[gpfsug-discuss] setxattr via policy

[Jez Tucker]

Hi Marcus,

   Something like this should do you:

RULE 'setxattr' LIST 'do_setxattr'
FOR FILESET ('xattrfileset')
WEIGHT(DIRECTORY_HASH)
ACTION(SETXATTR('user.testflag1','projectX'))
WHERE
     KB_ALLOCATED >  [insert required file size limit]


Then with one file larger and another file smaller than the limit:

root at elmo:/mmfs1/policies# getfattr -n user.testflag1 
/mmfs1/data/xattrfileset/*
getfattr: Removing leading '/' from absolute path names
# file: mmfs1/data/xattrfileset/file.1
user.testflag1="projectX"

/mmfs1/data/xattrfileset/file.2: user.testflag1: No such attribute


As xattrs are a superb way of automating data operations, for those of 
you with our Python API have a look over the xattr examples in the git 
repo: https://github.com/arcapix/gpfsapi-examples as an alternative 
Pythonic way to achieve this.

Cheers,

Jez



On 22/11/17 03:13, Marcus Koenig wrote:
> Hi there,
>
> I've got a question around setting userdefined extended attributes. I 
> have played around a bit with setting certain attributes via mmchattr 
> - but now I want to run a policy to do this for me for certain 
> filesets or file sizes.
>
> How would I write my policy to set an attribute like 
> user.testflag1=projectX on a number of files in a fileset that are 
> bigger than 1G for example?
>
> Thanks folks.
>
> Cheers,
> Marcus
>
>
> _______________________________________________
> gpfsug-discuss mailing list
> gpfsug-discuss at spectrumscale.org
> http://gpfsug.org/mailman/listinfo/gpfsug-discuss

-- 
*Jez Tucker*
Head of Research and Development, Pixit Media
07764193820 | jtucker at pixitmedia.com <mailto:jtucker at pixitmedia.com>
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