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Hi Francisco,<br>
<br>
Just to make sure. You are aware that it will only work for new
files/dirs under "<i>folder_name</i>"? Also, only small files or the
first part of a large file (<32M) will get a performance benefit.<br>
<br>
Cheers,<br>
Hans Henrik<br>
<br>
<br>
<div class="moz-cite-prefix">On 30.09.2022 14.16, Cloete, F.
(Francois) via lustre-discuss wrote:<br>
</div>
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<p class="MsoNormal">Good day Lustre Community.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Would appreciate any guidance regarding
best practices on the below DOM Lustre config in our
environment.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">We have applied DOM on our Application
file-systems thinking that this would give us a performance
benefit in our environment.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">We have not noticed any significant
performance benefit after applying these changes.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Below is the setstripe command used for the
folders mentioned above.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><i>lfs setstripe -E 32M -L mdt -E -1 -S 4M
folder_name<o:p></o:p></i></p>
<p class="MsoNormal"><i><o:p> </o:p></i></p>
<p class="MsoNormal"><i>Below are the versions we are using.<o:p></o:p></i></p>
<p class="MsoNormal"><i>[root@server1 ~]# rpm -qa|grep -i lustre<o:p></o:p></i></p>
<p class="MsoNormal"><i>kmod-lustre-osd-ldiskfs-2.12.8_6_g5457c37-1.el7.x86_64<o:p></o:p></i></p>
<p class="MsoNormal"><i>kernel-3.10.0-1160.49.1.el7_lustre.x86_64<o:p></o:p></i></p>
<p class="MsoNormal"><i>kernel-headers-3.10.0-1160.49.1.el7_lustre.x86_64<o:p></o:p></i></p>
<p class="MsoNormal"><i>lustre-tests-2.12.8_6_g5457c37-1.el7.x86_64<o:p></o:p></i></p>
<p class="MsoNormal"><i>lustre-osd-ldiskfs-mount-2.12.8_6_g5457c37-1.el7.x86_64<o:p></o:p></i></p>
<p class="MsoNormal"><i>lustre-iokit-2.12.8_6_g5457c37-1.el7.x86_64<o:p></o:p></i></p>
<p class="MsoNormal"><i>lustre-resource-agents-2.12.8_6_g5457c37-1.el7.x86_64<o:p></o:p></i></p>
<p class="MsoNormal"><i>kmod-lustre-2.12.8_6_g5457c37-1.el7.x86_64<o:p></o:p></i></p>
<p class="MsoNormal"><i>kmod-lustre-tests-2.12.8_6_g5457c37-1.el7.x86_64<o:p></o:p></i></p>
<p class="MsoNormal"><i>lustre-2.12.8_6_g5457c37-1.el7.x86_64<o:p></o:p></i></p>
<p class="MsoNormal"><i><o:p> </o:p></i></p>
<p class="MsoNormal"><i><o:p> </o:p></i></p>
<p class="MsoNormal"><i>[root@server ~]# cat /etc/*release*<o:p></o:p></i></p>
<p class="MsoNormal"><i>NAME="Red Hat Enterprise Linux Server"<o:p></o:p></i></p>
<p class="MsoNormal"><i>VERSION="7.9 (Maipo)"<o:p></o:p></i></p>
<p class="MsoNormal"><i>ID="rhel"<o:p></o:p></i></p>
<p class="MsoNormal"><i>ID_LIKE="fedora"<o:p></o:p></i></p>
<p class="MsoNormal"><i>VARIANT="Server"<o:p></o:p></i></p>
<p class="MsoNormal"><i>VARIANT_ID="server"<o:p></o:p></i></p>
<p class="MsoNormal"><i>VERSION_ID="7.9"<o:p></o:p></i></p>
<p class="MsoNormal"><i>PRETTY_NAME="Red Hat Enterprise Linux"<o:p></o:p></i></p>
<p class="MsoNormal"><i>ANSI_COLOR="0;31"<o:p></o:p></i></p>
<p class="MsoNormal"><i>CPE_NAME="cpe:/o:redhat:enterprise_linux:7.9:GA:server"<o:p></o:p></i></p>
<p class="MsoNormal"><i>HOME_URL=<a
href="https://www.redhat.com/" moz-do-not-send="true"
class="moz-txt-link-freetext">https://www.redhat.com/</a><o:p></o:p></i></p>
<p class="MsoNormal"><i>BUG_REPORT_URL=<a
href="https://bugzilla.redhat.com/" moz-do-not-send="true"
class="moz-txt-link-freetext">https://bugzilla.redhat.com/</a><o:p></o:p></i></p>
<p class="MsoNormal"><i><o:p> </o:p></i></p>
<p class="MsoNormal"><i>REDHAT_BUGZILLA_PRODUCT="Red Hat
Enterprise Linux 7"<o:p></o:p></i></p>
<p class="MsoNormal"><i>REDHAT_BUGZILLA_PRODUCT_VERSION=7.9<o:p></o:p></i></p>
<p class="MsoNormal"><i>REDHAT_SUPPORT_PRODUCT="Red Hat
Enterprise Linux"<o:p></o:p></i></p>
<p class="MsoNormal"><i>REDHAT_SUPPORT_PRODUCT_VERSION="7.9"<o:p></o:p></i></p>
<p class="MsoNormal"><i>Red Hat Enterprise Linux Server release
7.9 (Maipo)<o:p></o:p></i></p>
<p class="MsoNormal"><i>Red Hat Enterprise Linux Server release
7.9 (Maipo)<o:p></o:p></i></p>
<p class="MsoNormal"><i>cpe:/o:redhat:enterprise_linux:7.9:ga:server<o:p></o:p></i></p>
<p class="MsoNormal"><i><o:p> </o:p></i></p>
<p class="MsoNormal"><i>We are using ldiskfs on rhel7.9 VM’s in
azure.<o:p></o:p></i></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks<o:p></o:p></p>
<p class="MsoNormal">Francois <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<br>
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