[gpfsug-discuss] Unbalanced pdisk free space

[Dorigo Alvise (PSI)]

They're attached.

Thanks!

   Alvise

________________________________
From: gpfsug-discuss-bounces at spectrumscale.org [gpfsug-discuss-bounces at spectrumscale.org] on behalf of IBM Spectrum Scale [scale at us.ibm.com]
Sent: Wednesday, January 30, 2019 9:25 PM
To: gpfsug main discussion list
Subject: Re: [gpfsug-discuss] Unbalanced pdisk free space

Alvise,

Could you send us the output of the following commands from both server nodes.

  *   mmfsadm dump nspdclient > /tmp/dump_nspdclient.<nodeName>
  *   mmfsadm dump pdisk   > /tmp/dump_pdisk.<nodeName>
  *

Regards, The Spectrum Scale (GPFS) team

------------------------------------------------------------------------------------------------------------------
If you feel that your question can benefit other users of  Spectrum Scale (GPFS), then please post it to the public IBM developerWroks Forum at https://www.ibm.com/developerworks/community/forums/html/forum?id=11111111-0000-0000-0000-000000000479.

If your query concerns a potential software error in Spectrum Scale (GPFS) and you have an IBM software maintenance contract please contact  1-800-237-5511 in the United States or your local IBM Service Center in other countries.

The forum is informally monitored as time permits and should not be used for priority messages to the Spectrum Scale (GPFS) team.



From:        "Dorigo Alvise (PSI)" <alvise.dorigo at psi.ch>
To:        "gpfsug-discuss at spectrumscale.org" <gpfsug-discuss at spectrumscale.org>
Date:        01/30/2019 08:24 AM
Subject:        [gpfsug-discuss] Unbalanced pdisk free space
Sent by:        gpfsug-discuss-bounces at spectrumscale.org
________________________________



Hello,
I've a Lenovo Spectrum Scale system DSS-G220 (software dss-g-2.0a) composed of
2x x3560 M5 IO server nodes
1x x3550 M5 client/support node
2x disk enclosures D3284
GPFS/GNR 4.2.3-7

Can anybody tell me if it is normal that all the pdisks of both my recovery groups, residing on the same physical enclosure have free space equal to (more or less) 1/3 of the free space of the pdisks residing on the other physical enclosure (see attached text files for the command line output) ?

I guess when the least free disks are fully occupied (while the others are still partially free) write performance will drop by a factor of two. Correct ?
Is there a way (considering that the system is in production) to fix (rebalance) this free space among all pdisk of both enclosures ?

Should I open a PMR to IBM ?

Many thanks,

   Alvise

[attachment "rg1" deleted by Brian Herr/Poughkeepsie/IBM] [attachment "rg2" deleted by Brian Herr/Poughkeepsie/IBM] _______________________________________________
gpfsug-discuss mailing list
gpfsug-discuss at spectrumscale.org
http://gpfsug.org/mailman/listinfo/gpfsug-discuss



-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://gpfsug.org/pipermail/gpfsug-discuss_gpfsug.org/attachments/20190131/2018fa6a/attachment.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: dump_nspdclient.sf-dssio-1
Type: application/octet-stream
Size: 570473 bytes
Desc: dump_nspdclient.sf-dssio-1
URL: <http://gpfsug.org/pipermail/gpfsug-discuss_gpfsug.org/attachments/20190131/2018fa6a/attachment.obj>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: dump_nspdclient.sf-dssio-2
Type: application/octet-stream
Size: 566924 bytes
Desc: dump_nspdclient.sf-dssio-2
URL: <http://gpfsug.org/pipermail/gpfsug-discuss_gpfsug.org/attachments/20190131/2018fa6a/attachment-0001.obj>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: dump_pdisk.sf-dssio-1
Type: application/octet-stream
Size: 682312 bytes
Desc: dump_pdisk.sf-dssio-1
URL: <http://gpfsug.org/pipermail/gpfsug-discuss_gpfsug.org/attachments/20190131/2018fa6a/attachment-0002.obj>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: dump_pdisk.sf-dssio-2
Type: application/octet-stream
Size: 619497 bytes
Desc: dump_pdisk.sf-dssio-2
URL: <http://gpfsug.org/pipermail/gpfsug-discuss_gpfsug.org/attachments/20190131/2018fa6a/attachment-0003.obj>