The Actor Model, implemented through Akka in Java, provides an efficient solution for building high-scale, non-blocking systems. By representing tasks as lightweight actors, each requiring threads only briefly, the system avoids bottlenecks associated with traditional thread-based models. Instead of managing thousands of virtual machines, as PayPal did, the Actor Model reduces the necessary infrastructure to a few resources, maximizing concurrency and minimizing errors. The model allows for the management of thousands of actors with a limited number of threads, significantly improving system performance and responsiveness.
The Actor Model allows systems to operate more efficiently by utilizing a large number of lightweight actors, freeing threads between requests, resulting in greater concurrency.
The traditional thread-based architecture struggles with scalability, as seen in PayPal's initial reliance on 1000 virtual machines, leading to maintenance challenges and errors.
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