[gpfsug-discuss] Did you know about "-Y" ?? I sure didn't... game changer

Wed Apr 20 23:06:18 BST 2016

+1 to a real python API.

We have written our own, albeit incomplete, library to expose most of what we need.  We would be happy to share some general ideas on what should be included, but a real IBM implementation wouldn't have to do what we did. (Think lots of subprocess.Popen + subprocess.communicate and shredding the output of mm commands.  And yes, we wrote a parser which could shred the output of either -Y or tabular format.)

Thx
Paul

From: gpfsug-discuss-bounces at spectrumscale.org [mailto:gpfsug-discuss-bounces at spectrumscale.org] On Behalf Of Barry Evans
Sent: Wednesday, April 20, 2016 5:58 PM
To: gpfsug-discuss at spectrumscale.org
Subject: Re: [gpfsug-discuss] Did you know about "-Y" ?? I sure didn't... game changer

Someone should just make a python API that just abstracts all of this
On 20/04/2016 22:18, Jez Tucker wrote:
So mmlspool does in 4.1.1.3... perhaps my memory fails me.
I'm pretty certain Yuri told me that mmlspool was completely unsupported and didn't have -Y a couple of years ago when we did the original GPFS UG RFEs prior to 4.x.  I figure that earns cookies.

Perhaps in light of the mmbackup thread; "Will fix RFEs for cookies?".  Name your price ;-)

Jez
On 20/04/16 22:12, Jez Tucker wrote:
Indeed.

jtucker at elmo:~$ mmlsfs all -Y
mmlsfs::HEADER:version:reserved:reserved:deviceName:fieldName:data:remarks:

I must say I've not seen any headers increment above 0:1 since ... er .. 3.3(?), so they're pretty static.

Now, if only mmlspool supported -Y ... or if _all_ commands supported -Y, I might even FedEX beer.

Jez

On 20/04/16 21:46, Bryan Banister wrote:
What's nice is that the "-Y" output provides a HEADER so that you can still programmatically determine fields of interest... this is the best!

I recommend adding "-Y" option documentation to all supporting GPFS commands for others to be informed.
-Bryan

From: gpfsug-discuss-bounces at spectrumscale.org<mailto:gpfsug-discuss-bounces at spectrumscale.org> [mailto:gpfsug-discuss-bounces at spectrumscale.org] On Behalf Of Barry Evans
Sent: Wednesday, April 20, 2016 3:39 PM
To: gpfsug-discuss at spectrumscale.org<mailto:gpfsug-discuss at spectrumscale.org>
Subject: Re: [gpfsug-discuss] Did you know about "-Y" ?? I sure didn't... game changer

If you build a monitoring pipeline using -Y output, make sure you test between revisions before upgrading. The columns do have a tendency to change from time to time.

Cheers,
Barry
On 20/04/2016 20:02, Bryan Banister wrote:
Apparently, though not documented in man pages or any of the GPFS docs that I've read (at least that I recall), there is a "-Y" option to many/most GPFS commands that provides output in machine readable fashion....

That's right kids... no more parsing obscure, often changed output columns with your favorite bash/awk/python/magic.

Why IBM would not document this is beyond me,
-B

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Jez Tucker
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www.pixitmedia.com<http://www.pixitmedia.com>

--
Jez Tucker
Head of Research & Development
Pixit Media
Mobile: +44 (0) 776 419 3820
www.pixitmedia.com<http://www.pixitmedia.com>

[http://pixitmedia.com/sig/sig-cio.jpg]
This email is confidential in that it is intended for the exclusive attention of the addressee(s) indicated. If you are not the intended recipient, this email should not be read or disclosed to any other person. Please notify the sender immediately and delete this email from your computer system. Any opinions expressed are not necessarily those of the company from which this email was sent and, whilst to the best of our knowledge no viruses or defects exist, no responsibility can be accepted for any loss or damage arising from its receipt or subsequent use of this email.

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