[gpfsug-discuss] gpfsug-discuss Digest, Vol 57, Issue 66

Sanjay Gandhi gsanjay at us.ibm.com
Tue Oct 25 20:48:58 BST 2016


VMDK is not supported due to  http://kb.vmware.com/kb/2032940

It can cause GPFS  deadlock due to hung IO.


Thanks,
Sanjay Gandhi
GPFS FVT
IBM, Beaverton
Phone/FAX : 503-578-4141 T/L 775-4141
gsanjay at us.ibm.com



From:	gpfsug-discuss-request at spectrumscale.org
To:	gpfsug-discuss at spectrumscale.org
Date:	10/25/2016 12:35 PM
Subject:	gpfsug-discuss Digest, Vol 57, Issue 66
Sent by:	gpfsug-discuss-bounces at spectrumscale.org



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Today's Topics:

   1. Re: Virtualized Spectrum Scale (Mark.Bush at siriuscom.com)


----------------------------------------------------------------------

Message: 1
Date: Tue, 25 Oct 2016 19:34:29 +0000
From: "Mark.Bush at siriuscom.com" <Mark.Bush at siriuscom.com>
To: gpfsug main discussion list <gpfsug-discuss at spectrumscale.org>
Subject: Re: [gpfsug-discuss] Virtualized Spectrum Scale
Message-ID: <5482A551-873C-4F9F-89BF-0CF0FB926D92 at siriuscom.com>
Content-Type: text/plain; charset="utf-8"

This is interesting since the SS FAQ leads me to believe that I have some
options here.  Does GPFS nodes with no direct disk access still mean RDMs?

[cid:image001.png at 01D22ECC.E20EC2F0]

From: <gpfsug-discuss-bounces at spectrumscale.org> on behalf of Luis
Bolinches <luis.bolinches at fi.ibm.com>
Reply-To: gpfsug main discussion list <gpfsug-discuss at spectrumscale.org>
Date: Tuesday, October 25, 2016 at 1:58 PM
To: gpfsug main discussion list <gpfsug-discuss at spectrumscale.org>
Subject: Re: [gpfsug-discuss] Virtualized Spectrum Scale

Hi

You must use RDM. Otherwise is not supported. SCSI commands is the reason.

Furthermore on some versions I managed to crash the ESXi as well.

--
Cheers

On 25 Oct 2016, at 19.46, "Mark.Bush at siriuscom.com<
mailto:Mark.Bush at siriuscom.com>" <Mark.Bush at siriuscom.com<
mailto:Mark.Bush at siriuscom.com>> wrote:
Anyone running SpectrumScale on Virtual Machines (intel)?  I?m curious how
you manage disks?  Do you use RDM?s?  Does this even make sense to do?  If
you have a 2-3 node cluster how do you share the disks across?  Do you have
VM?s with their own VMDK?s (if not RDM) in each node or is there some way
to share access to the same VMDK?s?  What are the advantages doing this
other than existing HW use?  Seems to me for a lab environment or very
small nonperformance focused implementation this may be a viable option.

Thanks

Mark

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