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<p>This can happen if things are mis-configured.</p>
<p>realize slurmdbd is merely a daemon that talks to a database.</p>
<p>That database should be HA and separate from the slurmdbd
systems.<br>
For our location, we have a central DB server that both slurmdbd
systems point to. In this scenario, it is the db that ensures both
are getting accurate and current information.</p>
<p>Brian Andrus<br>
</p>
<div class="moz-cite-prefix">On 6/27/2022 9:15 AM,
<a class="moz-txt-link-abbreviated" href="mailto:taleintervenor@sjtu.edu.cn">taleintervenor@sjtu.edu.cn</a> wrote:<br>
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<p class="MsoNormal"><span lang="EN-US">Hi, all:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">We noticed that slurmdbd
provide the conf option <b>DbdBackupHost</b> for user to
set a secondary slurmdbd node. Since slurmdbd is closely
related to database, we wonder will multiple slurmdbd bring
up the split-brain danger, which is the common topic in
database high-available discussion. Will there be any case
in which slurmdbd_A and slurmdbd_B failed to recognize each
other’s state and both work as active node?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Another related question
is, when primary slurmdbd node work well, will standby
slurmdbd node write anything to database? If standby
slurmdbd won’t write anything, then is it safe to separately
connect slurmdbd_A to mysql_A, and slurmdbd_B to mysql_B,
and using multi-source replication to sync mysql_A with
mysql_B?<o:p></o:p></span></p>
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