logged, including time, address, incoming and outgoing traffic sizes, packet loss, ping times, and delays. It notes that spikes in certain metrics like loss, sent, ping, or variance can indicate network lag issues, and defines terms like reliable delayed, unreliable delayed, and time spent in critical section that relate to packet throughput and processing times.
This document provides an overview of the Simple Mail Transfer Protocol (SMTP). It begins with an introduction that defines SMTP and its use for electronic mail transmission. It then covers the working of SMTP, including the client-server model, commands, responses, and mail transfer phases of connection setup, mail transfer, and connection termination. It also provides a comparison of SMTP to HTTP, noting differences in how each protocol transfers files and initiates TCP connections. In summary, the document outlines the key components and functionality of the SMTP protocol for electronic mail transmission across the internet.
FTP is a standard protocol for transferring files over the Internet. It establishes two connections between hosts - one for data transfer and the other for control information like commands. FTP uses ports 21 for control and 20 for data. It supports different transmission modes like stream, block, and compressed. It allows clients to authenticate, specify file formats, and access files anonymously in some cases.
The document discusses HTTP requests and responses. It explains that HTTP is the most popular application protocol used on the internet. An HTTP client sends a request to a server, which returns a response. Requests use URLs to identify resources and consist of a request line and optional headers. Responses also include a status line and headers to provide information to the client. HTML forms allow sending request data to servers using GET or POST requests.
HTTP is the most popular application protocol on the internet. It uses the client-server model where an HTTP client sends a request to an HTTP server using a request method like GET or POST. The server then returns a response with a status code and can include a message body. A URL identifies a web resource and includes the protocol, hostname, port, and path. HTTP specifications are maintained by the W3C and the current versions are HTTP/1.0 and HTTP/1.1. The HTTP request and response include a start line, headers, and optional body. Common status codes indicate success, redirection, or client/server errors.
This document provides an overview of Apple's HTTP Live Streaming (HLS) protocol for dynamically adapting video streaming to network conditions. It describes the basics of HLS including how content is prepared and served, how clients play the stream by obtaining playlist files that list available media segments, and new tags defined by the HLS protocol such as EXT-X-TARGETDURATION and EXT-X-MEDIA-SEQUENCE. It also compares HLS to other adaptive streaming protocols and shows examples of analyzing an HLS stream with Wireshark.
Scraper site are those site which copies content from other
websites.
Web Scraping is the method of collecting certain kind of
data from the websites.
Also known as : screen scraping, site scraping, web
harvesting and web data extraction
Mobile Movies with HTTP Live Streaming (CocoaConf DC, March 2013)Chris Adamson
The document summarizes Chris Adamson's presentation on mobile movies with HTTP Live Streaming. The presentation covered what streaming is and how it differs from traditional broadcast media, introduced HTTP Live Streaming (HLS) as a way to stream media over HTTP, and described how HLS works by serving media in short file segments using a playlist file. It also discussed features of HLS like providing multiple variants for different bandwidths and encrypting file segments for security.
The document discusses HTTP Live Streaming (HLS) and how to implement HLS streaming with Go. HLS allows audio and video to be streamed over HTTP for playback on Apple devices. It works by encoding media into small HTTP-based file segments that can be delivered to clients efficiently and played back seamlessly. The document then outlines the key components of HLS, how it works, compatibility and competitors. It also provides information about the Go programming language and popular uses before describing the basic steps to implement an HLS server with Go, including defining routes, handlers and serving the required file types.
AWS Webcast - Using JW Player and Amazon CloudFront to Stream HLS VideoAmazon Web Services
Learn how you can use Amazon CloudFront and JW Player to stream video in the HTTP Live Streaming Format to multiple devices. We will cover the encoding, storage and delivery of the video using AWS and will demonstrate how JW Player can be configured to play the content on your desktop and mobile devices.
Flink, Spark, and Storm are three popular streaming platforms compared on performance. A benchmark was created to simulate an advertising analytics pipeline with events streamed to Kafka. Flink and Storm had similar linear latency increases with throughput. Spark had higher latency due to micro-batching, but could handle higher throughput. At very high throughput, Storm performed best with acknowledgments disabled, while Flink provided low latency with processing guarantees. Overall, the platforms demonstrated tradeoffs between latency, throughput and exactly-once processing.
The document provides an introduction to web server technologies and HTTP. It discusses the role of web servers, an overview of HTTP including versions and the TCP/IP protocol stack. It also covers the basic HTTP request/response cycle, different types of proxy servers, and planning considerations for web server deployment including hosting options, server software selection, and sizing requirements.
