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POMultiple NIO reactors, or just one?
 

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  1. POMultiple NIO reactors, or just one?
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    <p>I've currently been reading up on Java NIO and have made some implementations of it myself in the past. However, I've never really though about the performance of a server -- which seems really silly, and it is. I've heard people say that a single-threaded reactor is just fine, but I really want to take advantage of the cores that I have. </p> <p>Since the implementation I'd be making of it is a game, there's some game logic threads as well, so it can't take up a lot of threads -- if anything, it would probably be just two.</p> <p>Here's the plot that I've come up with:</p> <ul> <li>High-priority reactor <ol> <li>Accepts connections</li> <li>Handles the game's log-in process (client sends packet, server processes, server sends response packet, not a ton of data here)</li> <li>Distributes resource file data on demand (the game is built so the server sends data that the client stores in a cache that contains almost all the resources of the game. Most of this is done when they are loading the game, but a lot still happens in the background as the play)</li> </ol></li> <li>Standard reactor <ol> <li>Reads and responds to in-game packets; these are often small, but there are a lot of them, seeing as just about everything a player does is distributed as a packet, and I want to scale it well to handle well around ~200 players)</li> </ol></li> </ul> <p>Goals:</p> <ul> <li>Scale well for about 200-300 players</li> <li>Respond to game packets quickly</li> <li>Distribute the aforementioned file data quickly</li> <li>Accept connections quickly</li> </ul> <p>Also, if you are familiar with it, the game is RuneScape. My goal is emulation of RuneScape's official server software so mine can be used with one of their clients. It's a popular practice -- see <a href="http://www.runelocus.com" rel="nofollow">www.runelocus.com</a>, <a href="http://www.rune-server.org" rel="nofollow">www.rune-server.org</a>, i.e.</p> <p>My question is: do you think this would be a good implementation? Is just having one reactor a better idea? Or should I be using more? I would guess the data received and sent would be roughly the same, maybe a little more on the high-priority reactor (which is why it's high-priority.) </p> <p>Also, when I define it as high-priority, I'm not actually literally prioritising it over the standard reactor. It's just handling tasks that are considered more important than game packets. </p> <p>Any feedback is greatly appreciated :) If there's any clarification/explanation needed, lemme know!</p>
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