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<p class="MsoNormal"><b><u><span style="font-family:"Trebuchet MS",sans-serif;color:black">UNCLASSIFIED</span></u></b><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US">Hi Everybody;<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">We have a performance problem with small files on our HPC system (120 compute nodes). Our all OSS targets are classic spinning HDDs. To speed up, I want to configure Data on Metadata. Our metadata target has SDD disks.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Underlying file systems are ZFS (for OSS and Meta)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Lustre version: 2.12.5<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">ZFS version: .0.7.13<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Our Lustre file system size is 720TB (2 OSS servers, 1 enclosure with 6 zpools), Metadata file system size is 2.1TB(1 enclosure and 1 metadata target).<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">What is your opinions to speed up this setup? I want to configure DoM but I am concerning about Metadata size. My questions:<o:p></o:p></span></p>
<ol style="margin-top:0cm" start="1" type="1">
<li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo1"><span lang="EN-US">How can I increase Medatadata size? Metadata enclosure has a empty slots. Is there a way to increase size online/offline?<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo1"><span lang="EN-US">Is it possible to migrate big files from DoM to OSS targets completely? Off course online migration. (So I think I can free Metadata for new small files).<o:p></o:p></span></li></ol>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Best Regards;<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Taner<o:p></o:p></span></p>
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<STRONG><FONT color=#ff0000>Dikkat:</FONT></STRONG></P>
<P></P>
<P>Bu elektronik posta mesaji kisisel ve ozeldir. Eger size gonderilmediyse
lutfen gondericiyi bilgilendirip mesaji siliniz. Firmamiza gelen
ve giden mesajlar virus taramasindan gecirilmekte, guvenlik nedeni ile
kontrol edilerek saklanmaktadir. Mesajdaki gorusler ve bakis acisi gondericiye
ait olup Aselsan A.S. resmi gorusu olmak zorunda degildir.</P><FONT
color=#ff0000><STRONG>
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</STRONG></FONT><STRONG><FONT color=#ff0000>Attention: </FONT></STRONG>
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