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=== Key Features === The Erlang VM boasts several key features that make it exceptionally suited for concurrent and distributed systems: ==== Lightweight Processes ==== At the core of the Erlang VM are lightweight processes known as **Erlang Processes**. These processes are extremely efficient, with a minimal memory overhead, allowing thousands of concurrent processes to be created and managed effortlessly. ==== OTP Framework ==== The **OTP (Open Telecom Platform) framework** is built into the Erlang VM, offering a set of libraries, tools, and design principles for developing highly reliable and fault-tolerant systems. OTP provides solutions for tasks such as process supervision, fault recovery, distribution, and code upgrading. ==== Message Passing ==== Erlang VM facilitates communication between processes through **message passing**. Processes can exchange messages freely, enabling seamless concurrency, parallelism, and distribution. This lightweight, asynchronous communication mechanism is the basis for building fault-tolerant applications. ==== Garbage Collection ==== The VM employs a sophisticated **garbage collector**, capable of efficiently reclaiming memory while preserving the responsiveness and overall performance of the system. The garbage collection algorithms implemented in the Erlang VM are specifically designed to handle the characteristics of concurrent and distributed applications. ==== Hot Code Upgrades ==== One of the most unique features of the Erlang VM is its support for **hot code upgrades**. This means that applications running on the VM can be upgraded on the fly without interrupting the system or losing any messages or processes. This powerful capability ensures uninterrupted operation and seamless evolution of running systems.
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