Author: lidong
Date: Mon Jan 21 04:20:52 2019
New Revision: 1851725
URL: http://svn.apache.org/viewvc?rev=1851725&view=rev
Log:
minor format in 2.6.0 announcement
Added:
kylin/site/blog/2019/01/18/
kylin/site/blog/2019/01/18/release-v2.6.0/
kylin/site/blog/2019/01/18/release-v2.6.0/index.html
kylin/site/cn/blog/2019/
kylin/site/cn/blog/2019/01/
kylin/site/cn/blog/2019/01/18/
kylin/site/cn/blog/2019/01/18/release-v2.6.0/
kylin/site/cn/blog/2019/01/18/release-v2.6.0/index.html
Modified:
kylin/site/blog/index.html
kylin/site/feed.xml
Added: kylin/site/blog/2019/01/18/release-v2.6.0/index.html
URL:
http://svn.apache.org/viewvc/kylin/site/blog/2019/01/18/release-v2.6.0/index.html?rev=1851725&view=auto
==============================================================================
--- kylin/site/blog/2019/01/18/release-v2.6.0/index.html (added)
+++ kylin/site/blog/2019/01/18/release-v2.6.0/index.html Mon Jan 21 04:20:52
2019
@@ -0,0 +1,6192 @@
+<!--
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+ </div>
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+ <div>
+ <article class="post-content" >
+ <!--
+* Licensed to the Apache Software Foundation (ASF) under one
+* or more contributor license agreements. See the NOTICE file
+* distributed with this work for additional information
+* regarding copyright ownership. The ASF licenses this file
+* to you under the Apache License, Version 2.0 (the
+* "License"); you may not use this file except in compliance
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+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
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+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+-->
+
+<div class="post" style=" padding:2em 4em 4em 4em">
+
+ <header class="post-header">
+ <h1 class="post-title">Apache Kylin v2.6.0 Release Announcement</h1>
+ <p class="post-meta" >Jan 18, 2019 ⢠Yanghong Zhong</p>
+ </header>
+
+ <article class="post-content" >
+ <p>The Apache Kylin community is pleased to announce the release of Apache
Kylin v2.6.0.</p>
+
+<p>Apache Kylin is an open source Distributed Analytics Engine designed to
provide SQL interface and multi-dimensional analysis (OLAP) on Big Data
supporting extremely large datasets.</p>
+
+<p>This is a major release after 2.5.0, including many enhancements. All of
the changes can be found in the <a
href="https://kylin.apache.org/docs/release_notes.html";>release notes</a>. Here
just highlight the major ones:</p>
+
+<h3 id="sdk-for-jdbc-sources">SDK for JDBC sources</h3>
+<p>Apache Kylin has already supported several data sources like Amazon
Redshift, SQL Server through JDBC. <br />
+To help developers handle SQL dialect differences and easily implement a new
data source through JDBC, Kylin provides a new data source SDK with APIs
for:<br />
+* Synchronize metadata and data from JDBC source<br />
+* Build cube from JDBC source<br />
+* Query pushdown to JDBC source engine when cube is unmatched</p>
+
+<p>Check KYLIN-3552 for more.</p>
+
+<h3 id="memcached-as-distributed-cache">Memcached as distributed cache</h3>
+<p>In the past, query caches are not efficiently used in Kylin due to two
aspects: aggressive cache expiration strategy and local cache. <br />
+Because of the aggressive cache expiration strategy, useful caches are often
cleaned up unnecessarily. <br />
+Because query caches are stored in local servers, they cannot be shared
between servers. <br />
+And because of the size limitation of local cache, not all useful query
results can be cached.</p>
+
+<p>To deal with these shortcomings, we change the query cache expiration
strategy by signature checking and introduce the memcached as Kylinâs
distributed cache so that Kylin servers are able to share cache between
servers. <br />
+And itâs easy to add memcached servers to scale out distributed cache. With
enough memcached servers, we can cached things as much as possible. <br />
+Then we also introduce segment level query cache which can not only speed up
query but also reduce the rpcs to HBase. <br />
+The related tasks are KYLIN-2895, KYLIN-2894, KYLIN-2896, KYLIN-2897,
KYLIN-2898, KYLIN-2899.</p>
+
+<h3 id="forkjoinpool-for-fast-cubing">ForkJoinPool for fast cubing</h3>
+<p>In the past, fast cubing uses split threads, task threads and main thread
to do the cube building, there is complex join and error handling logic.</p>
+
+<p>The new implement leverages the ForkJoinPool from JDK, the event split
logic is handled in<br />
+main thread. Cuboid task and sub-tasks are handled in fork join pool, cube
results are collected<br />
+async and can be write to output earlier. Check KYLIN-2932 for more.</p>
+
+<h3 id="improve-hllcounter-performance">Improve HLLCounter performance</h3>
+<p>In the past, the way to create HLLCounter and to compute harmonic mean are
not efficient.</p>
+
+<p>The new implement improve the HLLCounter creation by copy register from
another HLLCounter instead of merge. To compute harmonic mean in the
