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<h1 class="entry-title">Apache Kudu (incubating) Weekly Update July 11, 2016</h1>
<p class="meta">Posted 11 Jul 2016 by Jean-Daniel Cryans</p>
</header>
<div class="entry-content">
<p>Welcome to the sixteenth edition of the Kudu Weekly Update. This weekly blog post
covers ongoing development and news in the Apache Kudu (incubating) project.</p>
<!--more-->
<h2 id="development-discussions-and-code-in-progress">Development discussions and code in progress</h2>
<ul>
<li>
<p>Todd Lipcon <a href="https://gerrit.cloudera.org/#/c/3517/">changed the default</a>
bloom filter false positive (FP) ratio from 1% to 0.01%. The original value
wasn’t scientifically chosen, but testing with billions of rows on a 5
node cluster showed a 2x insert throughput improvement at the cost of
some more disk space.</p>
</li>
<li>
<p>J-D Cryans has been fixing some recently introduced bugs in the Java client.
For example, see <a href="https://gerrit.cloudera.org/#/c/3541/">this patch</a> and
<a href="https://gerrit.cloudera.org/#/c/3586/">that one</a>. Testability is a major
concern right now in the Java client since triggering those issues requires
a lot of time and data.</p>
</li>
<li>
<p>Dan Burkert has been making progress on the non-convering range partitioned
tables front. The Java client <a href="https://gerrit.cloudera.org/#/c/3388/">now supports</a>
such tables and Dan is currently implementing new functionality to add and remove
tablets via simple APIs.</p>
</li>
<li>
<p>David Alves is also making a lot of progress on the replay cache, this new component
on the server-side which makes it possible for tablets to identify client write
operations and enable exactly-once semantics. The main patch is up for review
<a href="https://gerrit.cloudera.org/#/c/3449/">here</a>.</p>
</li>
<li>
<p>Adar Dembo is working on addressing multi-master issues, as he explained in this
<a href="http://kudu.apache.org/2016/06/24/multi-master-1-0-0.html">blog post</a>. He just put
up for review patches that enable tablet servers to heartbeat to all masters. Part
one is <a href="https://gerrit.cloudera.org/#/c/3609/">available here</a>.</p>
</li>
<li>
<p>Misty prepared a document with J-D that contains instructions on how to release a
new Kudu version. It is <a href="https://gerrit.cloudera.org/#/c/3614/">up for review here</a>
if you are curious or want to learn more about this process.</p>
</li>
</ul>
<h2 id="project-news">Project news</h2>
<ul>
<li>
<p>The <a href="https://s.apache.org/l6Tw">vote</a> to graduate Kudu from the ASF’s Incubator passed!
The next step is for the ASF Board to vote on the resolution at their next meeting.</p>
</li>
<li>
<p>There’s <a href="http://mail-archives.apache.org/mod_mbox/incubator-kudu-dev/201607.mbox/%3CCAGpTDNesxH43C-Yt5fNwpEpAxfb2P62Xpdi8AqT8jfvjeqnu0w%40mail.gmail.com%3E">a discussion</a>
on the dev mailing list about having an intermediate release, called 0.10.0, before 1.0.0.
The current issue is that the version in the code is current “1.0.0-SNAPSHOT” which doesn’t
leave room for another other release, but the bigger issue is that code is still churning a
lot which doesn’t make for a stable 1.0 release.</p>
</li>
</ul>
<p>Want to learn more about a specific topic from this blog post? Shoot an email to the
<a href="mailto:user@kudu.incubator.apache.org">kudu-user mailing list</a> or
tweet at <a href="https://twitter.com/ApacheKudu">@ApacheKudu</a>. Similarly, if you’re
aware of some Kudu news we missed, let us know so we can cover it in
a future post.</p>
</div>
</article>
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<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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