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</o:shapelayout></xml><![endif]--></head><body lang=EN-CA link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Hi,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I’m seeing what appears to be <a href="https://jira.hpdd.intel.com/browse/LU-4397">LU-4397</a> on a newly installed Lustre 2.8.0 (CentOS 7) system. I disabled an OST on the MGS using <span style='font-family:"Courier New"'>lctl conf_param data-OST0001.osc.active=0, </span>and the clients can mount and use the file system, however df on the clients hangs for about 100s before returning the results. Setting lazystatfs using <span style='font-family:"Courier New"'>lctl conf_param data.llite.lazystatfs=1 </span>resolves the issue. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Interestingly, CentOS 6 clients don’t have this issue, only CentOS 7 clients. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Also of note, CentOS 6 clients show the OST as Inactive, but the CentOS 7 clients don’t (note data-OST0001 in these two listings).<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='font-family:"Courier New"'>[root@x92 ~]# lctl dl<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'> 0 UP mgc MGC10.1.0.200@o2ib 1a4b524d-6171-72a0-670b-58524f5135c9 5<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'> 1 UP lov data-clilov-ffff8804bcaafc00 a4e753f1-6495-dfe9-d854-8d3e7305b6e8 4<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'> 2 UP lmv data-clilmv-ffff8804bcaafc00 a4e753f1-6495-dfe9-d854-8d3e7305b6e8 4<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'> 3 UP mdc data-MDT0000-mdc-ffff8804bcaafc00 a4e753f1-6495-dfe9-d854-8d3e7305b6e8 5<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'> 4 UP osc data-OST0005-osc-ffff8804bcaafc00 a4e753f1-6495-dfe9-d854-8d3e7305b6e8 5<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'> 5 UP osc data-OST0002-osc-ffff8804bcaafc00 a4e753f1-6495-dfe9-d854-8d3e7305b6e8 5<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'> 6 UP osc data-OST0004-osc-ffff8804bcaafc00 a4e753f1-6495-dfe9-d854-8d3e7305b6e8 5<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'> 7 UP osc data-OST0003-osc-ffff8804bcaafc00 a4e753f1-6495-dfe9-d854-8d3e7305b6e8 5<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'> 8 IN osc data-OST0001-osc-ffff8804bcaafc00 a4e753f1-6495-dfe9-d854-8d3e7305b6e8 5<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'>[root@x87 ~]# lctl dl<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'> 0 UP mgc MGC10.1.0.200@o2ib e5ab9926-ffa3-2c47-3851-e480303a42cc 5<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'> 1 UP lov data-clilov-ffff88031ef85000 213b8ef0-18f9-b7d7-7c43-c8dfb333a11f 4<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'> 2 UP lmv data-clilmv-ffff88031ef85000 213b8ef0-18f9-b7d7-7c43-c8dfb333a11f 4<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'> 3 UP mdc data-MDT0000-mdc-ffff88031ef85000 213b8ef0-18f9-b7d7-7c43-c8dfb333a11f 5<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'> 4 UP osc data-OST0005-osc-ffff88031ef85000 213b8ef0-18f9-b7d7-7c43-c8dfb333a11f 5<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'> 5 UP osc data-OST0002-osc-ffff88031ef85000 213b8ef0-18f9-b7d7-7c43-c8dfb333a11f 5<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'> 6 UP osc data-OST0004-osc-ffff88031ef85000 213b8ef0-18f9-b7d7-7c43-c8dfb333a11f 5<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'> 7 UP osc data-OST0003-osc-ffff88031ef85000 213b8ef0-18f9-b7d7-7c43-c8dfb333a11f 5<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'> 8 UP osc data-OST0001-osc-ffff88031ef85000 213b8ef0-18f9-b7d7-7c43-c8dfb333a11f 4<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-language:EN-CA'>Ron Jerome<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-language:EN-CA'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-language:EN-CA'>Team Leader, Infrastructure/Operations<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-language:EN-CA'>Supercomputing Directorate<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-language:EN-CA'>Shared Services Canada / Government of Canada<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black;mso-fareast-language:EN-CA'><br><br><o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>