The document summarizes different techniques for streaming media, including HTTP Live Streaming (HLS) and Real Time Streaming Protocol (RTSP). It then describes the architecture and process of HLS in detail over 4 steps:
1) The media is encoded and segmented by the encoder.
2) The segmenter splits the encoded media into short chunks and encrypts the segments if needed.
3) The distribution system stores the segments and playlists on an HTTP server.
4) The client downloads playlists and segments through HTTP and plays the media.
The document also compares RTSP and HLS, noting advantages of HLS like reliability, firewall traversal, and use on YouTube. It surveys different video-
Web services allow programs to call methods on other computers over a network. They are frequently web APIs that can be accessed remotely and executed on another system. Web services consist of method information describing the method being called and scoping information describing required arguments. This information is packaged and sent across the network using various protocols like HTTP, SOAP, and XML-RPC. The internet protocol stack, consisting of layers like application, transport, network and link, is used to break information into packets that can travel over the network to their destination and be reassembled.
Web services allow programs to communicate over a network by calling methods on remote systems. They are frequently web APIs that can be accessed over a network like the internet. A web service call packages method and scoping information into an envelope that is transported across the network using defined protocols like HTTP and TCP. At the destination, the same protocols unpack the envelope and call the requested method. Web servers store web pages and dynamic content, and respond to client requests over the internet using HTTP to deliver HTML files and other objects.
The document discusses internet video streaming versus IPTV and the challenges of streaming multimedia over the internet. It covers topics like the difference between internet video and IPTV, characteristics of multimedia streaming, challenges of UDP for streaming, and suggestions to improve streaming stability and quality of service. It suggests standardizing congestion control algorithms and using techniques like forward error correction to improve reliability of multimedia streams over UDP.
FTP (File Transfer Protocol) is a standard network protocol used to transfer files between computers over a TCP/IP network like the Internet. It uses separate connections for control commands and data transfer. FTP servers allow users to upload, download, and organize files. Setting up an FTP server involves installing FTP server software on a computer with a static IP address or domain name. This allows other users to access files by logging in anonymously or with a provided username and password. FTP clients are programs that users can install to connect to FTP servers and transfer files in either direction with drag-and-drop or other simple interfaces.
This document provides an introduction to dynamic web content and web application technologies. It discusses how web servers, browsers, HTML, CSS, JavaScript, and other technologies work together to deliver dynamic web pages and applications to users. Key points covered include how browsers make HTTP requests to servers, how servers respond with HTML documents, and how languages like JavaScript can be used to add interactivity to web pages. Network concepts like TCP connections, ports, and IP addresses are also briefly summarized.
Proxy servers act as an intermediary for requests from clients seeking resources from other servers. There are different types of proxy servers including cache proxies that speed up access and web proxies that allow users to connect to servers and access the internet. Proxy servers aim to provide privacy by hiding clients' IP addresses and allow access around content blocks. FTP and HTTP are protocols for transferring files and web pages respectively using the client-server model, with FTP using separate control and data connections and HTTP using request and response messages. Proxy servers can also be used with FTP and HTTP to add capabilities like caching, authentication, and traffic monitoring.
The document discusses streaming media technology which enables real-time distribution of audio, video, and multimedia over the Internet. Streamed data is transmitted by a server and received/displayed by client applications. There are advantages like steady service and on-demand access, but also disadvantages like difficulty maintaining steady service with low bandwidth and high maintenance costs for streaming servers. The document then describes different types of streaming including stored, live, and interactive audio/video. It also outlines four approaches to streaming using web servers and media servers with protocols like HTTP, RTSP, and RTP.
Internet, network basics. How web browsers work?
Client-Server Architecture. Local and remote servers
DNS, IP, ports and Sockets
Hostings
Useful utilities: ipconfig, ping, tracert, netstat
HTTP basics. Headers, methods, responses. Most common response statuses
اِنجیناِکس (به انگلیسی: nginx) یک کارساز وب با حجم پایین و کارایی بالا است که تحت مجوز بیاسدی منتشر میشود. این کارساز وب در یونیکس، گنو/لینوکس، بیاسدی، مک او اس و ویندوز اجرا میشود. بر طبق گفتهٔ نتکرافت، در حال حاضر ۱۲.۰۷٪ از دامنههای اینترنت از این کارساز استفاده میکنند.
