<font size=2 face="sans-serif">Yes - it is a cluster.</font><br><br><font size=2 face="sans-serif">The sites should NOT be further than
a MAN - or Campus network. If you're looking to do this over a large distance
- it would be best to choose another GPFS solution (Multi-Cluster, AFM,
etc).</font><br><br><font size=2 face="sans-serif">Regards,</font><br><br><font size=3 color=#8f8f8f face="Arial"><b>Ken Hill</b></font><font size=2 face="Arial"><br>Technical Sales Specialist | Software Defined Solution Sales<br>IBM Systems</font><p><table width=776 style="border-collapse:collapse;"><tr height=8><td width=776 colspan=3 style="border-style:none none none none;border-color:#000000;border-width:0px 0px 0px 0px;padding:0px 0px;"><hr><tr height=8><td width=159 style="border-style:none none none none;border-color:#000000;border-width:0px 0px 0px 0px;padding:0px 0px;"><font size=1 color=#4181c0 face="Arial"><b>Phone:</b></font><font size=3 face="Arial"></font><font size=1 face="Arial">1-540-207-7270</font><font size=1 color=#4181c0 face="Arial"><b><br>E-mail:</b></font><font size=3 face="Arial"> </font><a href=mailto:kenh@us.ibm.com target=_blank><font size=1 color=#5f5f5f face="Arial"><u>kenh@us.ibm.com</u></font></a><td width=616 style="border-style:none none none none;border-color:#000000;border-width:0px 0px 0px 0px;padding:0px 0px;"><div align=right><a href="http://www.ibm.com/us-en/"><img src=cid:_4_0C2D95B80C2D920400002F0C85257FF7 style="border:0px solid;"></a><font size=3>
</font><a href="http://www-03.ibm.com/systems/platformcomputing/products/lsf/"><img src=cid:_4_0C2D9A300C2D920400002F0C85257FF7 style="border:0px solid;"></a><font size=3>
</font><a href="http://www-03.ibm.com/systems/platformcomputing/products/high-performance-services/index.html"><img src=cid:_4_0C2D9EA80C2D920400002F0C85257FF7 style="border:0px solid;"></a><font size=3>
</font><a href="http://www-03.ibm.com/systems/platformcomputing/products/symphony/index.html"><img src=cid:_4_0C2DA3200C2D920400002F0C85257FF7 style="border:0px solid;"></a><font size=3>
</font><a href="http://www-03.ibm.com/systems/storage/spectrum/"><img src=cid:_4_0C2DA7980C2D920400002F0C85257FF7 style="border:0px solid;"></a><font size=3>
</font><a href="http://www-01.ibm.com/software/tivoli/csi/cloud-storage/"><img src=cid:_4_0C2DAC100C2D920400002F0C85257FF7 style="border:0px solid;"></a><font size=3>
</font><a href="http://www-01.ibm.com/software/tivoli/csi/backup-recovery/"><img src=cid:_4_0C2DB0880C2D920400002F0C85257FF7 style="border:0px solid;"></a><font size=3>
</font><a href="http://www-03.ibm.com/systems/storage/tape/ltfs/index.html"><img src=cid:_4_0C2DB5000C2D920400002F0C85257FF7 style="border:0px solid;"></a><font size=3>
</font><a href="http://www-03.ibm.com/systems/storage/spectrum/"><img src=cid:_4_0C2DB9780C2D920400002F0C85257FF7 style="border:0px solid;"></a><font size=3>
</font><a href="http://www-03.ibm.com/systems/storage/spectrum/scale/"><img src=cid:_4_0C2DBDF00C2D920400002F0C85257FF7 style="border:0px solid;"></a><font size=3>
</font><a href="https://www.ibm.com/marketplace/cloud/object-storage/us/en-us"><img src=cid:_4_0C2DC2680C2D920400002F0C85257FF7 style="border:0px solid;"></a><font size=3>
<br></font><font size=1 face="Arial"><br>2300 Dulles Station Blvd<br>Herndon, VA 20171-6133<br>United States</font></div><td width=6 valign=top style="border-style:none none none none;border-color:#000000;border-width:0px 0px 0px 0px;padding:0px 0px;"></table><br><br><br><br><br><br><font size=1 color=#5f5f5f face="sans-serif">From:
</font><font size=1 face="sans-serif">"Mark.Bush@siriuscom.com"
<Mark.Bush@siriuscom.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">07/20/2016 07:33 PM</font><br><font size=1 color=#5f5f5f face="sans-serif">Subject:
</font><font size=1 face="sans-serif">Re: [gpfsug-discuss]
