[gpfsug-discuss] Migration policy confusion

[Mark.Bush at siriuscom.com]

Thanks Daniel.  I did wait for 15-20 minutes after.

From: <gpfsug-discuss-bounces at spectrumscale.org> on behalf of Daniel Kidger <daniel.kidger at uk.ibm.com>
Reply-To: gpfsug main discussion list <gpfsug-discuss at spectrumscale.org>
Date: Thursday, July 7, 2016 at 8:10 AM
To: "gpfsug-discuss at spectrumscale.org" <gpfsug-discuss at spectrumscale.org>
Cc: "gpfsug-discuss at spectrumscale.org" <gpfsug-discuss at spectrumscale.org>
Subject: Re: [gpfsug-discuss] Migration policy confusion

Mark,
For performance reasons, mmdf gets its data updated asynchronously.
Did you try waiting a few minutes?
Daniel
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Dr Daniel Kidger
IBM Technical Sales Specialist
Software Defined Solution Sales

+44-07818 522 266
daniel.kidger at uk.ibm.com







----- Original message -----
From: "Mark.Bush at siriuscom.com" <Mark.Bush at siriuscom.com>
Sent by: gpfsug-discuss-bounces at spectrumscale.org
To: gpfsug main discussion list <gpfsug-discuss at spectrumscale.org>
Cc:
Subject: [gpfsug-discuss] Migration policy confusion
Date: Thu, Jul 7, 2016 2:00 PM



Hello all, I’m struggling trying to understand tiering and policies in general in SpecScale.  I have a single filesystem with two pools defined (system, GOLD).  The GOLD pool is made up of some faster disks than the system pool.  The policy I’m trying to get working is as follows



RULE 'go_gold'

    MIGRATE

        FROM POOL 'system'

    TO POOL 'GOLD'

        WHERE (LOWER(NAME) LIKE '%.perf')



I’m simply trying to get the data to move the NDS’s in GOLD pool.



When I do an mmapplypolicy, mmlsattr shows that it’s now in the GOLD pool but when I do a mmdf the data shows 100% free still.  I tried a mmrestripefs as well and no change to the mmdf output.  Am I missing something here?  Is this just normal behavior and the blocks will get moved at some other time?  I guess I was expecting instant gratification and that those files would have been moved to the correct NSD.













Mark R. Bush | Solutions Architect
Mobile: 210.237.8415 | mark.bush at siriuscom.com
Sirius Computer Solutions | www.siriuscom.com<http://www.siriuscom.com>
10100 Reunion Place, Suite 500, San Antonio, TX 78216



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