[gpfsug-discuss] V5 Experience -- maxblocksize

Grunenberg, Renar Renar.Grunenberg at huk-coburg.de
Fri Feb 9 15:12:13 GMT 2018


Hallo Sven,
thanks, it‘s clear now. You have work now ;-)
Happy Weekend from Coburg.


Renar Grunenberg
Abteilung Informatik – Betrieb

HUK-COBURG
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96444 Coburg
Telefon:        09561 96-44110
Telefax:        09561 96-44104
E-Mail: Renar.Grunenberg at huk-coburg.de
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Von: gpfsug-discuss-bounces at spectrumscale.org [mailto:gpfsug-discuss-bounces at spectrumscale.org] Im Auftrag von Sven Oehme
Gesendet: Freitag, 9. Februar 2018 16:09
An: gpfsug main discussion list <gpfsug-discuss at spectrumscale.org>
Betreff: Re: [gpfsug-discuss] V5 Experience -- maxblocksize

you can only create a filesystem with a blocksize of what ever current maxblocksize is set. let me discuss with felipe what//if we can share here to solve this.

sven

On Fri, Feb 9, 2018 at 6:59 AM Grunenberg, Renar <Renar.Grunenberg at huk-coburg.de<mailto:Renar.Grunenberg at huk-coburg.de>> wrote:
Hallo Sven,
that stated a mmcrfs ‘newfs’ -B 4M is possible if the maxblocksize is 1M (from the upgrade) without the requirement to change this parameter before?? Correct or not?
Regards




Renar Grunenberg
Abteilung Informatik – Betrieb

HUK-COBURG
Bahnhofsplatz
96444 Coburg
Telefon:

09561 96-44110

Telefax:

09561 96-44104

E-Mail:

Renar.Grunenberg at huk-coburg.de<mailto:Renar.Grunenberg at huk-coburg.de>

Internet:

www.huk.de<http://www.huk.de>

HUK-COBURG Haftpflicht-Unterstützungs-Kasse kraftfahrender Beamter Deutschlands a. G. in Coburg
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Vorsitzender des Aufsichtsrats: Prof. Dr. Heinrich R. Schradin.
Vorstand: Klaus-Jürgen Heitmann (Sprecher), Stefan Gronbach, Dr. Hans Olav Herøy, Dr. Jörg Rheinländer (stv.), Sarah Rössler, Daniel Thomas (stv.).
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Von: gpfsug-discuss-bounces at spectrumscale.org<mailto:gpfsug-discuss-bounces at spectrumscale.org> [mailto:gpfsug-discuss-bounces at spectrumscale.org<mailto:gpfsug-discuss-bounces at spectrumscale.org>] Im Auftrag von Sven Oehme
Gesendet: Freitag, 9. Februar 2018 15:48

An: gpfsug main discussion list <gpfsug-discuss at spectrumscale.org<mailto:gpfsug-discuss at spectrumscale.org>>
Betreff: Re: [gpfsug-discuss] V5 Experience -- maxblocksize

Renar,

if you specify the filesystem blocksize of 1M during mmcr you don't have to restart anything. scale 5 didn't change anything on the behaviour of maxblocksize change while the cluster is online, it only changed the default passed to the blocksize parameter for create a new filesystem. one thing we might consider doing is changing the command to use the current active  maxblocksize as input for mmcrfs if maxblocksize is below current default.

Sven


On Fri, Feb 9, 2018 at 6:30 AM Grunenberg, Renar <Renar.Grunenberg at huk-coburg.de<mailto:Renar.Grunenberg at huk-coburg.de>> wrote:
Felipe, all,
first thanks for clarification, but what was the reason for this logic? If i upgrade to Version 5 and want to create new filesystems, and the maxblocksize is on 1M, we must shutdown the hole cluster to change this to the defaults to use the new one default. I had no understanding for that decision. We are at 7 x 24h availability with our cluster today, we had no real maintenance window here! Any circumvention are welcome.

Regards Renar


Renar Grunenberg
Abteilung Informatik – Betrieb


HUK-COBURG
Bahnhofsplatz
96444 Coburg
Telefon:

09561 96-44110

Telefax:

09561 96-44104

E-Mail:

Renar.Grunenberg at huk-coburg.de<mailto:Renar.Grunenberg at huk-coburg.de>

Internet:

www.huk.de<http://www.huk.de>

HUK-COBURG Haftpflicht-Unterstützungs-Kasse kraftfahrender Beamter Deutschlands a. G. in Coburg
Reg.-Gericht Coburg HRB 100; St.-Nr. 9212/101/00021
Sitz der Gesellschaft: Bahnhofsplatz, 96444 Coburg
Vorsitzender des Aufsichtsrats: Prof. Dr. Heinrich R. Schradin.
Vorstand: Klaus-Jürgen Heitmann (Sprecher), Stefan Gronbach, Dr. Hans Olav Herøy, Dr. Jörg Rheinländer (stv.), Sarah Rössler, Daniel Thomas (stv.).
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Von: gpfsug-discuss-bounces at spectrumscale.org<mailto:gpfsug-discuss-bounces at spectrumscale.org> [mailto:gpfsug-discuss-bounces at spectrumscale.org<mailto:gpfsug-discuss-bounces at spectrumscale.org>] Im Auftrag von Felipe Knop
Gesendet: Freitag, 9. Februar 2018 14:59
An: gpfsug main discussion list <gpfsug-discuss at spectrumscale.org<mailto:gpfsug-discuss at spectrumscale.org>>
Betreff: Re: [gpfsug-discuss] V5 Experience -- maxblocksize


All,

Correct. There is no need to change the value of 'maxblocksize' for existing clusters which are upgraded to the 5.0.0 level. If a new file system needs to be created with a block size which exceeds the value of maxblocksize then the mmchconfig needs to be issued to increase the value of maxblocksize (which requires the entire cluster to be stopped).

