[gpfsug-discuss] GPFS Encryption
J. Eric Wonderley
eric.wonderley at vt.edu
Mon Mar 26 13:19:11 BST 2018
Hi Gareth:
We have the spectrum archive product with encryption. It encrypts data on
disk and tape...but not metadata. We originally had hoped to write small
files with metadata...that does not happen with encryption.
My guess is that the system pool(where metadata lives) cannot be encrypted.
So you may pay a performance penalty for small files using encryption
depending on what backends your data write policy.
Eric
On Mon, Mar 26, 2018 at 7:25 AM, Gareth Horton <G.Horton at bham.ac.uk> wrote:
> Hi. All,
>
> I would be interested to hear if any members have experience implementing
> Encryption?, any gotchas, tips or any other information which may help with
> the preparation and implementation stages would be appreciated.
>
> I am currently reading through the documentation and reviewing the
> preparation steps, and with a scheduled maintenance window on the horizon
> it would be a good opportunity to carry out any preparatory steps requiring
> an outage.
>
> If there are any aspects of the configuration which in hindsight could
> have been done at the preparation stage this would be especially useful.
>
> Many Thanks
>
> Gareth
>
> ----------------------
>
> On 24/03/2018, 12:00, "gpfsug-discuss-bounces at spectrumscale.org on behalf
> of gpfsug-discuss-request at spectrumscale.org" <gpfsug-discuss-bounces@
> spectrumscale.org on behalf of gpfsug-discuss-request at spectrumscale.org>
> wrote:
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> Today's Topics:
>
> 1. Reminder - SSUG-US Spring meeting - Call for Speakers and
> Registration (Oesterlin, Robert)
> 2. Pool layoutMap option changes following GPFS upgrades
> (Caron, Paul)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Fri, 23 Mar 2018 12:59:51 +0000
> From: "Oesterlin, Robert" <Robert.Oesterlin at nuance.com>
> To: gpfsug main discussion list <gpfsug-discuss at spectrumscale.org>
> Subject: [gpfsug-discuss] Reminder - SSUG-US Spring meeting - Call for
> Speakers and Registration
> Message-ID: <28FF6725-9698-4F68-BC4E-BBCD6164BB3D at nuance.com>
> Content-Type: text/plain; charset="utf-8"
>
> Reminder: The registration for the Spring meeting of the SSUG-USA is
> now open. This is a Free two-day and will include a large number of
> Spectrum Scale updates and breakout tracks.
>
> Please note that we have limited meeting space so please register
> early if you plan on attending. If you are interested in presenting, please
> contact me. We do have a few more slots for user presentations ? these do
> not need to be long.
>
> You can register here:
>
> https://www.eventbrite.com/e/spectrum-scale-gpfs-user-
> group-us-spring-2018-meeting-tickets-43662759489
>
> DATE AND TIME
> Wed, May 16, 2018, 9:00 AM ?
> Thu, May 17, 2018, 5:00 PM EDT
>
> LOCATION
> IBM Cambridge Innovation Center
> One Rogers Street
> Cambridge, MA 02142-1203
>
>
> Bob Oesterlin
> Sr Principal Storage Engineer, Nuance
>
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> Message: 2
> Date: Fri, 23 Mar 2018 20:10:05 +0000
> From: "Caron, Paul" <Paul.Caron at sig.com>
> To: "gpfsug-discuss at spectrumscale.org"
> <gpfsug-discuss at spectrumscale.org>
> Subject: [gpfsug-discuss] Pool layoutMap option changes following GPFS
> upgrades
> Message-ID: <980f9a27290342e28197154b924d0abf at msx.bala.susq.com>
> Content-Type: text/plain; charset="us-ascii"
>
> Hi,
>
> Has anyone run into a situation where the layoutMap option for a pool
> changes from "scatter" to "cluster" following a GPFS software upgrade? We
> recently upgraded a file system from 3.5.0.21, to 4.1.1.17, and finally to
> 4.2.3.6. We noticed that the layoutMap option for two of our pools changed
> following the upgrades. We didn't recreate the file system or any of the
> pools. Further lab testing has revealed that the layoutMap option change
> actually occurred during the first upgrade to 4.1.1.17, and it was simply
> carried forward to 4.2.3.6. We have a PMR open with IBM on this problem,
> but they have told us that layoutMap option changes are impossible for
> existing pools, and that a software upgrade couldn't do this. I sent the
> results of my lab testing today, so I'm hoping to get a better response.
>
> We would rather not have to recreate all the pools, but it is starting
> to look like that may be the only option to fix this. Also, it's unclear
> if this could happen again during future upgrades.
>
> Here's some additional background.
>
> * The "-j" option for the file system is "cluster"
>
> * We have a pretty small cluster; just 13 nodes
>
> * When reproducing the problem, we noted that the layoutMap
> option didn't change until the final node was upgraded
>
> * The layoutMap option changed before running the "mmchconfig
> release=LATEST" and "mmchfs <fs> -V full" commands, so those don't seem to
> be related to the problem
>
> Thanks,
>
> Paul C.
> SIG
>
>
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