Hello!

I'm using KMeans mahout-0.4 and I face some problems when trying to add compression option in command line.

I've tried both "-D mapred.output.compress=true" and "-Dmapred.output.compress=true", but neither works and there's an error message "ERROR common.AbstractJob: Unexpected -Dmapred.output.compress=true while processing Job-Specific Options".

Additionally, I saw a comment in AbstractJob.java written " * <li>-Dmapred.output.compress={true,false}: Compress final output (default true)</li>
". But in my test, the output is uncompressed.

I've also tried to update MahoutDriver.java to the latest version and recompile mahout core, but i still can't solve the problem.

Can anyone give me some help? Thanks in advance!

Best regards,
Qiuyan Xu

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