Re: [gpfsug-discuss] Converting a dependent fileset to independent

Wed, 25 Apr 2018 02:42:39 -0700

It would though be a nice to have feature: to leave the file data where it was and just move the metadata into its own inode space?
 
A related question though:
In what case do people create new *dependant* filesets ? I can't see many cases where an independent fileset would be just as valid.
Daniel

 
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----- Original message -----
From: "Sobey, Richard A" <[email protected]>
Sent by: [email protected]
To: gpfsug main discussion list <[email protected]>
Cc:
Subject: Re: [gpfsug-discuss] Converting a dependent fileset to independent
Date: Wed, Apr 25, 2018 10:01 AM
 

Hi Marc

 

Yes, copying the data to a freshly created fileset and unlinking/renaming/relinking is our solution; it was always a long shot expecting to be able to convert it ๐Ÿ˜Š

 

Richard

 

From: [email protected] <[email protected]> On Behalf Of Marc A Kaplan
Sent: 24 April 2018 13:49
To: gpfsug main discussion list <[email protected]>
Subject: Re: [gpfsug-discuss] Converting a dependent fileset to independent

 

To help make sense of this, one has to understand that "independent" means a different range of inode numbers.

If you have a set of files within one range of inode numbers, say 3000-5000 and now you want to move some of them to a new range of inode numbers, say 7000-8000, you're going to have to create that new range as a new independent fileset, and then move (copy!) the files to the new fileset.  And then rename directories so that you can once again refer to the files by the pathnames that they "used to" have.

During the copying and renaming, you would have to make sure there are no applications trying to access those files and directories.



From:        "Sobey, Richard A" <[email protected]>
To:        "'[email protected]'" <[email protected]>
Date:        04/24/2018 05:20 AM
Subject:        [gpfsug-discuss] Converting a dependent fileset to independent
Sent by:        [email protected]




Hi all,
 
Is there any way, without starting over, to convert a dependent fileset to independent?
 
My gut says no but in the spirit of not making unnecessary work I wanted to ask.
 
Also, the documentation states that I should see a โ€œdpndโ€ next to a dependent fileset when I run mmlsfileset with -L; this is not the case even though the parent fileset is root in this case.
 
[root@nsd bin]# mmlsfileset gpfs studentrecruitmentandoutreach -L
Filesets in file system 'gpfs':
Name                            Id      RootInode  ParentId Created                      InodeSpace      MaxInodes    AllocInodes Comment
studentrecruitmentandoutreach  241        8700824         0 Wed Feb 14 14:25:49 2018        0                    0              0
 
Thanks
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