[gpfsug-discuss] Samba (rid) -> CES (autorid) migration

[Varun Mittal3]

Hi Christian

Is the data on existing cluster being accesses only through SMB or is it
shared with NFS users having same UID/GIDs ?
What mechanism would you be using to migrate the data ?

I mean, if it's pure smb and the data migration would also be over smb
share only (using tool like robocopy), you need not have the same IDs on
both the source and the target system.


Best regards,
Varun Mittal
Cloud/Object Scrum @ Spectrum Scale
ETZ, Pune



From:	"Fey, Christian" <Christian.Fey at sva.de>
To:	gpfsug main discussion list <gpfsug-discuss at spectrumscale.org>
Date:	11/05/2017 09:07 PM
Subject:	[gpfsug-discuss] Samba (rid) -> CES (autorid) migration
Sent by:	gpfsug-discuss-bounces at spectrumscale.org



Hi all,

I'm just doing a migration from a gpfs cluster with samba/ctdb to CES
protocol nodes. The old ctdb cluster uses rid as idmap backend. Since CES
officially supports only autorid, I tried to choose the right values for
the idmap ranges / sizes to get the same IDs but was not successful with
this.

The old samba has a range assigned for their Active directory (idmap config
XYZ : range = 1000000-1999999)

My idea was to set autorid to the following during mmuserauth create:

idmap config * : backend = autorid
idmap config * : range = 200000-2999999
idmap config * : rangesize = 800000

With that it should use the first range for the builtin range and the
second should then start with 1000000 like in the old rid config.

Sadly, the range of the domain is the third one:

/usr/lpp/mmfs/bin/net idmap get ranges
RANGE 0: ALLOC
RANGE 1: S-1-5-32
RANGE 2: S-1-5-21-123456789-123456789-123456789

Does anyone have an idea how to fix this, maybe in a supported way and
without storing the IDs in the domain?

Further on, does anyone use rid as backend, even if not officially
supported? Maybe we could file a RPQ or sth. Like this.


Mit freundlichen Grüßen / Best Regards

Christian Fey


SVA System Vertrieb Alexander GmbH
Borsigstraße 14
65205 Wiesbaden

Tel.: +49 6122 536-0
Fax: +49 6122 536-399
E-Mail: christian.fey at sva.de
http://www.sva.de


Geschäftsführung: Philipp Alexander, Sven Eichelbaum
Sitz der Gesellschaft: Wiesbaden
Registergericht: Amtsgericht Wiesbaden, HRB 10315
 [attachment "smime.p7s" deleted by Varun Mittal3/India/IBM]
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