NDS in Two Site scenario</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="Calibri">So in this scenario Ken, can server3 see
any disks in site1? </font><br><font size=2 face="Calibri"> </font><br><font size=3 face="Calibri"><b>From: </b><gpfsug-discuss-bounces@spectrumscale.org>
on behalf of Ken Hill <kenh@us.ibm.com><b><br>Reply-To: </b>gpfsug main discussion list <gpfsug-discuss@spectrumscale.org><b><br>Date: </b>Wednesday, July 20, 2016 at 4:15 PM<b><br>To: </b>gpfsug main discussion list <gpfsug-discuss@spectrumscale.org><b><br>Subject: </b>Re: [gpfsug-discuss] NDS in Two Site scenario</font><br><font size=3 face="Times New Roman"> </font><br><font size=2 face="sans-serif"><br>
Site1
Site2<br>
Server1 (quorum 1)
Server3
(quorum 2)<br>
Server2
Server4</font><font size=3 face="Times New Roman"><br><br><br><br></font><font size=2 face="sans-serif"><br>
SiteX <br>
Server5 (quorum 3)</font><font size=3 face="Times New Roman"><br><br><br><br></font><font size=2 face="sans-serif"><br>You need to set up another site (or server) that is at least power isolated
(if not completely infrastructure isolated) from Site1 or Site2. You would
then set up a quorum node at that site | location. This insures you can
still access your data even if one of your sites go down.</font><font size=3 face="Times New Roman"><br></font><font size=2 face="sans-serif"><br>You can further isolate failure by increasing quorum (odd numbers).</font><font size=3 face="Times New Roman"><br></font><font size=2 face="sans-serif"><br>The way quorum works is: The majority of the quorum nodes need to be up
to survive an outage.<br> <br>- With 3 quorum nodes you can have 1 quorum node failures and continue
filesystem operations.<br>- With 5 quorum nodes you can have 2 quorum node failures and continue
filesystem operations.<br>- With 7 quorum nodes you can have 3 quorum node failures and continue
filesystem operations.<br>- etc</font><font size=3 face="Times New Roman"><br></font><font size=2 face="sans-serif"><br>Please see </font><a href="http://www.ibm.com/support/knowledgecenter/en/STXKQY_4.2.0/ibmspectrumscale42_content.html?view=kc"><font size=2 color=blue face="sans-serif"><u>http://www.ibm.com/support/knowledgecenter/en/STXKQY_4.2.0/ibmspectrumscale42_content.html?view=kc</u></font></a><font size=2 face="sans-serif">for
more information about quorum and tiebreaker disks.</font><font size=3 face="Times New Roman"><br></font><font size=3 color=#8f8f8f face="Arial"><b><br>Ken Hill</b></font><font size=2 face="Arial"><br>Technical Sales Specialist | Software Defined Solution Sales<br>IBM Systems</font><font size=3 face="Times New Roman"> </font><p><table width=775 style="border-collapse:collapse;"><tr height=8><td width=775 colspan=3 style="border-style:none none none none;border-color:#000000;border-width:0px 0px 0px 0px;padding:0px 0px;"><div align=center><hr></div><tr height=8><td width=158 style="border-style:none none none none;border-color:#000000;border-width:0px 0px 0px 0px;padding:0px 0px;"><font size=1 color=#4181c0 face="Arial"><b>Phone:</b></font><font size=1 face="Arial">1-540-207-7270</font><font size=1 color=#4181c0 face="Arial"><b><br>E-mail:</b></font><font size=3 face="Arial"> </font><a href=mailto:kenh@us.ibm.com target=_blank><font size=1 color=#5f5f5f face="Arial"><u>kenh@us.ibm.com</u></font></a><td width=611 style="border-style:none none none none;border-color:#000000;border-width:0px 0px 0px 0px;padding:0px 0px;"><div align=right><a href="http://www.ibm.com/us-en/"><img src=cid:_4_C585D3ACC7775E4400002F0C85257FF7 style="border:0px solid;"></a><font size=3 face="Times New Roman">
</font><a href="http://www-03.ibm.com/systems/platformcomputing/products/lsf/"><img src=cid:_4_C585D854C7775E4400002F0C85257FF7 style="border:0px solid;"></a><font size=3 face="Times New Roman">
