[gpfsug-discuss] -Y option for many commands, precious few officially!

Simon Thompson (Research Computing - IT Services) S.J.Thompson at bham.ac.uk
Tue Mar 28 17:37:12 BST 2017


I thought the header rows defined what the format of the output was. Its a bit weird as there can be multiple header rows for different content rows ...

Simon

From: <gpfsug-discuss-bounces at spectrumscale.org<mailto:gpfsug-discuss-bounces at spectrumscale.org>> on behalf of Marc A Kaplan <makaplan at us.ibm.com<mailto:makaplan at us.ibm.com>>
Reply-To: "gpfsug-discuss at spectrumscale.org<mailto:gpfsug-discuss at spectrumscale.org>" <gpfsug-discuss at spectrumscale.org<mailto:gpfsug-discuss at spectrumscale.org>>
Date: Tuesday, 28 March 2017 at 17:14
To: "gpfsug-discuss at spectrumscale.org<mailto:gpfsug-discuss at spectrumscale.org>" <gpfsug-discuss at spectrumscale.org<mailto:gpfsug-discuss at spectrumscale.org>>
Subject: Re: [gpfsug-discuss] -Y option for many commands, precious few officially!

Just looking/scanning the latest (4.2.2) Spectrum Scale Command (and Programming) Reference I only found a few commands that officially are documented as supporting a -Y option:  mmnfs, mmsmb, mmuserauth.

But as many of you have discovered, -Y is accepted and yields "interesting" output for many of the mmXXXX commands.
Moreover the output *seems to* have easily discernible patterns that can be parsed by simple programs.

I believe there is no guarantee that the exact command output formats will not change from release to release, so, as a practical matter, if you're going to parse command output, you're probably better off parsing the -Y output, even if that is not officially supported.

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