If the numbers are unique you could use a bitmap-sort this way you could 
easily read just parts of the file at a time.

If they aren't unique it gets a bit trickier.

/L

dinesh bansal wrote:
> Hi All,
>
> Suppose I have a big file (~100M) containing integer data. I want to sort
> this file. The problem is I don't want to load the complete file data into
> main memory in one shot. I mean I can read the file in batches and sort the
> batch and save it in another file but cannot store the entire file contents
> in main memory. Can somebody help me with algorithm or pseudo code?
>
> Thanks in advance.
>   

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