[Lustre-discuss] rc -43: Identifier removed

[Kit Westneat]

What the group upcall does is get all the secondary groups for the 
client user. There isn't enough room in the LNET message to send them 
all, so the MDS has to look it up in the /etc/groups. If you don't care 
about secondary groups at all, there is no harm in clearing the 
group_upcall param.

In theory, there also shouldn't be any harm in having different passwd 
and group files on the MDS and OSSes than on the clients. It's highly 
important, however, that all the clients have the same passwd and groups 
files. Otherwise the clients could interpret the same UID as different 
users, and people could go mucking around in each others files.

- Kit

Per Lundqvist wrote:
> On Mon, 11 Feb 2008, Aaron Knister wrote:
>
>   
>> I had the same issue with my lustre setup. I think this should fix it --
>>
>> tunefs.lustre --param mdt.group_upcall=NONE /dev/mdt/device
>>     
>
> Thanks Andreas and Aaron, but then I wonder why the MDS needs to have all 
> the users in its own passwd/group file? And what are the implications of 
> setting the above mdt.group_upcall=NONE on the MDT?
>
> /Per
>
>   
> ------------------------------------------------------------------------
>
> _______________________________________________
> Lustre-discuss mailing list
> Lustre-discuss at lists.lustre.org
> http://lists.lustre.org/mailman/listinfo/lustre-discuss
>