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Have you tried lfs check servers on the login node?<br>
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<blockquote type="cite">On Oct 11, 2021, at 2:58 AM, Sid Young via lustre-discuss <lustre-discuss@lists.lustre.org> wrote:<br>
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<div>I'm having trouble diagnosing where the problem lies in my Lustre installation, clients are 2.12.6 and I have a /home and /lustre filesystems using Lustre. </div>
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<div>/home has 4 OSTs and /lustre is made up of 6 OSTs. lfs df shows all OSTs as ACTIVE.</div>
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<div>The /lustre file system appears fine, I can <b>ls </b>into every directory.</div>
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<div>When people log into the login node, it appears to lockup. I have shut down everything and remounted the OSTs and MDTs etc in order with no errors reporting but I'm getting the lockup issue soon after a few people log in.</div>
<div>The backend network is 100G Ethernet using ConnectX5 cards and the OS is Cento 7.9, everything was installed as RPMs and updates are disabled in yum.conf </div>
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<div>Two questions to start with:</div>
<div>Is there a command line tool to check each OST individually? </div>
<div>Apart from /var/log/messages, is there a lustre specific log I can monitor on the login node to see errors when I hit /home... </div>
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<div>Sid Young</div>
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