<div dir="auto">Hello,</div><div dir="auto"><br></div><div dir="auto">Yes. You may boot into the old linux kernel and erase/install/downgrade to your desired Lustre version. </div><div dir="auto"><br></div><div dir="auto">Best wishes,</div><div dir="auto">Megan</div><div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Jul 27, 2021 at 8:53 PM Haoyang Liu <<a href="mailto:liuhaoyang@pku.edu.cn">liuhaoyang@pku.edu.cn</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><p>
Hello Megan:
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After checking the yum log, I found the following packages were also updated:
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<span style="font-family:SimSun;font-size:13px;white-space:normal">Jul 24 10:30:07 Updated: lustre-modules-2.7.19.8-3.10.0_514.2.2.el7_lustre.x86_64.x86_64</span><br style="font-family:宋体,arial,Verdana,sans-serif;font-size:14px;white-space:normal">
<span style="font-family:SimSun;font-size:13px;white-space:normal">Jul 24 10:30:07 Updated: lustre-osd-ldiskfs-mount-2.7.19.8-3.10.0_514.2.2.el7_lustre.x86_64.x86_64</span><br style="font-family:宋体,arial,Verdana,sans-serif;font-size:14px;white-space:normal">
<span style="font-family:SimSun;font-size:13px;white-space:normal">Jul 24 10:31:35 Updated: lustre-osd-ldiskfs-2.7.19.8-3.10.0_514.2.2.el7_lustre.x86_64.x86_64</span><br style="font-family:宋体,arial,Verdana,sans-serif;font-size:14px;white-space:normal">
<span style="font-family:SimSun;font-size:13px;white-space:normal">Jul 24 10:31:36 Updated: lustre-2.7.19.8-3.10.0_514.2.2.el7_lustre.x86_64.x86_64</span><br style="font-family:宋体,arial,Verdana,sans-serif;font-size:14px;white-space:normal">
<span style="font-family:SimSun;font-size:13px;white-space:normal">Jul 24 10:33:04 Installed: lustre-osd-zfs-2.7.19.8-3.10.0_514.2.2.el7_lustre.x86_64.x86_64</span>
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Is it safe to 1) boot into the old kernel and 2) remove the updated lustre packages and 3) install the old packages?
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Thanks,
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Haoyang
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<blockquote name="replyContent" style="padding-left:5px;margin-left:5px;border-left:#b6b6b6 2px solid;margin-right:0">
-----原始邮件-----<br>
<b>发件人:</b><span id="m_-5289287359032487511rc_from">"Ms. Megan Larko via lustre-discuss" <<a href="mailto:lustre-discuss@lists.lustre.org" target="_blank">lustre-discuss@lists.lustre.org</a>></span><br>
<b>发送时间:</b><span id="m_-5289287359032487511rc_senttime">2021-07-27 22:15:15 (星期二)</span><br>
<b>收件人:</b> "Lustre User Discussion Mailing List" <<a href="mailto:lustre-discuss@lists.lustre.org" target="_blank">lustre-discuss@lists.lustre.org</a>><br>
<b>抄送:</b> <br>
<b>主题:</b> [lustre-discuss] Recover from broken lustre updates</blockquote><blockquote name="replyContent" style="padding-left:5px;margin-left:5px;border-left:#b6b6b6 2px solid;margin-right:0"><br>
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Greetings!
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I've not seen a response to this post yet so I will chime in.
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If the only rpm change was the linux kernel then you should be able to reboot into the previous linux kernel. The CentOS distro, like most linux distros, will leave the old kernel rpms in place. You may use commands like "grub2 editenv list" to see what kernel is the current default; you may change the default, etc...
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I would try this first.
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Cheers,
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megan
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</blockquote></blockquote></div></div>-- <br><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature">Sent from Gmail Mobile</div>