<font size=2 face="sans-serif">Does the mirrored-storage vendor guarantee
the sequence of all writes to all the LUNs at the remote-site exactly matches
the sequence of writes to the local site....? If not.. the file
system on the remote-site could be left in an inconsistent state when the
communications line is cut... <br></font><br><font size=2 face="sans-serif">Guaranteeing sequencing to each LUN
is not sufficient, because a typical GPFS file system has its data
and metadata spread over several LUNs.<br></font><br><br><br><font size=1 color=#5f5f5f face="sans-serif">From:
</font><font size=1 face="sans-serif">"Olaf Weiser"
<olaf.weiser@de.ibm.com></font><br><font size=1 color=#5f5f5f face="sans-serif">To:
</font><font size=1 face="sans-serif">gpfsug main discussion
list <gpfsug-discuss@spectrumscale.org></font><br><font size=1 color=#5f5f5f face="sans-serif">Date:
</font><font size=1 face="sans-serif">03/14/2018 07:19 PM</font><br><font size=1 color=#5f5f5f face="sans-serif">Subject:
</font><font size=1 face="sans-serif">Re: [gpfsug-discuss]
Underlying LUN mirroring NSD impact</font><br><font size=1 color=#5f5f5f face="sans-serif">Sent by:
</font><font size=1 face="sans-serif">gpfsug-discuss-bounces@spectrumscale.org</font><br><hr noshade><br><br><br><font size=2 face="sans-serif">HI Mark.. yes.. that's possible...
at least , I'm sure.. there was a chapter in the former advanced
admin guide of older releases with PPRC .. how to do that.. <br>similar to PPRC , you might use other methods , but from gpfs perspective
this should'nt make a difference.. </font><font size=3><br></font><font size=2 face="sans-serif"><br>and I had have a german customer, who was doing this for years... (but
it is some years back meanwhile ... hihi time flies...) </font><font size=3><br><br><br><br><br></font><font size=1 color=#5f5f5f face="sans-serif"><br>From: </font><font size=1 face="sans-serif">Mark
Bush <Mark.Bush@siriuscom.com></font><font size=1 color=#5f5f5f face="sans-serif"><br>To: </font><font size=1 face="sans-serif">"gpfsug-discuss@spectrumscale.org"
<gpfsug-discuss@spectrumscale.org></font><font size=1 color=#5f5f5f face="sans-serif"><br>Date: </font><font size=1 face="sans-serif">03/14/2018
09:11 PM</font><font size=1 color=#5f5f5f face="sans-serif"><br>Subject: </font><font size=1 face="sans-serif">[gpfsug-discuss]
Underlying LUN mirroring NSD impact</font><font size=1 color=#5f5f5f face="sans-serif"><br>Sent by: </font><font size=1 face="sans-serif">gpfsug-discuss-bounces@spectrumscale.org</font><font size=3><br></font><hr noshade><font size=3><br><br></font><font size=2 face="Calibri"><br>Is it possible (albeit not advisable) to mirror LUNs that are NSD\u2019s to
another storage array in another site basically for DR purposes? Once
it\u2019s mirrored to a new cluster elsewhere what would be the step to get
the filesystem back up and running. I know that AFM-DR is meant for
this but in this case my client only has Standard edition and has mirroring
software purchased with the underlying disk array.<br> <br>Is this even doable? <br> <br> <br>Mark<br> </font><tt><font size=2>_______________________________________________<br>gpfsug-discuss mailing list<br>gpfsug-discuss at spectrumscale.org</font></tt><font size=3 color=blue><u><br></u></font><a href="https://urldefense.proofpoint.com/v2/url?u=http-3A__gpfsug.org_mailman_listinfo_gpfsug-2Ddiscuss&d=DwMFAw&c=jf_iaSHvJObTbx-siA1ZOg&r=cvpnBBH0j41aQy0RPiG2xRL_M8mTc1izuQD3_PmtjZ8&m=vq-nGaYTObfhVeW9E8fpLCJ9MIi9SNCiO5yYfXwJWhY&s=9o--h1_iFfwOmI2jRmxRjZSJX7IfQSFwUi6AfFhEas0&e="><tt><font size=2 color=blue><u>http://gpfsug.org/mailman/listinfo/gpfsug-discuss</u></font></tt></a><font size=3><br><br><br></font><tt><font size=2>_______________________________________________<br>gpfsug-discuss mailing list<br>gpfsug-discuss at spectrumscale.org<br></font></tt><a href="https://urldefense.proofpoint.com/v2/url?u=http-3A__gpfsug.org_mailman_listinfo_gpfsug-2Ddiscuss&d=DwICAg&c=jf_iaSHvJObTbx-siA1ZOg&r=cvpnBBH0j41aQy0RPiG2xRL_M8mTc1izuQD3_PmtjZ8&m=vq-nGaYTObfhVeW9E8fpLCJ9MIi9SNCiO5yYfXwJWhY&s=9o--h1_iFfwOmI2jRmxRjZSJX7IfQSFwUi6AfFhEas0&e="><tt><font size=2>https://urldefense.proofpoint.com/v2/url?u=http-3A__gpfsug.org_mailman_listinfo_gpfsug-2Ddiscuss&d=DwICAg&c=jf_iaSHvJObTbx-siA1ZOg&r=cvpnBBH0j41aQy0RPiG2xRL_M8mTc1izuQD3_PmtjZ8&m=vq-nGaYTObfhVeW9E8fpLCJ9MIi9SNCiO5yYfXwJWhY&s=9o--h1_iFfwOmI2jRmxRjZSJX7IfQSFwUi6AfFhEas0&e=</font></tt></a><tt><font size=2><br></font></tt><br><br><BR>