این پروژه در سال ۲۰۰۱ بنیان نهاده شد و توسط یک توسعهدهنده مستقل به نام ایگور سیسووف (به انگلیسی: Igor Sysoev) به مرحله اجرا درآمد تا در یکی از وبسایتهای پرترافیک به نام رامبرلر به خدمت گرفته شود که این وبسایت در تاریخ سپتامبر ۲۰۰۸، روزانه بیش از ۵۰۰ میلیون درخواست HTTP داشته است. در حال حاضر وبسایتهای سرشناسی همچون فیسبوک، نتفلیکس، وردپرس، سورسفورج و ... از انجیناکس استفاده میکنند.[۶] در نسخه ۵٫۲ اوپنبیاسده که در نوامبر ۲۰۱۲ عرضه شد هم نرمافزار انجیناکس به صورت پیشفرض در سیستم قرار داده شد تا جایگزینی باشد برای آپاچی ۱٫۳. در نهایت در سال ۲۰۱۴ آپاچی از درخت کد منبع اوپنبیاسدی حذف شد.
This document provides an overview of applications and reliable transport basics. It discusses several common applications that use reliable sockets like Telnet, HTTP, BitTorrent and Skype. It also covers some of the challenges in building reliable transport, including dropping, duplicating and reordering of packets. The document outlines techniques used to provide reliability such as checksums, acknowledgements, timeouts and retransmissions. Finally, it introduces finite state machines and stop-and-wait models for reliable data transfer.
The document provides an overview of PHP and its capabilities compared to other web technologies. It discusses how PHP allows for dynamic content and user interactivity on websites, unlike static HTML. It also summarizes HTTP and the client-server model, and how PHP integrates as a common gateway interface (CGI) to enable server-side scripting. Key topics covered include the history of HTML/XHTML, HTTP request/response formats, and how PHP addresses limitations of static websites by running on the server-side.
The document provides definitions and explanations of various web technologies and protocols including:
- Internet, World Wide Web, URLs, TCP/IP, HTTP, IP addresses, packets, and HTTP methods which define how information is transmitted over the internet and web.
- Additional protocols covered are SSL, HTTPS, HTML, and cookies which establish secure connections and handle user sessions and data transmission.
The document discusses HTTP and web architectures. It begins with introductions from Nicolas Martignole and Quentin Adam. It then provides an overview of HTTP1 including that it is a text-based specification, uses simple requests and responses over TCP connections, and defines verbs like GET, POST, PUT, and DELETE. It discusses techniques for caching like Expires, Pragma, and Cache-Control headers. It also covers ETags for cache validation and content negotiation for serving multiple representations of resources.
Angelo van der Sijpt - How well do you know your network stack? - Codemotion ...Codemotion
The document provides an overview of the HTTP network protocol in its early stages of development. It summarizes the initial IMP (Interface Message Processor) software used to establish connections and transmit messages over the ARPANET. It outlines some early requirements for host-to-host software to enable simple and advanced use between computer systems. The document also describes the initial host software specifications, including establishing connections, transmitting data efficiently, and implementing error checking between connected systems. This was one of the first documents to define core aspects of the early HTTP network protocol to enable information exchange over the fledgling internet.
internet programming and java notes 5th sem mcaRenu Thakur
Format of an HTTP Request and Response
An HTTP request has three main components: the request line containing the method, URI, and protocol version; request headers with information about the client; and an optional request body. An HTTP response similarly has a status line with the protocol, status code, and description; response headers with server information; and an optional response body.
HTTP Request Types
Common HTTP request types include GET to retrieve a resource, HEAD to get headers only, POST to submit an enclosed entity to the identified resource, PUT to upload a representation of the resource, and DELETE to remove the resource.
FTP File Transfer
FTP is a standard protocol for transferring files between devices on the internet. It uses TCP
The document discusses HTTP request and response messages. Some key points:
- HTTP is a stateless, client-server protocol where clients send requests to servers and servers return response messages. Requests use methods like GET and POST and URLs to identify resources.
- Request messages contain a start line with the method, URL, and HTTP version, followed by header lines. Response messages contain a start line with the status code and reason, followed by header lines and an optional body.
- Common status codes include 200 for success, 404 for not found, 401 for unauthorized, and 500 for server errors.
- HTML forms can send data via GET by adding parameters to the URL or POST by placing them in the
Hear how to develop and implement WebRTC using the new IETF and W3C standards. This session will overview the concepts and structure of WebRTC and how it is defined in the emerging standards. The session will bring everyone up to a clear understanding of WebRTC for the technical discussions in the next session.
This workshop will include specific examples of how to code and create real-time interactions. The session will be interactive, allowing for open and clear discussion.
