Sflow input stream and parallel

[Łukasz Matys]

Hello.
I use an sflowtool to collect sflow data like below, and next grep some things 
for example:

# cat aaa.txt
8.8.8.8
8.8.4.4
# 

# sflowtool -p 6000 -l +v 250 | grep -f aaa.txt
FLOW,10.10.10.10,1030,1024,f6b52f7a0ccd,000c3116381b,0x0800,250,0,8.8.8.8,91.232.38.10,17,0x00,52,53,1188,0x10,192,170,16384
FLOW,10.10.10.10,1025,1030,003088117faa,f6b52f7a0ccd,0x0800,250,0,109.196.0.2,8.8.8.8,17,0x00,59,7366,53,0x00,101,79,16384
FLOW,10.10.10.10,1027,1030,d4ca6d78364d,f6b52f7a0ccd,0x0800,250,0,88.199.95.5,8.8.4.4,17,0x00,62,3557,53,0x10,87,65,16384
FLOW,10.10.10.10,1003,1031,dc38e111a008,f6b52f7a0ccd,0x0800,250,0,82.160.41.112,8.8.4.4,1,0x00,122,3,3,0x10,136,114,16384
FLOW,10.10.10.10,1002,1031,10f3112ff3e5,f6b52f7a0ccd,0x0800,250,0,46.77.91.27,8.8.8.8,1,0x00,59,3,1,0x10,249,227,16384
FLOW,10.10.10.10,1017,1031,001d7173f780,f6b52f7a0ccd,0x0800,250,0,185.23.21.52,8.8.4.4,17,0x00,61,9911,53,0x00,114,92,16384
^C

I have read all documentation and can not achieve the same result using 
'parallel'.

# /usr/local/sflowtool/bin/sflowtool -p 6000 -l +v 250 | parallel --pipe grep 
-f aaa.txt
Academic tradition requires you to cite works you base your article on.
When using programs that use GNU Parallel to process data for publication
please cite:

  O. Tange (2011): GNU Parallel - The Command-Line Power Tool,
  ;login: The USENIX Magazine, February 2011:42-47.

This helps funding further development; and it won't cost you a cent.
If you pay 10000 EUR you should feel free to use GNU Parallel without citing.

To silence the citation notice: run 'parallel --bibtex'.

^C

No output data ;-(.
Any ideas?

Best regards.

--
Lukasz

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