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<p>hallddb is back up and serving databases. The outage was less
than a minute. Twice the memory, twice the number of cores. We'll
see if this makes a difference... <br>
</p>
<div class="moz-cite-prefix">On 3/21/19 3:58 PM, Mark Ito wrote:<br>
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<p>Reminder: hallddb will have a service interruption tomorrow
morning.<br>
</p>
<div class="moz-cite-prefix">On 3/20/19 4:34 PM, Mark Ito wrote:<br>
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<p>Folks,</p>
<p>Our main offline database server, hallddb.jlab.org, will have
a short outage on Friday morning, March 22, at 7:30 am. It is
a virtual machine. The number of cores is being increased from
4 to 8. The memory is being expanded from 8 GB to 16 GB. This
will hopefully help performance going forward, especially when
many jobs start at the same time.<br>
</p>
<p>The server should be down for a few minutes.<br>
</p>
<p>Any farm job that <b>starts up</b> at this time and is using
the MySQL interface to access CCDB or RCDB <b>will clearly
encounter problems</b>. If the job has <b>gone past the
point where it needs constants</b> from the database when
7:30 rolls around, it <b>should be ok</b> when the database
server disappears. This has been tested, but not extensively.
My judgment is that we live with a very few (if any) jobs
having a problem rather than asking that all jobs be done
before the upgrade occurs. Clearly if you are nervous about
your jobs, do not run them during this time interval.</p>
<p>We will likely be doing more to enhance database server
performance. This particular upgrade is easy to do, causes
minimal disruption, and should help so we are doing it first.</p>
<p> -- Mark</p>
<p><br>
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<pre class="moz-quote-pre" wrap="">_______________________________________________
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