Messaging With Erlang And Jabber

Jun 15, 200730 likes4,571 views

Erlang and XMPP can be used together in several ways: 1. Erlang is well-suited for implementing XMPP servers due to its high concurrency and reliability. ejabberd is an example of a popular Erlang XMPP server. 2. The XMPP protocol can be used to connect Erlang applications and allow them to communicate over the XMPP network. Libraries like Jabberlang facilitate writing Erlang XMPP clients. 3. XMPP provides a flexible messaging backbone that can be extended using Erlang modules. This allows Erlang code to integrate with and enhance standard XMPP server functionality.

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Stackless Python In Evel xf

Stackless Python is used extensively in EVE Online to provide cooperative multitasking. It allows tasks to be split across multiple tasklets that run concurrently without preemption. Channels are used to synchronize tasklets in a way similar to coroutines. This approach allows EVE's massive multiplayer server to handle over 120,000 concurrent users on a single database shard using Stackless Python's lightweight tasklets and channels for communication and synchronization.

Comparing Cpp And Erlang For Motorola Telecoms Softwarel xf

The document summarizes research comparing the programming languages C++ and Erlang for developing distributed telecom software. Two telecom components, a data mobility component and dispatch call controller, were reengineered in Erlang and C++. The Erlang implementations were found to be more robust and resilient to failures, have higher productivity through significantly less code, and could meet performance requirements while providing dynamic reconfiguration capabilities. Some performance penalties and higher memory usage were observed for the Erlang components that interfaced with C code and libraries. The research concluded Erlang is suitable for telecom software development by providing robustness, productivity and ability to specify required functionality.

The Migration From Erlang To Otp A Case Study Of A Heavy Duty Tcpip Clients...l xf

IDEALX developed an instant messaging server for a large French ISP using Erlang. Their initial prototype handled 900 simultaneous users but had performance and reliability issues. After an external code and architecture review, it was discovered that they were not using OTP behaviors and principles. With training on OTP and a code rewrite following OTP design patterns, they were able to improve performance and reduce code by 50%. The key lesson was that OTP behaviors and principles fill an important gap for structuring Erlang programs, but this is not obvious for new Erlang developers.

Improving Robustness In Distributed Systemsl xf

1) The document discusses improving robustness in distributed Erlang systems through the use of clusters of cooperating hosts connected by a high-speed network. 2) It addresses issues like network partitioning and the Erlang multi-homing problem where connections between nodes can be lost. 3) Several techniques are proposed to make the system more fault-tolerant such as using loopback interfaces, static routing, and a custom routing protocol to maintain connections between nodes when primary network links fail.

Concurrency And Erlangl xf

The document discusses the challenges of shared state concurrency using threads and how Erlang addresses these issues using message passing concurrency without shared state. It provides examples of war stories from developers struggling with threads and priority inversion issues. Erlang allows for easy concurrency through message passing between processes using features like Mnesia distributed database and hot code reloading. This model maps better to representing objects as independent actors. Erlang has been successfully used in large telecom systems requiring high reliability.

Learning Erlang And Developing A Sip Server Stack With 30k Potential Usersl xf

The document discusses developing a SIP server and stack for Stockholm University with 30,000 potential users using the Erlang programming language. It provides background on the university's telephony systems over time and describes implementing a SIP server called Yxa in Erlang. The implementation uses the OTP supervisor model and has 15,000 lines of code. Plans are discussed to build distributed SIP servers for routing and call services for students using the open source Yxa stack.

A Virtual World Distributed Server Developed In Erlang As A Tool For Analysin...l xf

This document discusses the development of a prototype virtual world distributed server in Erlang to analyze the needs of massively multiplayer online game servers. It describes some key problems for MMOG servers, how Erlang was used to quickly prototype solutions, and tests conducted on architectures with different node configurations. The tests aimed to determine the maximum supported number of players and identify issues causing desynchronization between clients and servers. The prototype was found to be effective for rapidly exploring algorithms and architectures for distributed MMOG systems.

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Erlang Message Passing Concurrency, For The Winl xf

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Comparing Cpp And Erlang For Motorola Telecoms Softwarel xf

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