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I'm trying to create an arbitrary sized(but not infinite) 2d tilebased world. My question is, how do i save a world like this?

My idea was to split up the tiles into bigger chunks and then save those seperately. Let's say you have a world of 5000x5000 tiles, each chunk would be 50x50 and saved in a seperate file. This leaves me with 10000 seperate files, which does not seem optimal. Is there a better way?

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This is usually ideal - you can also further decide to split things into 'regions'. This is pretty similar to how Minecraft does things and you can probably learn a lot from just examining it. Splitting it into multiple file sis ideal because while it does incur a penalty for opening the file still, it makes things manageable and prevents large seeking times on a single large file on slower drives. You can read up on this post here for more information on the method. Essentially, what you had in mind is a good idea - just try and minimize chunks into optimal amounts. Good luck!

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What are adventages of many-files approach versus NoSQL database? –  krzat Feb 2 '13 at 16:35
    
This is basically what i thought too, but it still gives me lots and lots of small files, while minecraft only has one level.dat file. How is that done? –  user1895420 Feb 2 '13 at 16:53
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Level.dat is just an index. Read up on the file format and check out the open source InfiniMiner –  Vaughan Hilts Feb 2 '13 at 17:51

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