Similar to Http live streaming technical presentation (20)
Freshworks Rethinks NoSQL for Rapid Scaling & Cost-EfficiencyScyllaDB
Freshworks creates AI-boosted business software that helps employees work more efficiently and effectively. Managing data across multiple RDBMS and NoSQL databases was already a challenge at their current scale. To prepare for 10X growth, they knew it was time to rethink their database strategy. Learn how they architected a solution that would simplify scaling while keeping costs under control.
[OReilly Superstream] Occupy the Space: A grassroots guide to engineering (an...Jason Yip
The typical problem in product engineering is not bad strategy, so much as “no strategy”. This leads to confusion, lack of motivation, and incoherent action. The next time you look for a strategy and find an empty space, instead of waiting for it to be filled, I will show you how to fill it in yourself. If you’re wrong, it forces a correction. If you’re right, it helps create focus. I’ll share how I’ve approached this in the past, both what works and lessons for what didn’t work so well.
The Department of Veteran Affairs (VA) invited Taylor Paschal, Knowledge & Information Management Consultant at Enterprise Knowledge, to speak at a Knowledge Management Lunch and Learn hosted on June 12, 2024. All Office of Administration staff were invited to attend and received professional development credit for participating in the voluntary event.
The objectives of the Lunch and Learn presentation were to:
- Review what KM ‘is’ and ‘isn’t’
- Understand the value of KM and the benefits of engaging
- Define and reflect on your “what’s in it for me?”
- Share actionable ways you can participate in Knowledge - - Capture & Transfer
"Scaling RAG Applications to serve millions of users", Kevin GoedeckeFwdays
How we managed to grow and scale a RAG application from zero to thousands of users in 7 months. Lessons from technical challenges around managing high load for LLMs, RAGs and Vector databases.
"Frontline Battles with DDoS: Best practices and Lessons Learned", Igor IvaniukFwdays
At this talk we will discuss DDoS protection tools and best practices, discuss network architectures and what AWS has to offer. Also, we will look into one of the largest DDoS attacks on Ukrainian infrastructure that happened in February 2022. We'll see, what techniques helped to keep the web resources available for Ukrainians and how AWS improved DDoS protection for all customers based on Ukraine experience
AppSec PNW: Android and iOS Application Security with MobSFAjin Abraham
Mobile Security Framework - MobSF is a free and open source automated mobile application security testing environment designed to help security engineers, researchers, developers, and penetration testers to identify security vulnerabilities, malicious behaviours and privacy concerns in mobile applications using static and dynamic analysis. It supports all the popular mobile application binaries and source code formats built for Android and iOS devices. In addition to automated security assessment, it also offers an interactive testing environment to build and execute scenario based test/fuzz cases against the application.
This talk covers:
Using MobSF for static analysis of mobile applications.
Interactive dynamic security assessment of Android and iOS applications.
Solving Mobile app CTF challenges.
Reverse engineering and runtime analysis of Mobile malware.
How to shift left and integrate MobSF/mobsfscan SAST and DAST in your build pipeline.
This talk will cover ScyllaDB Architecture from the cluster-level view and zoom in on data distribution and internal node architecture. In the process, we will learn the secret sauce used to get ScyllaDB's high availability and superior performance. We will also touch on the upcoming changes to ScyllaDB architecture, moving to strongly consistent metadata and tablets.
Main news related to the CCS TSI 2023 (2023/1695)Jakub Marek
An English 🇬🇧 translation of a presentation to the speech I gave about the main changes brought by CCS TSI 2023 at the biggest Czech conference on Communications and signalling systems on Railways, which was held in Clarion Hotel Olomouc from 7th to 9th November 2023 (konferenceszt.cz). Attended by around 500 participants and 200 on-line followers.
The original Czech 🇨🇿 version of the presentation can be found here: https://www.slideshare.net/slideshow/hlavni-novinky-souvisejici-s-ccs-tsi-2023-2023-1695/269688092 .
The videorecording (in Czech) from the presentation is available here: https://youtu.be/WzjJWm4IyPk?si=SImb06tuXGb30BEH .
LF Energy Webinar: Carbon Data Specifications: Mechanisms to Improve Data Acc...DanBrown980551
This LF Energy webinar took place June 20, 2024. It featured:
-Alex Thornton, LF Energy
-Hallie Cramer, Google
-Daniel Roesler, UtilityAPI
-Henry Richardson, WattTime
In response to the urgency and scale required to effectively address climate change, open source solutions offer significant potential for driving innovation and progress. Currently, there is a growing demand for standardization and interoperability in energy data and modeling. Open source standards and specifications within the energy sector can also alleviate challenges associated with data fragmentation, transparency, and accessibility. At the same time, it is crucial to consider privacy and security concerns throughout the development of open source platforms.
