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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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<blockquote type="cite"
cite="mid:5eb7b6f4-40a4-9611-cc41-f0da66b0c388@jlab.org">
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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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