[gpfsug-discuss] GPFS 4.1.1 without QoS for mmrestripefs?

[Sven Oehme]

Daniel,

as you know, we can't discuss future / confidential items on a mailing
list.
what i presented as an outlook to future releases hasn't changed from a
technical standpoint, we just can't share a release date until we announce
it official.
there are multiple ways today to limit the impact on restripe and other
tasks, the best way to do this is to run the task ( using -N) on a node (or
very small number of nodes) that has no performance critical role. while
this is not perfect, it should limit the impact significantly. .

sven

------------------------------------------
Sven Oehme
Scalable Storage Research
email: oehmes at us.ibm.com
Phone: +1 (408) 824-8904
IBM Almaden Research Lab
------------------------------------------



From:	Daniel Vogel <Daniel.Vogel at abcsystems.ch>
To:	"'gpfsug-discuss at gpfsug.org'" <gpfsug-discuss at gpfsug.org>
Date:	07/01/2015 03:29 AM
Subject:	[gpfsug-discuss] GPFS 4.1.1 without QoS for mmrestripefs?
Sent by:	gpfsug-discuss-bounces at gpfsug.org



Hi

Years ago, IBM made some plan to do a implementation “QoS for mmrestripefs,
mmdeldisk…”. If a “mmfsrestripe” is running, very poor performance for NFS
access.
I opened a PMR to ask for QoS in version 4.1.1 (Spectrum Scale).

PMR 61309,113,848:
I discussed the question of QOS with the development team. These
command changes that were noticed are not meant to be used as GA code
which is why they are not documented. I cannot provide any further
information from the support perspective.


Anybody knows about QoS? The last hope was at “GPFS Workshop Stuttgart März
2015” with Sven Oehme as speaker.

Daniel Vogel
IT Consultant

ABC SYSTEMS AG
Hauptsitz Zürich
Rütistrasse 28
CH - 8952 Schlieren
T +41 43 433 6 433
D +41 43 433 6 467
http://www.abcsystems.ch

ABC - Always Better Concepts. Approved By Customers since 1981.
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