This webinar will delve into the motivations behind establishing LF Energy’s Carbon Data Specification Consortium. It will provide an overview of the draft specifications and the ongoing progress made by the respective working groups.
Three primary specifications will be discussed:
-Discovery and client registration, emphasizing transparent processes and secure and private access
-Customer data, centering around customer tariffs, bills, energy usage, and full consumption disclosure
-Power systems data, focusing on grid data, inclusive of transmission and distribution networks, generation, intergrid power flows, and market settlement data
Dandelion Hashtable: beyond billion requests per second on a commodity serverAntonios Katsarakis
This slide deck presents DLHT, a concurrent in-memory hashtable. Despite efforts to optimize hashtables, that go as far as sacrificing core functionality, state-of-the-art designs still incur multiple memory accesses per request and block request processing in three cases. First, most hashtables block while waiting for data to be retrieved from memory. Second, open-addressing designs, which represent the current state-of-the-art, either cannot free index slots on deletes or must block all requests to do so. Third, index resizes block every request until all objects are copied to the new index. Defying folklore wisdom, DLHT forgoes open-addressing and adopts a fully-featured and memory-aware closed-addressing design based on bounded cache-line-chaining. This design offers lock-free index operations and deletes that free slots instantly, (2) completes most requests with a single memory access, (3) utilizes software prefetching to hide memory latencies, and (4) employs a novel non-blocking and parallel resizing. In a commodity server and a memory-resident workload, DLHT surpasses 1.6B requests per second and provides 3.5x (12x) the throughput of the state-of-the-art closed-addressing (open-addressing) resizable hashtable on Gets (Deletes).
What is an RPA CoE? Session 1 – CoE VisionDianaGray10
In the first session, we will review the organization's vision and how this has an impact on the COE Structure.
Topics covered:
• The role of a steering committee
• How do the organization’s priorities determine CoE Structure?
Speaker:
Chris Bolin, Senior Intelligent Automation Architect Anika Systems
In the realm of cybersecurity, offensive security practices act as a critical shield. By simulating real-world attacks in a controlled environment, these techniques expose vulnerabilities before malicious actors can exploit them. This proactive approach allows manufacturers to identify and fix weaknesses, significantly enhancing system security.
This presentation delves into the development of a system designed to mimic Galileo's Open Service signal using software-defined radio (SDR) technology. We'll begin with a foundational overview of both Global Navigation Satellite Systems (GNSS) and the intricacies of digital signal processing.
The presentation culminates in a live demonstration. We'll showcase the manipulation of Galileo's Open Service pilot signal, simulating an attack on various software and hardware systems. This practical demonstration serves to highlight the potential consequences of unaddressed vulnerabilities, emphasizing the importance of offensive security practices in safeguarding critical infrastructure.
How information systems are built or acquired puts information, which is what they should be about, in a secondary place. Our language adapted accordingly, and we no longer talk about information systems but applications. Applications evolved in a way to break data into diverse fragments, tightly coupled with applications and expensive to integrate. The result is technical debt, which is re-paid by taking even bigger "loans", resulting in an ever-increasing technical debt. Software engineering and procurement practices work in sync with market forces to maintain this trend. This talk demonstrates how natural this situation is. The question is: can something be done to reverse the trend?
9. How it works? ...
Feed data to the ffserver using ffmpeg.
FFserver sends the received data to the
request source.
Request
http://<ip address>:<port>/<feedfile>
ffmpeg -i v4l2 /dev/video0
http://localhost:8090/livestream.ffm
10. How it works? ...
Response
http://<ip address>:<port>/<request url>
<video>
<source src="http://localhost:8090/livestream">
</video
11. How it works? ...
ffserver.conf
Port 8090
MaxHTTPConnections 2000
MaxBandwidth 1000
CustomLog -
<Feed livestream.ffm>
File /tmp/feed1.ffm
FileMaxSize 200K
ACL allow 127.0.0.1
</Feed>
<Stream livestream>
Format webm
Feed livestream.ffm
VideoCodec libvpx
VideoFrameRate 30
VideoBitRate 512
VideoSize 320x240
AVOptionVideo preset medium
AudioCodec libvorbis
AudioBitRate 128
AudioChannels 2
</Stream>