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== Distributed Systems == [[File:Distributed Systems logo.png|thumb|Distributed Systems logo]] '''Distributed systems''' are a fundamental concept in the field of computer science, where multiple autonomous computers work together to achieve a common goal. In the context of [[Elixir (programming language)|Elixir]], distributed systems play a crucial role in building robust, scalable, and fault-tolerant applications. === Overview === At its core, Elixir provides built-in support for creating and managing distributed systems through its implementation of the [[Erlang Programming Language|Erlang]] [[Concurrency|concurrency model]]. This powerful model allows processes to communicate and share data seamlessly across multiple machines, forming a distributed network of nodes. === Key Concepts === ==== Concurrency ==== Concurrency in Elixir is achieved through lightweight processes, also known as actors. Each process runs independently and communicates via message passing, resulting in highly concurrent and responsive systems. ==== Fault Tolerance ==== Elixir embraces the "let it crash" philosophy, wherein faults and errors are anticipated and handled rather than being avoided entirely. Through the use of supervisors and the supervision tree, Elixir provides mechanisms to isolate and recover from failures, ensuring the overall system remains operational. ==== Distribution ==== Elixir's distribution capabilities enable the creation of distributed systems by seamlessly connecting multiple nodes. Nodes communicate with each other using a built-in protocol known as [[Distributed Erlang|distribunode]]. This allows for transparent communication and distribution of processes across different machines. === Building Distributed Systems in Elixir === When building distributed systems in Elixir, several key components and libraries are available to ease the development process: ==== `:gen_server` ==== The `:gen_server` behavior in Elixir is used to define a server process that maintains state and handles client requests. It provides a foundation for building fault-tolerant and scalable distributed systems. ==== `:global` ==== The `:global` module provides a simple mechanism for registering and locating processes across a distributed network. It allows processes to be identified across different nodes, facilitating communication and coordination. ==== `:rpc` ==== The `:rpc` module enables remote procedure calls (RPC) between nodes in a distributed system. It provides a unified interface for invoking functions on remote nodes, abstracting away the details of distributed communication. === Case Studies === ==== Distributed Key-Value Store ==== A distributed key-value store is a common use case in distributed systems. It allows for efficient data storage and retrieval across multiple nodes. In Elixir, libraries like [[:mecks:keyvlaue|:mecks:keyvalue]] provide a convenient way to implement distributed key-value stores. ==== Messaging Systems ==== Messaging systems are widely used in distributed systems for exchanging information between components. Elixir's built-in support for message passing makes it an excellent choice for building high-performance and fault-tolerant messaging systems. === See Also === * [[Erlang Programming Language|Erlang]] - The language on which Elixir is built, offering a powerful foundation for building distributed systems. === External Links === * [https://elixir-lang.org/docs Distributed Elixir Documentation] - Official documentation on building distributed systems in Elixir. * [https://github.com/elixir-lang/elixir Elixir on GitHub] - The official Elixir repository for the latest source code and updates. == References ==
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