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

Wed Apr 20 22:24:01 BST 2016

All,

Does the unit of measure for *all* fields default to the same as if you ran the command without “-Y”?  For example:

mmlsquota:user:HEADER:version:reserved:reserved:filesystemName:quotaType:id:name:blockUsage:blockQuota:blockLimit:blockInDoubt:blockGrace:filesUsage:filesQuota:filesLimit:filesInDoubt:filesGrace:remarks:fid:filesetname:

blockUsage, blockLimit, and blockInDoubt are in KB, which makes sense, since that’s the default.  But what about blockGrace if a user is over quota?  Will it also contain output in varying units of measure (“6 days” or “2 hours” or “expired”) just like without the “-Y”?

I think this points to Bryan being right “-Y” should be documented somewhere / somehow.  Thanks…

Kevin

On Apr 20, 2016, at 4:12 PM, Jez Tucker <jtucker at pixitmedia.com<mailto:jtucker at pixitmedia.com>> 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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