Thanks Peter.

> The resulting file of your command is not compressed. Use -z in order to 
> compress the output.
> To compress the existing file, run ./nfdump -j netflow_dump.20120606
> This should considerably shrink the size.
> Maybe I should make compression the default, as compatibility to those 
> uncompressed days is long back ....


Did as you suggested, and the file reduced to ~1.7Gb, which is a huge 
improvement, but I am unable to run nfdump on that file (unable as in it has 
now been running for nearly 24hours, with load average of 4.7), this was with a:

nfdump  -R netflow_dump.20120606 -a| more

but, if I run something like:

nfdump  -R netflow_dump.20120606  'dst net 10.1.1.0/24' -s srcip/bytes -s 
dstip/bytes -s port/bytes -s record/bytes  -n 20| more

completes in ~20 seconds?

Very new to nfdump, so the above may be expected behaviour?

Cheers.                                           
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