For clusters newly created with 5.0.0, the value of maxblocksize is set to 4MB. See the references to maxblocksize in the mmchconfig and mmcrfs man pages in 5.0.0 .

Felipe

----
Felipe Knop knop at us.ibm.com<mailto:knop at us.ibm.com>
GPFS Development and Security
IBM Systems
IBM Building 008
2455 South Rd, Poughkeepsie, NY 12601
(845) 433-9314<tel:(845)%20433-9314> T/L 293-9314



"Uwe Falke" ---02/09/2018 06:54:10 AM---I suppose the new maxBlockSize default is <>1MB, so your config parameter was properly translated.

From: "Uwe Falke" <UWEFALKE at de.ibm.com<mailto:UWEFALKE at de.ibm.com>>
To: gpfsug main discussion list <gpfsug-discuss at spectrumscale.org<mailto:gpfsug-discuss at spectrumscale.org>>
Date: 02/09/2018 06:54 AM
Subject: Re: [gpfsug-discuss] V5 Experience
Sent by: gpfsug-discuss-bounces at spectrumscale.org<mailto:gpfsug-discuss-bounces at spectrumscale.org>

________________________________



I suppose the new maxBlockSize default is <>1MB, so your config parameter
was properly translated. I'd see no need to change anything.



Mit freundlichen Grüßen / Kind regards


Dr. Uwe Falke

IT Specialist
High Performance Computing Services / Integrated Technology Services /
Data Center Services
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From:   "Grunenberg, Renar" <Renar.Grunenberg at huk-coburg.de<mailto:Renar.Grunenberg at huk-coburg.de>>
To:     "'gpfsug-discuss at spectrumscale.org<mailto:gpfsug-discuss at spectrumscale.org>'"
<gpfsug-discuss at spectrumscale.org<mailto:gpfsug-discuss at spectrumscale.org>>
Date:   02/09/2018 10:16 AM
Subject:        [gpfsug-discuss] V5 Experience
Sent by:        gpfsug-discuss-bounces at spectrumscale.org<mailto:gpfsug-discuss-bounces at spectrumscale.org>



Hallo All,
we updated our Test-Cluster from 4.2.3.6 to V5.0.0.1. So good so fine, but
I see after the mmchconfig release=LATEST a new common parameter
?maxblocksize 1M?
(our fs are on these blocksizes) is happening.
Ok, but if I will change this parameter the hole cluster was requestet
that:

 root @sbdl7003(rhel7.4)> mmchconfig maxblocksize=DEFAULT
Verifying GPFS is stopped on all nodes ...
mmchconfig: GPFS is still active on SAPL7012x1.t7.lan.tuhuk.de<http://SAPL7012x1.t7.lan.tuhuk.de>
mmchconfig: GPFS is still active on SBDL7001x1.t7.lan.tuhuk.de<http://SBDL7001x1.t7.lan.tuhuk.de>
mmchconfig: GPFS is still active on SAPL7013x1.t7.lan.tuhuk.de<http://SAPL7013x1.t7.lan.tuhuk.de>
mmchconfig: GPFS is still active on SAPL7009x1.t7.lan.tuhuk.de<http://SAPL7009x1.t7.lan.tuhuk.de>
mmchconfig: GPFS is still active on SAPL7008x1.t7.lan.tuhuk.de<http://SAPL7008x1.t7.lan.tuhuk.de>
mmchconfig: GPFS is still active on SBDL7003x1.t7.lan.tuhuk.de<http://SBDL7003x1.t7.lan.tuhuk.de>
mmchconfig: GPFS is still active on SBDL7004x1.t7.lan.tuhuk.de<http://SBDL7004x1.t7.lan.tuhuk.de>
mmchconfig: GPFS is still active on SAPL7001x1.t7.lan.tuhuk.de<http://SAPL7001x1.t7.lan.tuhuk.de>
mmchconfig: Command failed. Examine previous error messages to determine
cause.
Can someone explain the behavior here, and same clarification in an update
plan what can we do to go to the defaults without clusterdown.
Is this a bug or a feature;-)

Regards Renar
Renar Grunenberg
Abteilung Informatik ? Betrieb

HUK-COBURG
Bahnhofsplatz
96444 Coburg
Telefon:
09561 96-44110
Telefax:
09561 96-44104
E-Mail:
Renar.Grunenberg at huk-coburg.de<mailto:Renar.Grunenberg at huk-coburg.de>
Internet:
www.huk.de<http://www.huk.de>
HUK-COBURG Haftpflicht-Unterstützungs-Kasse kraftfahrender Beamter
Deutschlands a. G. in Coburg
Reg.-Gericht Coburg HRB 100; St.-Nr. 9212/101/00021
Sitz der Gesellschaft: Bahnhofsplatz, 96444 Coburg
Vorsitzender des Aufsichtsrats: Prof. Dr. Heinrich R. Schradin.
Vorstand: Klaus-Jürgen Heitmann (Sprecher), Stefan Gronbach, Dr. Hans Olav
Herøy, Dr. Jörg Rheinländer (stv.), Sarah Rössler, Daniel Thomas (stv.).
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