2016/11/01/weekly-update.html - kudu-site - Git at Google

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     <h1 class="entry-title">Apache Kudu Weekly Update November 1st, 2016</h1>
     <p class="meta">Posted 01 Nov 2016 by Todd Lipcon</p>
   </header>
   <div class="entry-content">
     <p>Welcome to the twenty-third edition of the Kudu Weekly Update. This weekly blog post
 covers ongoing development and news in the Apache Kudu project.</p>

 <!--more-->

 <h2 id="development-discussions-and-code-in-progress">Development discussions and code in progress</h2>

 <ul>
   <li>
     <p>Dan Burkert committed a piece of test infrastructure
 called “MiniKDC” for both Java and C++. The MiniKDC sets up a short-lived
 Kerberos environment in the context of a single test case, making it
 easy to build tests of security features without requiring any special
 infrastructure on the part of the developer.</p>
   </li>
   <li>
     <p>Todd Lipcon added support for Kerberos (GSSAPI) support to Kudu’s
 RPC system, allowing servers to authenticate the user principal of
 any inbound RPC connection. He also integrated Kudu’s C++ “MiniCluster”
 test infrastructure to allow starting a Kerberized cluster in the
 context of a test.</p>
   </li>
   <li>
     <p>Dan, Todd, and Alexey Serbin have been iterating on a more detailed
 <a href="https://docs.google.com/document/d/1Yu4iuIhaERwug1vS95yWDd_WzrNRIKvvVGUb31y-_mY/edit#">design doc</a>
 for authentication in Kudu. This doc outlines the various non-Kerberos
 methods that Kudu will use for authentication as well as how TLS will
 be used to encrypt and authenticate some types of connections.</p>
   </li>
   <li>
     <p>Part of the above design document involves Kudu servers generating and
 signing X509 certificates on the fly to use for authenticated TLS.
 Alexey has been working on a large <a href="https://gerrit.cloudera.org/#/c/4799/">patch</a>
 which uses OpenSSL to provide key generation and signing functionality.</p>
   </li>
   <li>
     <p>Sailesh Mukil has been working on adding support for
 <a href="https://gerrit.cloudera.org/#/c/4789/">TLS in Kudu’s RPC system</a>. The TLS
 support is a critical part of the overall design for security. This patch
 has gone through several rounds of review and nearing completion.</p>
   </li>
   <li>
     <p>JD Cryans has been continuing to improve the Java client, including adding
 the ability to specify that the client would like to read the “closest”
 replica (e.g. reading from a local copy if possible). Additionally,
 JD has been working on some basic <a href="https://gerrit.cloudera.org/#/c/4781/">tracing support</a>
 within the Java client. This tracing aims to make timeouts easier to understand
 and diagnose.</p>
   </li>
   <li>
     <p>Jordan Birdsell committed 9 more patches to the Python client, bringing it
 very close to feature parity with C++. Jordan has a few more patches in flight
 which should complete this long-running effort.</p>
   </li>
   <li>
     <p>Congrats to new contributor Haijie Hong who committed his first patch this week.
 Haijie added support for <a href="https://gerrit.cloudera.org/#/c/4822/">run-length encoding 64-bit integers</a>.</p>
   </li>
   <li>
     <p>Will Berkeley picked back up work on <a href="https://gerrit.cloudera.org/#/c/4310/">improving the capability of ALTER
 TABLE</a>. His in-flight patch adds support
 for changing the default value of a column as well as changing storage attributes
 such as desired block size, encoding, and compression.</p>
   </li>
   <li>
     <p>Adar Dembo has been working on a series of patches for the Block Manager, the
 component of Kudu which is responsible for laying out blocks on the local
 file system. His patch series consists of a number of refactors to clean up
 and improve the code structure, followed by an <a href="https://gerrit.cloudera.org/#/c/4848/">improvement to reduce file system
 fragmentation</a>.</p>
   </li>
   <li>
     <p>David Alves has been working on a <a href="https://gerrit.cloudera.org/#/c/4819/">patch series</a>
 which adds support for storing ‘REINSERT’ deltas on disk. These records are
 generated if a user inserts a row, deletes it, and inserts a new row with the
 same primary key. Current versions of Kudu lose track of the history of the
 prior version of the row in this scenario, which prevents correct snapshot reads.
 David’s patch series fixes this.</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.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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	<article>
	<header>
	<h1 class="entry-title">Apache Kudu Weekly Update November 1st, 2016</h1>
	<p class="meta">Posted 01 Nov 2016 by Todd Lipcon</p>
	</header>
	<div class="entry-content">
	<p>Welcome to the twenty-third edition of the Kudu Weekly Update. This weekly blog post
	covers ongoing development and news in the Apache Kudu project.</p>

