<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
<meta name="Generator" content="Microsoft Word 15 (filtered medium)">
<!--[if !mso]><style>v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style><![endif]--><style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:"Calibri",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri",sans-serif;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang="EN-US" link="#0563C1" vlink="#954F72" style="word-wrap:break-word">
<div class="WordSection1">
<p class="MsoNormal">Hello all,<o:p></o:p></p>
<p class="MsoNormal">I’ve been on the mailing list for a few years but have not been active except my introduction email.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">We are having an issue I’d like to run past everyone and see if anyone has experience that may help.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Currently using Spectrum Scale Data Management Edition 5.1.1.0<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Our Spectrum Scale cluster is running on Linux VMs on IBM z/VM. We have one application that
<br>
cannot support the z/VM architecture so we used to have those servers running on VMware in our<br>
datacenter and those servers were client nodes in the Spectrum Scale cluster. This configuration<br>
worked great. We recently retired VMWare and moved all that workload to AWS. Because this
<br>
was no longer on our LAN we thought it would be a good idea (IBM support also recommended it) to
<br>
use CES NFS rather than adding the AWS instances to the cluster. Since doing this we have seen
<br>
problems under high IO. Some NFS clients will try to access files that don’t seem to be there
<br>
resulting in file not found errors. We know the files have been created but the NFS clients can’t
<br>
see them. The read process runs successfully shortly after. We are not saturating our AWS
<br>
connection.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I haven’t seen any NFS tuning that looks like it would help, but that is an option I would be willing to try.
<br>
The other option I’m thinking about is just adding the NFS clients to the cluster. Has anyone spanned
<br>
datacenters like this?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks, any help is appreciated.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">-Bill<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:11.5pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.5pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<table class="MsoTableGrid" border="0" cellspacing="0" cellpadding="0" style="margin-left:-.25pt;border-collapse:collapse;border:none">
<tbody>
<tr style="height:82.35pt">
<td width="312" valign="top" style="width:3.25in;padding:0in 5.4pt 0in 5.4pt;height:82.35pt">
<p class="MsoNormal" style="line-height:115%"><b><span lang="EN-GB" style="font-size:11.5pt;line-height:115%;font-family:"Arial",sans-serif;color:#32ABC8">Bill Peters</span></b><span style="font-size:12.0pt;line-height:115%"><o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:115%"><span lang="EN-GB" style="font-size:11.5pt;line-height:115%;font-family:"Arial",sans-serif;color:#595959">Senior Platform Engineer</span><span style="font-size:12.0pt;line-height:115%"><o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:115%"><span lang="EN-GB" style="font-size:11.5pt;line-height:115%;font-family:"Arial",sans-serif;color:#595959">703-475-3386</span><span style="font-size:11.5pt;line-height:115%;font-family:"Arial",sans-serif;color:#595959"><o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:115%"><span style="font-size:12.0pt;line-height:115%;color:#595959"><a href="mailto:wpeters@atpco.net">wpeters<span style="font-size:11.5pt;line-height:115%;font-family:"Arial",sans-serif">@atpco.net</span></a></span><span style="font-size:11.5pt;line-height:115%;font-family:"Arial",sans-serif;color:#595959">
</span><span style="font-size:12.0pt;line-height:115%"><br>
<br>
