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Erlang in 100 Seconds - YouTube (www.youtube.com)

Concurrency functional programming message passing fault tolerance Erlang programming Ericsson BEAM

Erlang, a functional, fault-tolerant programming language, was designed at Ericsson in 1986 for large-scale concurrent systems. Its development was propelled by the need to enhance telecommunications infrastructure, leading to the creation of the BEAM virtual machine. Erlang’s unique programming model enables efficient handling of millions of concurrent processes with minimal overhead, ensuring system resilience through process isolation and hot code swapping. Today, Erlang continues to underpin modern languages and systems, demonstrating significant influence in the programming community.
Main Points
- Fault ToleranceErlang is known for its fault tolerance, facilitated through process isolation and a philosophy of allowing individual processes to fail without impacting the whole.
- BEAM Virtual Machine ImportanceErlang's BEAM virtual machine allows for millions of concurrent processes with low overhead, and is still in use by modern languages like Elixir.
- Message Passing ModelErlang's programming model, which emphasizes message passing, is critical for its ability to handle billions of messages daily across various platforms.
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Designing Concurrent Systems on the BEAM (happihacking.com)

development Erlang Elixir architecture design processes BEAM Concurrency Actor model system design maintainability Technology

Designing concurrent systems on the BEAM involves leveraging its concurrency model, rooted in the actor model, for process isolation and communication. A fundamental understanding that processes are not equated with code, and visualization strategies like considering processes as workers, are pivotal for system design. Key strategies include clear task allocation, flow-based structuring, and understanding process archetypes. Structuring code according to business domains further aligns technical solutions with business strategy, promoting maintainable and scalable system architecture.
Main Points
- Overview of BEAM's Concurrency ModelThe BEAM's concurrency model, rooted in the actor model, focuses on lightweight, isolated processes communicating through message passing, fostering system resilience and maintainability.
- Clearing Misconceptions: Processes ≠ CodeMisinterpretation of processes as code can obscure the understanding of BEAM's concurrency model, but recognizing their separation illuminates design considerations for concurrency.
- Visualizing Processes for Better UnderstandingPersonifying processes as gnomes offers a tangible understanding of their independent operation, state management, and communication, enriching the conceptual grasp of concurrent system design on BEAM.
- Key Design Strategies for Concurrent SystemsTask allocation based on responsibility, structuring systems around data flow, and categorizing processes according to specific archetypes are critical strategies for designing concurrent systems on BEAM.
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