<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=utf-8">
<meta name="Generator" content="Microsoft Word 15 (filtered medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:SimSun;
panose-1:2 1 6 0 3 1 1 1 1 1;}
@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;}
@font-face
{font-family:"\@SimSun";
panose-1:2 1 6 0 3 1 1 1 1 1;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman",serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
span.EmailStyle17
{mso-style-type:personal-reply;
font-family:"Calibri",sans-serif;
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@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="blue" vlink="purple">
<div class="WordSection1">
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Dear All:
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">The best practice of DGX-1 on storage for DL, requires 4x SSDs to be local cache backend to improve IO performance by using Linux
<b><u>cacheFS</u></b>. <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><a href="http://docs.nvidia.com/deeplearning/dgx/pdf/Best-Practices.pdf">http://docs.nvidia.com/deeplearning/dgx/pdf/Best-Practices.pdf</a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">6.1.1. Internal Storage<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">The first storage consideration is storage within the DGX-1 itself. For the best possible performance, a NFS read cache has been included in the DGX-1 appliance
using the Linux cacheFS capability. It uses four SSD’s in a RAID-0 group. The drives are connected to a dedicated hardware RAID controller.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">I looked Redhat Linux, the manual shows the
<b><u>FS-Cache</u></b> is a persistent local cache that can be used by file systems to take data retrieved from over the network and cache it on local disk. This helps minimize network traffic for users accessing data from a file system mounted over the network
(for example, NFS).<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><a href="https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/storage_administration_guide/ch-fscache">https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/storage_administration_guide/ch-fscache</a>
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Can Linux FS-Cache/CacheFS run on Lustre 2.10.x or will the Persistent Client-side Cache on Lustre 2.12 have the same function as FS-Cache on NFS to be released
next year ?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal" style="line-height:12.0pt;mso-line-height-rule:exactly"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Thanks,
</span><span style="color:#44546A"><o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:12.0pt;mso-line-height-rule:exactly"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Forrest Ling (</span><span lang="ZH-CN" style="font-size:11.0pt;font-family:SimSun;color:#1F497D">凌巍才</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">)</span><span style="color:#44546A"><o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:12.0pt;mso-line-height-rule:exactly"><span style="color:#44546A"><a href="tel:%2B86%2018600622522" target="_blank"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">+86 18600622522</span></a><o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:12.0pt;mso-line-height-rule:exactly"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Dell HPC Product Technologist Greater China</span><span style="color:#44546A"><o:p></o:p></span></p>
</div>
</body>
</html>