2018/03/23/apache-kudu-1-7-0-released.html - kudu-site - Git at Google

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     <h1 class="entry-title">Apache Kudu 1.7.0 released</h1>
     <p class="meta">Posted 23 Mar 2018 by Grant Henke</p>
   </header>
   <div class="entry-content">
     <p>The Apache Kudu team is happy to announce the release of Kudu 1.7.0!</p>

 <p>Apache Kudu 1.7.0 is a minor release that offers new features, performance
 optimizations, incremental improvements, and bug fixes.</p>

 <p>Release highlights:</p>

 <!--more-->

 <ol>
   <li>Kudu now supports the decimal column type. The decimal type is a numeric
 data type with fixed scale and precision suitable for financial and other
 arithmetic calculations where the imprecise representation and rounding
 behavior of float and double make those types impractical. The decimal type
 is also useful for integers larger than int64 and cases with fractional values
 in a primary key. See <a href="/releases/1.7.0/docs/schema_design.html#decimal">Decimal Type</a>
 for more details.</li>
   <li>The strategy Kudu uses for automatically healing tablets which have lost a
 replica due to server or disk failures has been improved. The new re-replication
 strategy, or replica management scheme, first adds a replacement tablet replica
 before evicting the failed one.</li>
   <li>A new scan read mode READ_YOUR_WRITES. Users can specify READ_YOUR_WRITES when
 creating a new scanner in C++, Java and Python clients. If this mode is used,
 the client will perform a read such that it follows all previously known writes
 and reads from this client. Reads in this mode ensure read-your-writes and
 read-your-reads session guarantees, while minimizing latency caused by waiting
 for outstanding write transactions to complete. Note that this is still an
 experimental feature which may be stabilized in future releases.</li>
   <li>The tablet server web UI scans dashboard (/scans) has been improved with several
 new features, including: showing the most recently completed scans, a pseudo-SQL
 scan descriptor that concisely shows the selected columns and applied predicates,
 and more complete and better documented scan statistics.</li>
   <li>Kudu daemons now expose a web page /stacks which dumps the current stack trace of
 every thread running in the server. This information can be helpful when diagnosing
 performance issues.</li>
   <li>By default, each tablet replica will now stripe data blocks across 3 data directories
 instead of all data directories. This decreases the likelihood that any given tablet
 will be affected in the event of a single disk failure.</li>
   <li>The Java client now uses a predefined prioritized list of TLS ciphers when
 establishing an encrypted connection to Kudu servers. This cipher list matches the
 list of ciphers preferred for server-to-server communication and ensures that the
 most efficient and secure ciphers are preferred. When the Kudu client is running on
 Java 8 or newer, this provides a substantial speed-up to read and write performance.</li>
   <li>The performance of inserting rows containing many string or binary columns has been
 improved, especially in the case of highly concurrent write workloads.</li>
   <li>The Java client will now automatically attempt to re-acquire Kerberos credentials
 from the ticket cache when the prior credentials are about to expire. This allows
 client instances to persist longer than the expiration time of a single Kerberos
 ticket so long as some other process renews the credentials in the ticket cache.</li>
 </ol>

 <p>For more details, and the complete list of changes in Kudu 1.7.0, please see
 the <a href="/releases/1.7.0/docs/release_notes.html">Kudu 1.7.0 release notes</a>.</p>

 <p>The Apache Kudu project only publishes source code releases. To build Kudu
 1.7.0, follow these steps:</p>

 <ol>
   <li>Download the <a href="/releases/1.7.0/">Kudu 1.7.0 source release</a>.</li>
   <li>Follow the instructions in the documentation to
 <a href="/releases/1.7.0/docs/installation.html#build_from_source">build Kudu 1.7.0 from source</a>.</li>
 </ol>

 <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%7Cga%7C1%7Cg%3A%22org.apache.kudu%22%20AND%20v%3A%221.7.0%22">now available</a>.</p>


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     <ul>

       <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>

       <li> <a href="/2018/12/11/call-for-posts.html">Call for Posts</a> </li>

       <li> <a href="/2018/10/26/apache-kudu-1-8-0-released.html">Apache Kudu 1.8.0 Released</a> </li>

       <li> <a href="/2018/09/26/index-skip-scan-optimization-in-kudu.html">Index Skip Scan Optimization in Kudu</a> </li>

