[lustre-discuss] Large-scale UID/GID changes via lfs

Scott Nolin scott.nolin at ssec.wisc.edu
Thu Oct 15 08:47:01 PDT 2015

We use robinhood policy engine to do this for GIDs to provide a fake 
group quota sort of thing.

If you have to do this routinely, look into robinhood.


On 10/14/2015 9:52 PM, Ms. Megan Larko wrote:
> Hello,
> I have been able to successfully use "lfs lsetfacl ....." to set and
> modify permissions on a Lustre file system quickly with a small system
> because the lfs is directed at the Lustre MDT.  It is similar, I
> imagine, to using "lfs find..." to search a Lustre fs compared with a
> *nix "find..." command,  the latter which must touch every stripe
> located on any OST.
> So, how do a change UID and/or GID over a Lustre file system?  Doing a
> *nix find and chown seems to have the same detrimental performance.
>  >lfs lgetfact my.file
> The above returns the file ACL info.  I can change permissions and add a
> group or user access/perm but I don't know how to change the "header"
> information. (To see the difference in header information, one could try
> "lfs lgetfact --no-head my.file" which shows the ACL info without the
> header.)
>  >lfs lsetfacl -muser:newPerson:rwx my.file
> The above adds user with those perms to the original user listed in the
> header info.
> This is using Lustre version 2.6.x (forgot minor number). on RHEL 6.5.
> Suggestions genuinely appreciated.
> Cheers,
> megan
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> lustre-discuss mailing list
> lustre-discuss at lists.lustre.org
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