</font><a href="http://www-03.ibm.com/systems/platformcomputing/products/high-performance-services/index.html"><img src=cid:_4_C585DCFCC7775E4400002F0C85257FF7 style="border:0px solid;"></a><font size=3 face="Times New Roman">
</font><a href="http://www-03.ibm.com/systems/platformcomputing/products/symphony/index.html"><img src=cid:_4_C585E1A4C7775E4400002F0C85257FF7 style="border:0px solid;"></a><font size=3 face="Times New Roman">
</font><a href="http://www-03.ibm.com/systems/storage/spectrum/"><img src=cid:_4_C585E64CC7775E4400002F0C85257FF7 style="border:0px solid;"></a><font size=3 face="Times New Roman">
</font><a href="http://www-01.ibm.com/software/tivoli/csi/cloud-storage/"><img src=cid:_4_C585EAF4C7775E4400002F0C85257FF7 style="border:0px solid;"></a><font size=3 face="Times New Roman">
</font><a href="http://www-01.ibm.com/software/tivoli/csi/backup-recovery/"><img src=cid:_4_C585EF9CC7775E4400002F0C85257FF7 style="border:0px solid;"></a><font size=3 face="Times New Roman">
</font><a href="http://www-03.ibm.com/systems/storage/tape/ltfs/index.html"><img src=cid:_4_C585F444C7775E4400002F0C85257FF7 style="border:0px solid;"></a><font size=3 face="Times New Roman">
</font><a href="http://www-03.ibm.com/systems/storage/spectrum/"><img src=cid:_4_C585F8ECC7775E4400002F0C85257FF7 style="border:0px solid;"></a><font size=3 face="Times New Roman">
</font><a href="http://www-03.ibm.com/systems/storage/spectrum/scale/"><img src=cid:_4_C585FD94C7775E4400002F0C85257FF7 style="border:0px solid;"></a><font size=3 face="Times New Roman">
</font><a href="https://www.ibm.com/marketplace/cloud/object-storage/us/en-us"><img src=cid:_4_C586023CC7775E4400002F0C85257FF7 style="border:0px solid;"></a><font size=3 face="Times New Roman">
</font><font size=1 face="Arial"><br><br>2300 Dulles Station Blvd<br>Herndon, VA 20171-6133<br>United States</font></div><td width=6 valign=top style="border-style:none none none none;border-color:#000000;border-width:0px 0px 0px 0px;padding:0px 0px;"></table><p><font size=3 face="Times New Roman"><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@siriuscom.com"
<Mark.Bush@siriuscom.com></font><font size=1 color=#5f5f5f face="sans-serif"><br>To: </font><font size=1 face="sans-serif">gpfsug
main discussion list <gpfsug-discuss@spectrumscale.org></font><font size=1 color=#5f5f5f face="sans-serif"><br>Date: </font><font size=1 face="sans-serif">07/20/2016
04:47 PM</font><font size=1 color=#5f5f5f face="sans-serif"><br>Subject: </font><font size=1 face="sans-serif">[gpfsug-discuss]
NDS in Two Site scenario</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><div align=center><hr noshade></div><br><font size=3 face="Times New Roman"><br><br></font><font size=2 face="Calibri"><br>For some reason this concept is a round peg that doesn’t fit the square
hole inside my brain. Can someone please explain the best practice
to setting up two sites same cluster? I get that I would likely have
two NDS nodes in site 1 and two NDS nodes in site two. What I don’t
understand are the failure scenarios and what would happen if I lose one
or worse a whole site goes down. Do I solve this by having scale
replication set to 2 for all my files? I mean a single site I think
I get it’s when there are two datacenters and I don’t want two clusters
typically.<br> <br> <br> </font><font size=2 color=#002f80 face="Calibri"><br>Mark R. Bush</font><font size=2 face="Calibri">| Solutions Architect<br>Mobile: 210.237.8415 | mark.bush@siriuscom.com<br>Sirius Computer Solutions | </font><a href=http://www.siriuscom.com/><font size=2 color=blue face="Calibri"><u>www.siriuscom.com</u></font></a><font size=2 face="Calibri"><br>10100 Reunion Place, Suite 500, San Antonio, TX 78216 </font><font size=3 face="Calibri"><br> </font><font size=3 face="Times New Roman"> </font><p><font size=1 face="Cambria">This message (including any attachments)
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