[gpfsug-discuss] mmchfileset syntax

[Daniel Kidger]

Richard,

The documentation says that that you can simply use ‘mv’ on a live fileset too.
I have just tried this and yes it appears to work. I can move a fileset into another subdirectory of the same filesystem and mmlsfileset confirms the new mount point.


Daniel


 

 
 	
Dr Daniel Kidger 
IBM Technical Sales Specialist
Software Defined Solution Sales

+ 44-(0)7818 522 266 
daniel.kidger at uk.ibm.com

> On 3 Jan 2018, at 12:37, Sobey, Richard A <r.sobey at imperial.ac.uk> wrote:
> 
> Ah. So I can specify “device filesetname” OR “device -J junctionpath” (and mmchfileset gets the filesetname from that).
>  
> Ultimately though I cannot change the mount point of the fileset without mmunlink / mmlink, right?
>  
> Thanks
> Richard
>  
>  
> From: gpfsug-discuss-bounces at spectrumscale.org [mailto:gpfsug-discuss-bounces at spectrumscale.org] On Behalf Of Daniel Kidger
> Sent: 03 January 2018 11:50
> To: gpfsug main discussion list <gpfsug-discuss at spectrumscale.org>
> Subject: Re: [gpfsug-discuss] mmchfileset syntax
>  
> -J is to define which fileset you are talking about.
> The alternative is give the fileset name straight after the ‘device’ argument.
>  
> Once the fileset is unambiguous, you then use other command line option to change things
> e.g. -j to change the *name* of this fileset.
> -j doesn’t change the mount point, and indeed mmcrfileset doesn’t set the mount point either.
>  
> 
> Daniel
> 
> 
>  
> 
>  
>  
> Dr Daniel Kidger 
> IBM Technical Sales Specialist
> Software Defined Solution Sales
> 
> + 44-(0)7818 522 266 
> daniel.kidger at uk.ibm.com
> 
> On 3 Jan 2018, at 10:38, Sobey, Richard A <r.sobey at imperial.ac.uk> wrote:
> 
> Hi all,
>  
> Attempting to change the junction path of a fileset and I’m getting some strange output. It may just not be possible but the documentation on mmchfileset itself doesn’t make it clear.
>  
> mmchfileset gpfs filesetname -J /gpfs/new_path
> mmchfileset: Options -J and FilesetName cannot be specified at the same time.
>  
> Which leads to what’s the point of the following command as the error suggests it will work:
>  
> mmchfileset device -J /gpfs/new_path
>  
> …as not specifying a FilesetName to the input of mmchfileset seems odd.
>  
> I do of course know that I can just unlink and relink but hey.. trying to save a few precious seconds 😊
>  
> Cheers
> Richard
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Unless stated otherwise above:
IBM United Kingdom Limited - Registered in England and Wales with number 741598. 
Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU

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