2016/07/18/weekly-update.html - kudu-site - Git at Google

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     <h1 class="entry-title">Apache Kudu (incubating) Weekly Update July 18, 2016</h1>
     <p class="meta">Posted 18 Jul 2016 by Todd Lipcon</p>
   </header>
   <div class="entry-content">
     <p>Welcome to the seventeenth 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>Dan Burkert has continued making progress on support for non-covering range partitioned
 tables. This past week, he posted a code review for
 <a href="https://gerrit.cloudera.org/#/c/3648/">adding and dropping range partitions to the master</a>
 and another for <a href="https://gerrit.cloudera.org/#/c/3581/">handling non-covering ranges in the C++ client</a>.</p>
   </li>
   <li>
     <p>Adar Dembo continued 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>. This past week
 he worked on <a href="https://gerrit.cloudera.org/#/c/3550/">tackling various race conditions</a>
 that were possible when master operations were submitted concurrent with a master leader election.</p>

     <p>Adar also posted patches for most of the remaining known server-side issues, including
 posting a comprehensive <a href="https://gerrit.cloudera.org/#/c/3611/">stress test</a> which issues
 client DDL operations concurrent with triggering master crashes and associated failovers.</p>

     <p>As always, Adar’s commit messages are instructive and fun reads for those interested in
 following along.</p>
   </li>
   <li>As mentioned last week, David Alves has been making a lot of progress on the implementation
 of the replay cache. Many patches landed in master this week, including:
     <ul>
       <li><a href="https://gerrit.cloudera.org/#/c/3192/">RPC system integration</a></li>
       <li><a href="https://gerrit.cloudera.org/#/c/3449/">Integration with replicated writes</a></li>
       <li><a href="https://gerrit.cloudera.org/#/c/3519/">Correctness/stress tests</a></li>
     </ul>

     <p>Currently, this new feature is disabled by default, as the support for evicting elements
 from the cache is not yet complete. This last missing feature is now
 <a href="https://gerrit.cloudera.org/#/c/3628/">up for review</a>.</p>
   </li>
   <li>Alexey Serbin has been working on adding Doxygen-based documentation for the public
 C++ API. This was originally <a href="https://mail-archives.apache.org/mod_mbox/incubator-kudu-dev/201606.mbox/%3CCANbMB4wtMz=JKwgKMNPvkjWX3t9NxCeGt04NmL=SyESyzUMWJg@mail.gmail.com%3E">proposed on the mailing list</a>
  a couple of weeks ago, and last week, Alexey posted the
  <a href="https://gerrit.cloudera.org/#/c/3619/">initial draft of the implementation</a>.</li>
 </ul>

 <h2 id="project-news">Project news</h2>

 <ul>
   <li>The <a href="http://mail-archives.apache.org/mod_mbox/incubator-kudu-dev/201607.mbox/%3CCAGpTDNesxH43C-Yt5fNwpEpAxfb2P62Xpdi8AqT8jfvjeqnu0w%40mail.gmail.com%3E">discussion</a>
 on the dev mailing list about having an intermediate release, called 0.10.0, before 1.0.0,
 has wound down. The consensus seems to be that the development team is in favor of this
 release. Accordingly, the version number in the master branch has been changed back to
 0.10.0-SNAPSHOT.</li>
 </ul>

 <p>Want to learn more about a specific topic from this blog post? Shoot an email to the
 <a href="&#109;&#097;&#105;&#108;&#116;&#111;:&#117;&#115;&#101;&#114;&#064;&#107;&#117;&#100;&#117;&#046;&#105;&#110;&#099;&#117;&#098;&#097;&#116;&#111;&#114;&#046;&#097;&#112;&#097;&#099;&#104;&#101;&#046;&#111;&#114;&#103;">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>

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	<article>
	<header>
	<h1 class="entry-title">Apache Kudu (incubating) Weekly Update July 18, 2016</h1>
	<p class="meta">Posted 18 Jul 2016 by Todd Lipcon</p>
	</header>
	<div class="entry-content">
	<p>Welcome to the seventeenth 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>Dan Burkert has continued making progress on support for non-covering range partitioned
	tables. This past week, he posted a code review for
	<a href="https://gerrit.cloudera.org/#/c/3648/">adding and dropping range partitions to the master</a>
	and another for <a href="https://gerrit.cloudera.org/#/c/3581/">handling non-covering ranges in the C++ client</a>.</p>
	</li>
	<li>
	<p>Adar Dembo continued 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>. This past week
	he worked on <a href="https://gerrit.cloudera.org/#/c/3550/">tackling various race conditions</a>
	that were possible when master operations were submitted concurrent with a master leader election.</p>

	<p>Adar also posted patches for most of the remaining known server-side issues, including
	posting a comprehensive <a href="https://gerrit.cloudera.org/#/c/3611/">stress test</a> which issues
	client DDL operations concurrent with triggering master crashes and associated failovers.</p>

	<p>As always, Adar’s commit messages are instructive and fun reads for those interested in
	following along.</p>
	</li>
	<li>As mentioned last week, David Alves has been making a lot of progress on the implementation
	of the replay cache. Many patches landed in master this week, including:
	<ul>
	<li><a href="https://gerrit.cloudera.org/#/c/3192/">RPC system integration</a></li>
	<li><a href="https://gerrit.cloudera.org/#/c/3449/">Integration with replicated writes</a></li>
	<li><a href="https://gerrit.cloudera.org/#/c/3519/">Correctness/stress tests</a></li>
	</ul>

	<p>Currently, this new feature is disabled by default, as the support for evicting elements
	from the cache is not yet complete. This last missing feature is now
	<a href="https://gerrit.cloudera.org/#/c/3628/">up for review</a>.</p>
	</li>
	<li>Alexey Serbin has been working on adding Doxygen-based documentation for the public
	C++ API. This was originally <a href="https://mail-archives.apache.org/mod_mbox/incubator-kudu-dev/201606.mbox/%3CCANbMB4wtMz=JKwgKMNPvkjWX3t9NxCeGt04NmL=SyESyzUMWJg@mail.gmail.com%3E">proposed on the mailing list</a>
	a couple of weeks ago, and last week, Alexey posted the
	<a href="https://gerrit.cloudera.org/#/c/3619/">initial draft of the implementation</a>.</li>
	</ul>

	<h2 id="project-news">Project news</h2>

	<ul>
	<li>The <a href="http://mail-archives.apache.org/mod_mbox/incubator-kudu-dev/201607.mbox/%3CCAGpTDNesxH43C-Yt5fNwpEpAxfb2P62Xpdi8AqT8jfvjeqnu0w%40mail.gmail.com%3E">discussion</a>
	on the dev mailing list about having an intermediate release, called 0.10.0, before 1.0.0,
	has wound down. The consensus seems to be that the development team is in favor of this
	release. Accordingly, the version number in the master branch has been changed back to
	0.10.0-SNAPSHOT.</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>

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