Very similar to code I wrote for a like project. I found that if there was a huge amount of data that it would bog the machine down. The way I found around this was to work with sorted data (using the Unix sort command) and then to buffer the input by reading from the first file for many lines, then go to the second file and output all the matching lines and keep reading in the second file until you fill your buffer, go to the first, etc...

Note, I was working with data I knew and I was able to tune the buffering for the machine it ran on.

In reply to Re: Re: Combining Files by lemming
in thread Combining Files by ImpalaSS

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