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Since you are using the tcp network type and small transactions work but large IO stalls, I would venture a guess at an MTU mismatch. It's always a good idea to validate the underlying network before Lustre bringup.</div>
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-Nathan </div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> lustre-discuss <lustre-discuss-bounces@lists.lustre.org> on behalf of Stepan Beskrovnyy via lustre-discuss <lustre-discuss@lists.lustre.org><br>
<b>Sent:</b> Wednesday, January 14, 2026 4:31:44 AM<br>
<b>To:</b> lustre-discuss@lists.lustre.org <lustre-discuss@lists.lustre.org><br>
<b>Subject:</b> [lustre-discuss] Mounting troubles on Rocky 9.6 and 2.17.50 tag</font>
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<div>Hi Everyone! <br>
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Building from source lustre tag v2.17.50 on custom Rocky Linux 9.6 <br>
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<div>Linux Kernel version 5.14.0-570.58.1 . </div>
<div>Building from source via tutorial <a href="https://wiki.whamcloud.com/pages/viewpage.action?pageId=427393157">https://wiki.whamcloud.com/pages/viewpage.action?pageId=427393157</a> <br>
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<div>Build goes well, kernel modules loading successfully. <br>
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<div>llmount.sh goes well too, and fio benchmark works successfully on test filesystem <br>
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<div>Then, I start mounting mdt and oss on nodes, I get error (See first picture) that lustre cant found mount for OST(with mdt exact same problem). <img src="cid:ii_mkdxpwhx0" alt="image.png" width="557" height="35"></div>
<div>But mounting processes seemed to be ok. <br>
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<div>After mounting all filesystem and trying to cp something on it, I have problems like (See picture two) connect is not available and lustre cant find target. <img src="cid:ii_mkdxs0n51" alt="image.png" width="557" height="172"><br>
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If I copy small files like 10Kb, copying ends successfully, with the same errors. <br>
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If I copy bigger directory, like ior, then copying freeze with errors like on second picture. <br>
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Any thoughts ? What do I do wrong ? How can I debug this? <br>
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Thanks, <br>
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Stepan<br>
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