[lustre-discuss] Mounting troubles on Rocky 9.6 and 2.17.50 tag

[Nathan Dauchy]

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.

-Nathan

Get Outlook for Android<https://aka.ms/AAb9ysg>
________________________________
From: lustre-discuss <lustre-discuss-bounces at lists.lustre.org> on behalf of Stepan Beskrovnyy via lustre-discuss <lustre-discuss at lists.lustre.org>
Sent: Wednesday, January 14, 2026 4:31:44 AM
To: lustre-discuss at lists.lustre.org <lustre-discuss at lists.lustre.org>
Subject: [lustre-discuss] Mounting troubles on Rocky 9.6 and 2.17.50 tag

External email: Use caution opening links or attachments

Hi Everyone!

Building from source lustre tag v2.17.50 on custom Rocky Linux 9.6
Linux Kernel version 5.14.0-570.58.1 .
Building from source via tutorial https://wiki.whamcloud.com/pages/viewpage.action?pageId=427393157
Build goes well, kernel modules loading successfully.
llmount.sh goes well too, and fio benchmark works successfully on test filesystem
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). [image.png]
But mounting processes seemed to be ok.
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. [image.png]
If I copy small files like 10Kb, copying ends successfully, with the same errors.
If I copy bigger directory, like ior, then copying freeze with errors like on second picture.
Any thoughts ? What do I do wrong ? How can I debug this?
Thanks,
Stepan

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.lustre.org/pipermail/lustre-discuss-lustre.org/attachments/20260114/fe80ac7a/attachment-0001.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image.png
Type: image/png
Size: 33731 bytes
Desc: image.png
URL: <http://lists.lustre.org/pipermail/lustre-discuss-lustre.org/attachments/20260114/fe80ac7a/attachment-0002.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image.png
Type: image/png
Size: 171891 bytes
Desc: image.png
URL: <http://lists.lustre.org/pipermail/lustre-discuss-lustre.org/attachments/20260114/fe80ac7a/attachment-0003.png>