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<p>Hello Everybody,<br></p>I am happy to announce release 0.19.0 of Hawkular Metrics.This release is anchored by performance enhancements and a lot of REST API enhancements.<br><br><p>Here is a list of major changes:</p>
<ol><li>
<p><strong>REST API - Query Improvements</strong></p>
<ul><li>It is now possible to use relative timestamps when querying for data via <code>`+</code>` or `<code></code>-` added to timestamp parameters. When used, the timestamp is relative to the local system timestamp (<a href="https://issues.jboss.org/browse/HWKMETRICS-358">HWKMETRICS-358</a>, <a href="https://issues.jboss.org/browse/HWKMETRICS-457">HWKMETRICS-457</a>)</li><li>Querying for data from earliest available data point has been expanded to raw data queries for gauges and counters (<a href="https://issues.jboss.org/browse/HWKMETRICS-435">HWKMETRICS-435</a>)</li><li>`<code>DELETE tenants/{id}`</code> has been added to allow the deletion of an entire tenant (<a href="https://issues.jboss.org/browse/HWKMETRICS-446">HWKMETRICS-446</a>)</li><li>AvailabilityType is serialized as simple string in bucket data points (<a href="https://issues.jboss.org/browse/HWKMETRICS-436">HWKMETRICS-436</a>)</li></ul>
</li><li>
<p><strong>Performance Enhancements</strong></p>
<ul><li>The write performance has been increased by 10% across the board after reorganizing the meta-data internal indexes. (<a href="https://issues.jboss.org/browse/HWKMETRICS-422">HWKMETRICS-422</a>)</li><li>GZIP replaced LZ4 as the compression algorithm for the data table.
This produces anywhere between 60% to 70% disk usage savings over LZ4. (<a href="https://issues.jboss.org/browse/HWKMETRICS-454">HWKMETRICS-454</a>)</li></ul>
</li><li>
<p><strong>Job Scheduler - Improvements</strong></p>
<ul><li>The newly introduced internal job scheduler received several
improvements and fixes; the main focus was to enhance the scalability
and fault tolerance.</li><li>The job scheduler will be used only for internal tasks.</li><li>For more details: <a href="https://issues.jboss.org/browse/HWKMETRICS-221">HWKMETRICS-221</a>, <a href="https://issues.jboss.org/browse/HWKMETRICS-451">HWKMETRICS-451</a>, <a href="https://issues.jboss.org/browse/HWKMETRICS-453">HWKMETRICS-453</a>, <a href="https://issues.jboss.org/browse/HWKMETRICS-94">HWKMETRICS-94</a>
</li></ul>
</li></ol>
<p><strong><br></strong></p><p><strong>Hawkular Metrics Clients</strong></p>
<ul><li>Python: <a href="https://github.com/hawkular/hawkular-client-python">https://github.com/hawkular/hawkular-client-python</a>
</li><li>Go: <a href="https://github.com/hawkular/hawkular-client-go">https://github.com/hawkular/hawkular-client-go</a>
</li><li>Ruby: <a href="https://github.com/hawkular/hawkular-client-ruby">https://github.com/hawkular/hawkular-client-ruby</a>
</li><li>Java: <a href="https://github.com/hawkular/hawkular-client-java">https://github.com/hawkular/hawkular-client-java</a>
</li></ul>
<p><strong><br></strong></p><p><strong>Release Links</strong></p><p>Github Release: <a href="https://github.com/hawkular/hawkular-metrics/releases/tag/0.19.0" target="_blank">https://github.com/hawkular/hawkular-metrics/releases/tag/0.19.0</a></p><p>JBoss Nexus Maven artifacts:<br>
<a href="http://origin-repository.jboss.org/nexus/content/repositories/public/org/hawkular/metrics/">http://origin-repository.jboss.org/nexus/content/repositories/public/org/hawkular/metrics/</a></p>
<p>Jira release tracker:<br>
<a href="https://issues.jboss.org/browse/HWKMETRICS/fixforversion/12331192">https://issues.jboss.org/browse/HWKMETRICS/fixforversion/12331192</a></p>
<p><br></p><p>A big "Thank you" goes to John Sanda, Thomas Segismont, Mike
Thompson, Matt Wringe, Michael Burman, Joel Takvorian, and Heiko Rupp for their project
contributions.</p><p><br></p>
</div><div><div><div dir="ltr"><div><div dir="ltr">Thank you,<br>Stefan Negrea<br><br></div></div></div></div></div>
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