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It's stated plainly and prominently in http://www.mongodb.org/downloads that 32-bit version is limited to 2GB. It's mentioned elsewhere in the documentation, but the OP didn't bother to read them. "A gem and two lines" and it worked, so he expected it to work forever. That's not how engineers usually work. Most of the time, they over-engineer, not the other way around! They research the hell out of any new technology they want to use. I'm definitely less talented than OP and others on HN, but even I know a hell of a lot about Redis, MongoDB and CouchB, and I haven't even started to write a line of code.

And anyone who has read more than an introduction to mongo knows that you SHOULD use getLastError to be safe. If you do that, no data will be dropped.

I think they need to change the word "limit". This is what "limit" means:

    [root@li321-238 tmp]# dd if=/dev/zero of=./filesystem bs=1M count=128
    [root@li321-238 tmp]# mkfs.ext2 filesystem 
    [root@li321-238 tmp]# mount -o loop filesystem myfilesystem
    [root@li321-238 tmp]# dd if=/dev/zero of=myfilesystem/im_too_large bs=1M count=129
    dd: writing `myfilesystem/im_too_large': No space left on device
that is, a "limit" means, the program stops, complains. It's "limited".

A program that continues along without issue, only changing its behavior in some unannounced (documented or not) way, is not "limited". It's free as a bird.


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