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<h1 class="entry-title">Apache Kudu 1.12.0 released</h1>
<p class="meta">Posted 18 May 2020 by Hao Hao</p>
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<p>The Apache Kudu team is happy to announce the release of Kudu 1.12.0!</p>
<p>The new release adds several new features and improvements, including the
following:</p>
<!--more-->
<ul>
<li>Kudu now supports native fine-grained authorization via integration with
Apache Ranger. Kudu may now enforce access control policies defined for
Kudu tables and columns stored in Ranger. See the
<a href="/releases/1.12.0/docs/security.html#fine_grained_authz">authorization documentation</a>
for more details.</li>
<li>Kudu’s web UI now supports proxying via Apache Knox. Kudu may be deployed
in a firewalled state behind a Knox Gateway which will forward HTTP requests
and responses between clients and the Kudu web UI.</li>
<li>Kudu’s web UI now supports HTTP keep-alive. Operations that access multiple
URLs will now reuse a single HTTP connection, improving their performance.</li>
<li>The <code class="language-plaintext highlighter-rouge">kudu tserver quiesce</code> tool is added to quiesce tablet servers. While a
tablet server is quiescing, it will stop hosting tablet leaders and stop
serving new scan requests. This can be used to orchestrate a rolling restart
without stopping on-going Kudu workloads.</li>
<li>Introduced <code class="language-plaintext highlighter-rouge">auto</code> time source for HybridClock timestamps. With
<code class="language-plaintext highlighter-rouge">--time_source=auto</code> in AWS and GCE cloud environments, Kudu masters and
tablet servers use the built-in NTP client synchronized with dedicated NTP
servers available via host-only networks. With <code class="language-plaintext highlighter-rouge">--time_source=auto</code> in
environments other than AWS/GCE, Kudu masters and tablet servers rely on
their local machine’s clock synchronized by NTP. The default setting for
the HybridClock time source (<code class="language-plaintext highlighter-rouge">--time_source=system</code>) is backward-compatible,
requiring the local machine’s clock to be synchronized by the kernel’s NTP
discipline.</li>
<li>The <code class="language-plaintext highlighter-rouge">kudu cluster rebalance</code> tool now supports moving replicas away from
specific tablet servers by supplying the <code class="language-plaintext highlighter-rouge">--ignored_tservers</code> and
<code class="language-plaintext highlighter-rouge">--move_replicas_from_ignored_tservers</code> arguments (see
<a href="https://issues.apache.org/jira/browse/KUDU-2914">KUDU-2914</a> for more
details).</li>
<li>Write Ahead Log file segments and index chunks are now managed by Kudu’s file
cache. With that, all long-lived file descriptors used by Kudu are managed by
the file cache, and there’s no longer a need for capacity planning of file
descriptor usage.</li>
</ul>
<p>The above is just a list of the highlights, for a more complete list of new
features, improvements and fixes please refer to the <a href="/releases/1.12.0/docs/release_notes.html">release
notes</a>.</p>
<p>The Apache Kudu project only publishes source code releases. To build Kudu
1.12.0, follow these steps:</p>
<ul>
<li>Download the Kudu <a href="/releases/1.12.0">1.12.0 source release</a></li>
<li>Follow the instructions in the documentation to build Kudu <a href="/releases/1.12.0/docs/installation.html#build_from_source">1.12.0 from
source</a></li>
</ul>
<p>For your convenience, binary JAR files for the Kudu Java client library, Spark
DataSource, Flume sink, and other Java integrations are published to the ASF
Maven repository and are <a href="https://search.maven.org/search?q=g:org.apache.kudu%20AND%20v:1.12.0">now
available</a>.</p>
<p>The Python client source is also available on
<a href="https://pypi.org/project/kudu-python/">PyPI</a>.</p>
<p>Additionally, experimental Docker images are published to
<a href="https://hub.docker.com/r/apache/kudu">Docker Hub</a>.</p>
</div>
</article>
</div>
<div class="col-lg-3 recent-posts">
<h3>Recent posts</h3>
<ul>
<li> <a href="/2021/06/22/apache-kudu-1-15-0-released.html">Apache Kudu 1.15.0 Released</a> </li>
<li> <a href="/2021/01/28/apache-kudu-1-14-0-release.html">Apache Kudu 1.14.0 Released</a> </li>
<li> <a href="/2021/01/15/bloom-filter-predicate.html">Optimized joins & filtering with Bloom filter predicate in Kudu</a> </li>
<li> <a href="/2020/09/21/apache-kudu-1-13-0-release.html">Apache Kudu 1.13.0 released</a> </li>
<li> <a href="/2020/08/11/fine-grained-authz-ranger.html">Fine-Grained Authorization with Apache Kudu and Apache Ranger</a> </li>
<li> <a href="/2020/07/30/building-near-real-time-big-data-lake.html">Building Near Real-time Big Data Lake</a> </li>
<li> <a href="/2020/05/18/apache-kudu-1-12-0-release.html">Apache Kudu 1.12.0 released</a> </li>
<li> <a href="/2019/11/20/apache-kudu-1-11-1-release.html">Apache Kudu 1.11.1 released</a> </li>
<li> <a href="/2019/11/20/apache-kudu-1-10-1-release.html">Apache Kudu 1.10.1 released</a> </li>
<li> <a href="/2019/07/09/apache-kudu-1-10-0-release.html">Apache Kudu 1.10.0 Released</a> </li>
<li> <a href="/2019/04/30/location-awareness.html">Location Awareness in Kudu</a> </li>
<li> <a href="/2019/04/22/fine-grained-authorization-with-apache-kudu-and-impala.html">Fine-Grained Authorization with Apache Kudu and Impala</a> </li>
<li> <a href="/2019/03/19/testing-apache-kudu-applications-on-the-jvm.html">Testing Apache Kudu Applications on the JVM</a> </li>
<li> <a href="/2019/03/15/apache-kudu-1-9-0-release.html">Apache Kudu 1.9.0 Released</a> </li>
<li> <a href="/2019/03/05/transparent-hierarchical-storage-management-with-apache-kudu-and-impala.html">Transparent Hierarchical Storage Management with Apache Kudu and Impala</a> </li>
</ul>
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