blob: 4558454a39f9a63c553fcdd3782510ef2302f856 [file] [log] [blame]
<!DOCTYPE html>
<html lang="en">
<meta charset="utf-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<!-- The above 3 meta tags *must* come first in the head; any other head content must come *after* these tags -->
<meta name="description" content="A new open source Apache Hadoop ecosystem project, Apache Kudu completes Hadoop's storage layer to enable fast analytics on fast data" />
<meta name="author" content="Cloudera" />
<title>Apache Kudu - Apache Kudu (incubating) Weekly Update July 11, 2016</title>
<!-- Bootstrap core CSS -->
<link rel="stylesheet" href=""
<!-- Custom styles for this template -->
<link href="/css/kudu.css" rel="stylesheet"/>
<link href="/css/asciidoc.css" rel="stylesheet"/>
<link rel="shortcut icon" href="/img/logo-favicon.ico" />
<link rel="stylesheet" href="" />
<link rel="alternate" type="application/atom+xml"
title="RSS Feed for Apache Kudu blog"
href="/feed.xml" />
<!-- HTML5 shim and Respond.js for IE8 support of HTML5 elements and media queries -->
<!--[if lt IE 9]>
<script src=""></script>
<script src=""></script>
<div class="kudu-site container-fluid">
<!-- Static navbar -->
<nav class="navbar navbar-default">
<div class="container-fluid">
<div class="navbar-header">
<button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<a class="logo" href="/"><img
srcset="// 1x, // 2x"
alt="Apache Kudu"/></a>
<div id="navbar" class="collapse navbar-collapse">
<ul class="nav navbar-nav navbar-right">
<li >
<a href="/">Home</a>
<li >
<a href="/overview.html">Overview</a>
<li >
<a href="/docs/">Documentation</a>
<li >
<a href="/releases/">Releases</a>
<li class="active">
<a href="/blog/">Blog</a>
<!-- NOTE: this dropdown menu does not appear on Mobile, so don't add anything here
that doesn't also appear elsewhere on the site. -->
<li class="dropdown">
<a href="/community.html" role="button" aria-haspopup="true" aria-expanded="false">Community <span class="caret"></span></a>
<ul class="dropdown-menu">
<li class="dropdown-header">GET IN TOUCH</li>
<li><a class="icon email" href="/community.html">Mailing Lists</a></li>
<li><a class="icon slack" href="">Slack Channel</a></li>
<li role="separator" class="divider"></li>
<li><a href="/community.html#meetups-user-groups-and-conference-presentations">Events and Meetups</a></li>
<li><a href="/committers.html">Project Committers</a></li>
<!--<li><a href="/roadmap.html">Roadmap</a></li>-->
<li><a href="/community.html#contributions">How to Contribute</a></li>
<li role="separator" class="divider"></li>
<li class="dropdown-header">DEVELOPER RESOURCES</li>
<li><a class="icon github" href="">GitHub</a></li>
<li><a class="icon gerrit" href="">Gerrit Code Review</a></li>
<li><a class="icon jira" href="">JIRA Issue Tracker</a></li>
<li role="separator" class="divider"></li>
<li class="dropdown-header">SOCIAL MEDIA</li>
<li><a class="icon twitter" href="">Twitter</a></li>
<li><a href="">Reddit</a></li>
<li role="separator" class="divider"></li>
<li class="dropdown-header">APACHE SOFTWARE FOUNDATION</li>
<li><a href="" target="_blank">Security</a></li>
<li><a href="" target="_blank">Sponsorship</a></li>
<li><a href="" target="_blank">Thanks</a></li>
<li><a href="" target="_blank">License</a></li>
<li >
<a href="/faq.html">FAQ</a>
</ul><!-- /.nav -->
</div><!-- /#navbar -->
</div><!-- /.container-fluid -->
<div class="row header">
<div class="col-lg-12">
<h2><a href="/blog">Apache Kudu Blog</a></h2>
<div class="row-fluid">
<div class="col-lg-9">
<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>
<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>
<h2 id="development-discussions-and-code-in-progress">Development discussions and code in progress</h2>
<p>Todd Lipcon <a href="">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>
<p>J-D Cryans has been fixing some recently introduced bugs in the Java client.
For example, see <a href="">this patch</a> and
<a href="">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>
<p>Dan Burkert has been making progress on the non-convering range partitioned
tables front. The Java client <a href="">now supports</a>
such tables and Dan is currently implementing new functionality to add and remove
tablets via simple APIs.</p>
<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="">here</a>.</p>
<p>Adar Dembo is working on addressing multi-master issues, as he explained in this
<a href="">blog post</a>. He just put
up for review patches that enable tablet servers to heartbeat to all masters. Part
one is <a href="">available here</a>.</p>
<p>Misty prepared a document with J-D that contains instructions on how to release a
new Kudu version. It is <a href="">up for review here</a>
if you are curious or want to learn more about this process.</p>
<h2 id="project-news">Project news</h2>
<p>The <a href="">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>
<p>There’s <a href="">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>
<p>Want to learn more about a specific topic from this blog post? Shoot an email to the
<a href="">kudu-user mailing list</a> or
tweet at <a href="">@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 class="col-lg-3 recent-posts">
<h3>Recent posts</h3>
<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>
<li> <a href="/2018/09/11/simplified-pipelines-with-kudu.html">Simplified Data Pipelines with Kudu</a> </li>
<li> <a href="/2018/08/06/getting-started-with-kudu-an-oreilly-title.html">Getting Started with Kudu - an O'Reilly Title</a> </li>
<footer class="footer">
<div class="row">
<div class="col-md-9">
<p class="small">
Copyright &copy; 2019 The Apache Software Foundation.
<p class="small">
Apache Kudu, Kudu, Apache, the Apache feather logo, and the Apache Kudu
project logo are either registered trademarks or trademarks of The
Apache Software Foundation in the United States and other countries.
<div class="col-md-3">
<a class="pull-right" href="">
<img src=""/>
<script src=""></script>
// Try to detect touch-screen devices. Note: Many laptops have touch screens.
$(document).ready(function() {
if ("ontouchstart" in document.documentElement) {
} else {
<script src=""
(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
ga('create', 'UA-68448017-1', 'auto');
ga('send', 'pageview');
<script src=""></script>
anchors.options = {
placement: 'right',
visible: 'touch',