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

[Jonathon A Anderson]

Looks great. I look forward to its maturity.

~jonathon


On 3/28/17, 10:22 AM, "gpfsug-discuss-bounces at spectrumscale.org on behalf of Luis Bolinches" <gpfsug-discuss-bounces at spectrumscale.org on behalf of luis.bolinches at fi.ibm.com> wrote:

    Hi
     
    While I understand the frustration of tiem that could be used otherwise. depending of what you are plannig with script wrapping I would recommend you seriously take a look to the REST API
     
    http://files.gpfsug.org/presentations/2017/Ehningen/23_-_SSUG17DE_-_Alexander_Wolf-Reber_-_Spectrum_Scale_ReST_API.pdf
    
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    ----- Original message -----
    From: Jonathon A Anderson <jonathon.anderson at colorado.edu>
    Sent by: gpfsug-discuss-bounces at spectrumscale.org
    To: gpfsug main discussion list <gpfsug-discuss at spectrumscale.org>
    Cc:
    Subject: Re: [gpfsug-discuss] -Y option for many commands, precious few officially!
    Date: Tue, Mar 28, 2017 7:17 PM
     
    I had a bit of a run-in with a gpfs developer at a conference once when I complained about how command output changes frequently, breaking customer scripts. He was confused why we weren’t
     using `-Y`, and didn’t believe me that it’s simply not documented anywhere!
    
    `-Y` output is essential for interfacing programmatically with GPFS, and I don’t understand why it’s not mentioned in any of the guides or manpages. (Though apparently, according to this thead, it’s since appeared in some newer manpages.)
    
    ~jonathon
    
    
    On 3/28/17, 10:14 AM, "gpfsug-discuss-bounces at spectrumscale.org on behalf of Marc A Kaplan" <gpfsug-discuss-bounces at spectrumscale.org on behalf of makaplan at us.ibm.com> wrote:
    
        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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