<div class="socmaildefaultfont" dir="ltr" style="font-family:Arial, Helvetica, sans-serif;font-size:10.5pt" ><div dir="ltr" >Aaron,</div>
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<div dir="ltr" >yes its possible - couple of thins you need to consider</div>
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<div dir="ltr" >JBOD means that there is no data resiliency at a hardware level</div>
<div dir="ltr" >this means that you need to have some level of software based data resiliency</div>
<div dir="ltr" >Typically this implies either 2 or more copies of the data (on independent resilient hardware)</div>
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<div dir="ltr" >in your scenario this would typically mean 1/2 the drives from JBOD1 + 1/2 the drives from JBOD2</div>
<div dir="ltr" >configured into Filesystem 1</div>
<div dir="ltr" >1/2 the drives from JBOD 1 + 1/2 the Drives from JBOD2 configured into Filesystem2</div>
<div dir="ltr" >the net result being that you will end up with 50% of your available capacity presented to your Filesystems</div>
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<div dir="ltr" >if you want more information on how this works look up FPO in the Spectrum Scale Knowledge Centre</div>
<div dir="ltr" > </div>
<div dir="ltr" >The other scenario that you can consider is if you look at Scale Erasure Code Edition (Scale ECE)</div>
<div dir="ltr" >you need a minimum of 4 Servers for Scale ECE but with Scale ECE you do get Raid 4+2P, Raid 4+3P</div>
<div dir="ltr" >Raid 8+2P and Raid8+3P options, as well as 2 copy and 3copy options -- you would need to reach out to your local IBM team to validate if Scale ECE would be supported with JBOD shelves presented to multiple servers.</div>
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<div dir="ltr" >Regards</div>
<div dir="ltr" > </div>
<div dir="ltr" ><div class="socmaildefaultfont" dir="ltr" style="font-family:Arial, Helvetica, sans-serif;font-size:10.5pt" ><div class="socmaildefaultfont" dir="ltr" style="font-family:Arial;font-size:10.5pt" ><div class="socmaildefaultfont" dir="ltr" style="font-family:Arial;font-size:10.5pt" ><div class="socmaildefaultfont" dir="ltr" style="font-family:Arial;font-size:10.5pt" ><div dir="ltr" style="margin-top: 20px;" ><div style="font-size: 12pt; font-weight: bold; font-family: sans-serif; color: #7C7C5F;" >Andrew Beattie</div>
<div style="font-size: 10pt; font-weight: bold; font-family: sans-serif;" >File and Object Storage Technical Specialist - A/NZ</div>
<div style="font-size: 10pt; font-weight: bold; font-family: sans-serif;" >IBM Systems - Storage</div>
<div style="font-size: 8pt; font-family: sans-serif; margin-top: 10px;" ><div><span style="font-weight: bold; color: #336699;" >Phone: </span>614-2133-7927</div>
<div><span style="font-weight: bold; color: #336699;" >E-mail: </span><a href="mailto:abeattie@au1.ibm.com" style="color: #555">abeattie@au1.ibm.com</a></div></div></div></div></div></div></div></div>
<div dir="ltr" > </div>
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<blockquote data-history-content-modified="1" dir="ltr" style="border-left:solid #aaaaaa 2px; margin-left:5px; padding-left:5px; direction:ltr; margin-right:0px" >----- Original message -----<br>From: Aaron Turner <A.Turner@lboro.ac.uk><br>Sent by: gpfsug-discuss-bounces@spectrumscale.org<br>To: "gpfsug-discuss@spectrumscale.org" <gpfsug-discuss@spectrumscale.org><br>Cc:<br>Subject: [EXTERNAL] [gpfsug-discuss] Identifiable groups of disks?<br>Date: Tue, May 14, 2019 6:47 PM<br> <br><!--Notes ACF
<meta http-equiv="Content-Type" content="text/html; charset=utf8" >-->
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" >Scenario:</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" > </div>
<div style="" ><ul style="" > <li style="" ><font face="Calibri, Arial, Helvetica, sans-serif" color="#000000" >one set of JBODS</font></li> <li style="" ><font face="Calibri, Arial, Helvetica, sans-serif" color="#000000" >want to create two GPFS file systems</font></li> <li style="" ><font face="Calibri, Arial, Helvetica, sans-serif" color="#000000" >want to ensure that file system A uses physical disks a0, a1... an-1 and file system B uses physical disks b0, b1... bn-1</font></li> <li style="" ><font face="Calibri, Arial, Helvetica, sans-serif" color="#000000" >want to be able to assign specific sets of disks a0..an-1, b0..bn-1 on creation</font></li> <li style="" ><font face="Calibri, Arial, Helvetica, sans-serif" color="#000000" >Potentially allows all disks b0..bn-1 to be destroyed if required whilst not affecting a0..an-1</font></li></ul>
<div><font face="Calibri, Arial, Helvetica, sans-serif" color="#000000" >Is this possible in GPFS?</font></div>
<div> </div>
<div><font face="Calibri, Arial, Helvetica, sans-serif" color="#000000" >Regards</font></div></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" > </div>
<div id="Signature" ><div id="divtagdefaultwrapper" style="font-size:12pt; color:#000000; background-color:#FFFFFF; font-family:Calibri,Arial,Helvetica,sans-serif" >______________________________________
<div><em style="font-family:'Palatino Linotype','Book Antiqua',Palatino,serif; font-size:10pt" >Aaron Turner</em>
<div><div><span style="font-family:'Palatino Linotype','Book Antiqua',Palatino,serif; font-size:10pt" ><em>Senior IT Services Specialist in High Performance Computing</em></span></div></div>
<div><span style="font-family:'Palatino Linotype','Book Antiqua',Palatino,serif; font-size:10pt" ><em>Loughborough University</em></span></div>
<div><span style="font-family:'Palatino Linotype','Book Antiqua',Palatino,serif; font-size:10pt" ><em>a.turner@lboro.ac.uk</em></span></div>
<div><span style="font-family:'Palatino Linotype','Book Antiqua',Palatino,serif; font-size:10pt" ><em>01509 226185</em></span></div>
<div> </div>
<div><span style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:16px; background-color:rgb(255,255,255)" >______________________________________</span>
<div> </div></div></div></div></div>
<div><font size="2" face="Default Monospace,Courier New,Courier,monospace" >_______________________________________________<br>gpfsug-discuss mailing list<br>gpfsug-discuss at spectrumscale.org<br><a href="http://gpfsug.org/mailman/listinfo/gpfsug-discuss" target="_blank">http://gpfsug.org/mailman/listinfo/gpfsug-discuss</a></font></div></blockquote>
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