	<!--more-->

	<h2 id="development-discussions-and-code-in-progress">Development discussions and code in progress</h2>

	<ul>
	<li>
	<p>Dan Burkert committed a piece of test infrastructure
	called “MiniKDC” for both Java and C++. The MiniKDC sets up a short-lived
	Kerberos environment in the context of a single test case, making it
	easy to build tests of security features without requiring any special
	infrastructure on the part of the developer.</p>
	</li>
	<li>
	<p>Todd Lipcon added support for Kerberos (GSSAPI) support to Kudu’s
	RPC system, allowing servers to authenticate the user principal of
	any inbound RPC connection. He also integrated Kudu’s C++ “MiniCluster”
	test infrastructure to allow starting a Kerberized cluster in the
	context of a test.</p>
	</li>
	<li>
	<p>Dan, Todd, and Alexey Serbin have been iterating on a more detailed
	<a href="https://docs.google.com/document/d/1Yu4iuIhaERwug1vS95yWDd_WzrNRIKvvVGUb31y-_mY/edit#">design doc</a>
	for authentication in Kudu. This doc outlines the various non-Kerberos
	methods that Kudu will use for authentication as well as how TLS will
	be used to encrypt and authenticate some types of connections.</p>
	</li>
	<li>
	<p>Part of the above design document involves Kudu servers generating and
	signing X509 certificates on the fly to use for authenticated TLS.
	Alexey has been working on a large <a href="https://gerrit.cloudera.org/#/c/4799/">patch</a>
	which uses OpenSSL to provide key generation and signing functionality.</p>
	</li>
	<li>
	<p>Sailesh Mukil has been working on adding support for
	<a href="https://gerrit.cloudera.org/#/c/4789/">TLS in Kudu’s RPC system</a>. The TLS
	support is a critical part of the overall design for security. This patch
	has gone through several rounds of review and nearing completion.</p>
	</li>
	<li>
	<p>JD Cryans has been continuing to improve the Java client, including adding
	the ability to specify that the client would like to read the “closest”
	replica (e.g. reading from a local copy if possible). Additionally,
	JD has been working on some basic <a href="https://gerrit.cloudera.org/#/c/4781/">tracing support</a>
	within the Java client. This tracing aims to make timeouts easier to understand
	and diagnose.</p>
	</li>
	<li>
	<p>Jordan Birdsell committed 9 more patches to the Python client, bringing it
	very close to feature parity with C++. Jordan has a few more patches in flight
	which should complete this long-running effort.</p>
	</li>
	<li>
	<p>Congrats to new contributor Haijie Hong who committed his first patch this week.
	Haijie added support for <a href="https://gerrit.cloudera.org/#/c/4822/">run-length encoding 64-bit integers</a>.</p>
	</li>
	<li>
	<p>Will Berkeley picked back up work on <a href="https://gerrit.cloudera.org/#/c/4310/">improving the capability of ALTER
	TABLE</a>. His in-flight patch adds support
	for changing the default value of a column as well as changing storage attributes
	such as desired block size, encoding, and compression.</p>
	</li>
	<li>
	<p>Adar Dembo has been working on a series of patches for the Block Manager, the
	component of Kudu which is responsible for laying out blocks on the local
	file system. His patch series consists of a number of refactors to clean up
	and improve the code structure, followed by an <a href="https://gerrit.cloudera.org/#/c/4848/">improvement to reduce file system
	fragmentation</a>.</p>
	</li>
	<li>
	<p>David Alves has been working on a <a href="https://gerrit.cloudera.org/#/c/4819/">patch series</a>
	which adds support for storing ‘REINSERT’ deltas on disk. These records are
	generated if a user inserts a row, deletes it, and inserts a new row with the
	same primary key. Current versions of Kudu lose track of the history of the
	prior version of the row in this scenario, which prevents correct snapshot reads.
	David’s patch series fixes this.</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.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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