<span style=" font-size:12pt;font-family:Arial">I think it would be wise
to first set the failure group on the existing NSDs to a valid value and
not use -1. I would also suggest you not use consecutive numbers
like 1 and 2 but something with some distance between them, for example
10 and 20, or 100 and 200.</span><br><br><span style=" font-size:10pt;font-family:sans-serif">Regards, The Spectrum
Scale (GPFS) team<br><br>------------------------------------------------------------------------------------------------------------------<br>If you feel that your question can benefit other users of Spectrum
Scale (GPFS), then please post it to the public IBM developerWroks Forum
at </span><a href="https://www.ibm.com/developerworks/community/forums/html/forum?id=11111111-0000-0000-0000-000000000479"><span style=" font-size:10pt;font-family:sans-serif">https://www.ibm.com/developerworks/community/forums/html/forum?id=11111111-0000-0000-0000-000000000479</span></a><span style=" font-size:10pt;font-family:sans-serif">.
<br><br>If your query concerns a potential software error in Spectrum Scale (GPFS)
and you have an IBM software maintenance contract please contact 1-800-237-5511
in the United States or your local IBM Service Center in other countries.
<br><br>The forum is informally monitored as time permits and should not be used
for priority messages to the Spectrum Scale (GPFS) team.</span><br><br><br><br><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif">From:
</span><span style=" font-size:9pt;font-family:sans-serif">Stephen
Ulmer <ulmer@ulmer.org></span><br><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif">To:
</span><span style=" font-size:9pt;font-family:sans-serif">gpfsug
main discussion list <gpfsug-discuss@spectrumscale.org></span><br><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif">Cc:
</span><span style=" font-size:9pt;font-family:sans-serif">"gpfsug-discuss-request@spectrumscale.org"
<gpfsug-discuss-request@spectrumscale.org></span><br><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif">Date:
</span><span style=" font-size:9pt;font-family:sans-serif">04/16/2019
09:18 AM</span><br><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif">Subject:
</span><span style=" font-size:9pt;font-family:sans-serif">Re:
[gpfsug-discuss] Spectrum Scale Replication across failure
groups</span><br><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif">Sent
by: </span><span style=" font-size:9pt;font-family:sans-serif">gpfsug-discuss-bounces@spectrumscale.org</span><br><hr noshade><br><br><br><span style=" font-size:12pt">I believe that -1 is "special",
in that all -1’s are different form each other. So you will wind up with
data on several -1 NSDs, instead of a -1 and a 2.</span><br><br><span style=" font-size:12pt">In fact you probably didn’t specify
-1, it was likely assigned automatically.</span><br><br><span style=" font-size:12pt">Read the first paragraph in the failureGroup
entry in:</span><br><br><a href="https://www.ibm.com/support/knowledgecenter/en/STXKQY_5.0.2/com.ibm.spectrum.scale.v5r02.doc/bl1adm_mmcrnsd.htm"><span style=" font-size:12pt;color:blue"><u>https://www.ibm.com/support/knowledgecenter/en/STXKQY_5.0.2/com.ibm.spectrum.scale.v5r02.doc/bl1adm_mmcrnsd.htm</u></span></a><br><br><span style=" font-size:12pt">I do realize that the subsequent paragraphs
do confuse the issue somewhat, but the first paragraph describes what’s
happening.</span><br><br><span style=" font-size:12pt">Liberty,</span><br><br><span style=" font-size:12pt">-- <br>Stephen<br><br></span><br><br><span style=" font-size:12pt">On Apr 16, 2019, at 8:38 AM, Prasad Surampudi
<</span><a href="mailto:prasad.surampudi@theatsgroup.com"><span style=" font-size:12pt;color:blue"><u>prasad.surampudi@theatsgroup.com</u></span></a><span style=" font-size:12pt">>
wrote:</span><br><br><span style=" font-size:12pt;font-family:Arial">We have a filesystem
with 'system' and 'v7kdata' pools. All the NSDs in v7kdata are with failure
group '-1'. Filesystem metadata is already replicated. Now we are planning
to replicate the filesystem data. So, If I add new NSDs with failure group
'2' in the v7kdata pool, would I be able to replicate GPFS
data between NSDs with '-1' failure group and NSDs with failure group '2'
? i.e have one copy of file on NSD with '-1' and another copy on NSD with
failure group '2' ? or Do I have to change the NSDs with failure group
'-1' to '1' ?</span><br><span style=" font-size:12pt;font-family:Arial"> </span><br><br><span style=" font-size:9pt;color:#2f2f2f;font-family:Tahoma">mobile
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