</span><span style="font-size:11.5pt;line-height:115%;font-family:"Arial",sans-serif;color:#595959"><o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:115%"><span lang="EN-GB" style="font-size:11.5pt;line-height:115%;font-family:"Arial",sans-serif;color:#32ABC8">atpco.net</span><span style="font-size:12.0pt;line-height:115%"><o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:115%"><span lang="EN-GB" style="font-size:11.5pt;line-height:115%;font-family:"Arial",sans-serif;color:#595959">45005 Aviation Drive<o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:115%"><span lang="EN-GB" style="font-size:11.5pt;line-height:115%;font-family:"Arial",sans-serif;color:#595959">Dulles, VA 20166</span><span style="font-size:12.0pt;line-height:115%"><br>
<br>
</span><span style="font-size:11.5pt;line-height:115%;font-family:"Arial",sans-serif;color:black"><o:p></o:p></span></p>
</td>
</tr>
<tr style="height:67.45pt">
<td width="312" valign="top" style="width:3.25in;padding:0in 5.4pt 0in 5.4pt;height:67.45pt">
<p class="MsoNormal" style="line-height:115%"><span style="font-size:12.0pt;line-height:115%"><a href="http://bit.ly/35vlWu3"><span style="color:windowtext;text-decoration:none"><img border="0" width="362" height="96" style="width:3.7708in;height:1.0in" id="Picture_x0020_33" src="cid:image001.png@01D946B7.6FE37F40" alt="A close up of a sign
Description automatically generated"></span></a></span><b><span style="font-size:10.0pt;line-height:115%;font-family:"Arial",sans-serif;color:#32ABC8"><o:p></o:p></span></b></p>
</td>
</tr>
<tr style="height:.3in">
<td width="312" style="width:3.25in;padding:0in 5.4pt 0in 5.4pt;height:.3in">
<p class="MsoNormal" style="line-height:115%"><span style="font-size:12.0pt;line-height:115%"><a href="https://www.facebook.com/atpconews/"><span style="font-size:8.0pt;line-height:115%;color:#32ABC8;text-decoration:none"><img border="0" width="19" height="19" style="width:.1979in;height:.1979in" id="Picture_x0020_14" src="cid:image002.png@01D946B7.6FE37F40" alt="Title: Facebook - Description: Facebook icon"></span></a></span><span style="font-size:8.0pt;line-height:115%;font-family:"Arial",sans-serif;color:#32ABC8">
</span><span style="font-size:12.0pt;line-height:115%"><a href="https://twitter.com/ATPCOnews"><span style="font-size:8.0pt;line-height:115%;color:#32ABC8;text-decoration:none"><img border="0" width="19" height="19" style="width:.1979in;height:.1979in" id="Picture_x0020_15" src="cid:image003.png@01D946B7.6FE37F40" alt="Title: Twitter - Description: Twitter icon"></span></a></span><span style="font-size:8.0pt;line-height:115%;font-family:"Arial",sans-serif;color:#32ABC8"> </span><span style="font-size:12.0pt;line-height:115%"><a href="https://www.linkedin.com/company/atpco/"><span style="font-size:8.0pt;line-height:115%;color:#32ABC8;text-decoration:none"><img border="0" width="19" height="19" style="width:.1979in;height:.1979in" id="Picture_x0020_16" src="cid:image004.png@01D946B7.6FE37F40" alt="Title: LinkedIn - Description: LinkedIn icon"></span></a></span><span style="font-size:8.0pt;line-height:115%;color:#32ABC8"><o:p></o:p></span></p>
</td>
</tr>
</tbody>
</table>
<p class="MsoNormal" style="line-height:115%"><span style="font-size:12.0pt;line-height:115%"><o:p> </o:p></span></p>
<p class="MsoNormal" style="line-height:115%"><b><span style="font-size:10.0pt;line-height:115%;font-family:"Arial",sans-serif;color:#32ABC8"><o:p> </o:p></span></b></p>
<p class="MsoNormal" style="line-height:115%"><b><span style="font-size:10.0pt;line-height:115%;font-family:"Arial",sans-serif;color:#32ABC8"><o:p> </o:p></span></b></p>
<p class="MsoNormal" style="line-height:115%"><b><span style="font-size:10.0pt;line-height:115%;font-family:"Arial",sans-serif;color:#32ABC8"><o:p> </o:p></span></b></p>
<p class="MsoNormal" style="line-height:115%"><b><span style="font-size:10.0pt;line-height:115%;font-family:"Arial",sans-serif;color:#32ABC8"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:#595959"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
</body>
</html>