Thanks Olaf, that's good to know (and is kind of what I suspected). I've requested a number of times this capability for those of us who can't use or aren't using GNR and the answer is effectively "no". This response is curious to me because I'm sure IBM doesn't believe that data integrity is only important and of value to customers who purchase their hardware *and* software.
-Aaron On Fri, Jun 30, 2017 at 1:37 PM, Olaf Weiser <[email protected]> wrote: > yes.. in case of GNR (GPFS native raid) .. we do end-to-end check-summing > ... client --> server --> downToDisk > GNR writes down a chksum to disk (to all pdisks /all "raid" segments ) so > that dropped writes can be detected as well as miss-done writes (bit > flips..) > > > > From: Aaron Knister <[email protected]> > To: gpfsug main discussion list <[email protected]> > Date: 06/30/2017 07:15 PM > Subject: [gpfsug-discuss] Fwd: FLASH: IBM Spectrum Scale (GPFS): > RDMA-enabled network adapter failure on the NSD server may result in file > IO error (2017.06.30) > Sent by: [email protected] > ------------------------------ > > > > I'm curious to know why this doesn't affect GSS/ESS? Is it a feature of > the additional check-summing done on those platforms? > > > -------- Forwarded Message -------- > Subject: FLASH: IBM Spectrum Scale (GPFS): RDMA-enabled > network adapter > failure on the NSD server may result in file IO error (2017.06.30) > Date: Fri, 30 Jun 2017 14:19:02 +0000 > From: IBM My Notifications <[email protected] > > > To: [email protected] > > > > > My Notifications for Storage - 30 Jun 2017 > > Dear Subscriber ([email protected]), > > Here are your updates from IBM My Notifications. > > Your support Notifications display in English by default. Machine > translation based on your IBM profile > language setting is added if you specify this option in My defaults > within My Notifications. > (Note: Not all languages are available at this time, and the English > version always takes precedence > over the machine translated version.) > > ------------------------------------------------------------ > ------------------ > 1. IBM Spectrum Scale > > - TITLE: IBM Spectrum Scale (GPFS): RDMA-enabled network adapter failure > on the NSD server may result in file IO error > - URL: > http://www.ibm.com/support/docview.wss?uid=ssg1S1010233&; > myns=s033&mynp=OCSTXKQY&mynp=OCSWJ00&mync=E&cm_sp=s033-_- > OCSTXKQY-OCSWJ00-_-E > - ABSTRACT: IBM has identified an issue with all IBM GPFS and IBM > Spectrum Scale versions where the NSD server is enabled to use RDMA for > file IO and the storage used in your GPFS cluster accessed via NSD > servers (not fully SAN accessible) includes anything other than IBM > Elastic Storage Server (ESS) or GPFS Storage Server (GSS); under these > conditions, when the RDMA-enabled network adapter fails, the issue may > result in undetected data corruption for file write or read operations. > > ------------------------------------------------------------ > ------------------ > Manage your My Notifications subscriptions, or send questions and comments. > - Subscribe or Unsubscribe - https://www.ibm.com/support/mynotifications > - Feedback - > https://www-01.ibm.com/support/feedback/techFeedbackCardContentMyNotif > ications.html > > - Follow us on Twitter - https://twitter.com/IBMStorageSupt > > > > To ensure proper delivery please add [email protected] to > your address book. > You received this email because you are subscribed to IBM My > Notifications as: > [email protected] > > Please do not reply to this message as it is generated by an automated > service machine. > > (C) International Business Machines Corporation 2017. All rights reserved. > _______________________________________________ > gpfsug-discuss mailing list > gpfsug-discuss at spectrumscale.org > http://gpfsug.org/mailman/listinfo/gpfsug-discuss > > > > > > _______________________________________________ > gpfsug-discuss mailing list > gpfsug-discuss at spectrumscale.org > http://gpfsug.org/mailman/listinfo/gpfsug-discuss > >
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