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	<header>
	<h1 class="entry-title">Apache Kudu 1.7.0 released</h1>
	<p class="meta">Posted 23 Mar 2018 by Grant Henke</p>
	</header>
	<div class="entry-content">
	<p>The Apache Kudu team is happy to announce the release of Kudu 1.7.0!</p>

	<p>Apache Kudu 1.7.0 is a minor release that offers new features, performance
	optimizations, incremental improvements, and bug fixes.</p>

	<p>Release highlights:</p>

	<!--more-->

	<ol>
	<li>Kudu now supports the decimal column type. The decimal type is a numeric
	data type with fixed scale and precision suitable for financial and other
	arithmetic calculations where the imprecise representation and rounding
	behavior of float and double make those types impractical. The decimal type
	is also useful for integers larger than int64 and cases with fractional values
	in a primary key. See <a href="/releases/1.7.0/docs/schema_design.html#decimal">Decimal Type</a>
	for more details.</li>
	<li>The strategy Kudu uses for automatically healing tablets which have lost a
	replica due to server or disk failures has been improved. The new re-replication
	strategy, or replica management scheme, first adds a replacement tablet replica
	before evicting the failed one.</li>
	<li>A new scan read mode READ_YOUR_WRITES. Users can specify READ_YOUR_WRITES when
	creating a new scanner in C++, Java and Python clients. If this mode is used,
	the client will perform a read such that it follows all previously known writes
	and reads from this client. Reads in this mode ensure read-your-writes and
	read-your-reads session guarantees, while minimizing latency caused by waiting
	for outstanding write transactions to complete. Note that this is still an
	experimental feature which may be stabilized in future releases.</li>
	<li>The tablet server web UI scans dashboard (/scans) has been improved with several
	new features, including: showing the most recently completed scans, a pseudo-SQL
	scan descriptor that concisely shows the selected columns and applied predicates,
	and more complete and better documented scan statistics.</li>
	<li>Kudu daemons now expose a web page /stacks which dumps the current stack trace of
	every thread running in the server. This information can be helpful when diagnosing
	performance issues.</li>
	<li>By default, each tablet replica will now stripe data blocks across 3 data directories
	instead of all data directories. This decreases the likelihood that any given tablet
	will be affected in the event of a single disk failure.</li>
	<li>The Java client now uses a predefined prioritized list of TLS ciphers when
	establishing an encrypted connection to Kudu servers. This cipher list matches the
	list of ciphers preferred for server-to-server communication and ensures that the
	most efficient and secure ciphers are preferred. When the Kudu client is running on
	Java 8 or newer, this provides a substantial speed-up to read and write performance.</li>
	<li>The performance of inserting rows containing many string or binary columns has been
	improved, especially in the case of highly concurrent write workloads.</li>
	<li>The Java client will now automatically attempt to re-acquire Kerberos credentials
	from the ticket cache when the prior credentials are about to expire. This allows
	client instances to persist longer than the expiration time of a single Kerberos
	ticket so long as some other process renews the credentials in the ticket cache.</li>
	</ol>

	<p>For more details, and the complete list of changes in Kudu 1.7.0, please see
	the <a href="/releases/1.7.0/docs/release_notes.html">Kudu 1.7.0 release notes</a>.</p>

	<p>The Apache Kudu project only publishes source code releases. To build Kudu
	1.7.0, follow these steps:</p>

	<ol>
	<li>Download the <a href="/releases/1.7.0/">Kudu 1.7.0 source release</a>.</li>
	<li>Follow the instructions in the documentation to
	<a href="/releases/1.7.0/docs/installation.html#build_from_source">build Kudu 1.7.0 from source</a>.</li>
	</ol>

	<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%7Cga%7C1%7Cg%3A%22org.apache.kudu%22%20AND%20v%3A%221.7.0%22">now available</a>.</p>


	</div>
	</article>


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	<div class="col-lg-3 recent-posts">
	<h3>Recent posts</h3>
	<ul>

	<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>

	<li> <a href="/2018/12/11/call-for-posts.html">Call for Posts</a> </li>

	<li> <a href="/2018/10/26/apache-kudu-1-8-0-released.html">Apache Kudu 1.8.0 Released</a> </li>

	<li> <a href="/2018/09/26/index-skip-scan-optimization-in-kudu.html">Index Skip Scan Optimization in Kudu</a> </li>

	</ul>
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