HLLCSnapshot, it does the enhancement by <br />
+* using table to cache all 1/2^r without computing on the fly<br />
+* remove floating addition by using integer addition in the bigger loop<br />
+* remove branch, e.g. neednât checking whether registers[i] is zero or not,
although this is minor improvement.</p>
+
+<p>Check KYLIN-3656 for more.</p>
+
+<h3 id="improve-cuboid-recommendation-algorithm">Improve Cuboid Recommendation
Algorithm</h3>
+<p>In the past, to add cuboids which are not prebuilt, the cube planner turns
to mandatory cuboids which are selected if its rollup row count is above some
threshold. <br />
+There are two shortcomings:<br />
+* The way to estimate the rollup row count is not good<br />
+* Itâs hard to determine the threshold of rollup row count for recommending
mandatory cuboids</p>
+
+<p>The new implement improves the way to estimate the row count of un-prebuilt
cuboids by rollup ratio rather than exact rollup row count. <br />
+With better estimated row counts for un-prebuilt cuboids, the cost-based cube
planner algorithm will decide which cuboid to be built or not and the threshold
for previous mandatory cuboids is not needed. <br />
+By this improvement, we donât need the threshold for mandatory cuboids
recommendation, and mandatory cuboids can only be manually set and will not be
recommended. Check KYLIN-3540 for more.</p>
+
+<p><strong>Download</strong></p>
+
+<p>To download Apache Kylin v2.6.0 source code or binary package, visit the <a
href="http://kylin.apache.org/download";>download</a> page.</p>
+
+<p><strong>Upgrade</strong></p>
+
+<p>Follow the <a href="/docs/howto/howto_upgrade.html">upgrade guide</a>.</p>
+
+<p><strong>Feedback</strong></p>
+
+<p>If you face issue or question, please send mail to Apache Kylin dev or user
mailing list:Â [email protected] , [email protected]; Before sending,
please make sure you have subscribed the mailing list by dropping an email to
[email protected] or [email protected].</p>
+
+<p><em>Great thanks to everyone who contributed!</em></p>
+
+ </article>
+
+</div>
+
+
+
+
+
+ </article>
+ </div>
+ </div>
+ <!--
+* Licensed to the Apache Software Foundation (ASF) under one
+* or more contributor license agreements. See the NOTICE file
+* distributed with this work for additional information
+* regarding copyright ownership. The ASF licenses this file
+* to you under the Apache License, Version 2.0 (the
+* "License"); you may not use this file except in compliance
+* with the License. You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+-->
+
+<footer id="underfooter">
+ <div>
+ <div class="row">
+ <div class="col-md-12 widget">
+ <div class="widget-body">
+ <div class="footer-img">
+ <a href="http://www.apache.org";>
+ <img id="asf-logo" height="78px" alt="Apache
Software Foundation" src="/assets/images/apache_footer.png">
+ </a>
+ </div>
+ <p style="padding-top: 11px;">
+ The contents of this website are © 2015 Apache
Software Foundation under the terms of the
+ <a href="http://www.apache.org/licenses/LICENSE-2.0";>
Apache License v2 </a>.
+ </p>
+ <p style="margin-bottom: 11px;">
+ Apache Kylin and its logo are trademarks of the Apache
Software Foundation.
+ </div>
+
+ </div>
+ </div>
+ </div>
+ <!-- /row of widgets -->
+
+ </div>
+ <div></div>
+
+</footer>
+
+ <script src="/assets/js/jquery-1.9.1.min.js"></script>
+ <script src="/assets/js/bootstrap.min.js"></script>
+ <script src="/assets/js/main.js"></script>
+ </body>
+</html>
+
+
+
+
Modified: kylin/site/blog/index.html
URL:
http://svn.apache.org/viewvc/kylin/site/blog/index.html?rev=1851725&r1=1851724&r2=1851725&view=diff
==============================================================================
--- kylin/site/blog/index.html (original)
+++ kylin/site/blog/index.html Mon Jan 21 04:20:52 2019
@@ -6037,6 +6037,26 @@ var _hmt = _hmt || [];
<div class="col-md-6 col-lg-6 col-xs-12">
+ <a class="blog-card" href="/blog/2019/01/18/release-v2.6.0/">
+ <div class="blog-pic">
+ <img width="20" src="../assets/images/icon_blog_w.png" />
+ </div>
+ <p class="blog-title">Apache Kylin v2.6.0 Release
Announcement</p>
+ <p align="left" class="post-meta">posted: Jan 18, 2019</p>
+ </a>
+ </div>
+
+ <div class="col-md-6 col-lg-6 col-xs-12">
+ <a class="blog-card" href="/cn/blog/2019/01/18/release-v2.6.0/">
+ <div class="blog-pic">
+ <img width="20" src="../assets/images/icon_blog_w.png" />
+ </div>
+ <p class="blog-title">Apache Kylin v2.6.0 æ£å¼åå¸</p>
+ <p align="left" class="post-meta">posted: Jan 18, 2019</p>
+ </a>
+ </div>
+
+ <div class="col-md-6 col-lg-6 col-xs-12">
<a class="blog-card"
href="/blog/2019/01/17/cisco-throughput-5x/">
<div class="blog-pic">
<img width="20" src="../assets/images/icon_blog_w.png" />
@@ -6317,21 +6337,21 @@ var _hmt = _hmt || [];
</div>
<div class="col-md-6 col-lg-6 col-xs-12">
- <a class="blog-card" href="/cn/blog/2016/04/12/release-v1.5.1/">
+ <a class="blog-card" href="/blog/2016/04/12/release-v1.5.1/">
<div class="blog-pic">
<img width="20" src="../assets/images/icon_blog_w.png" />
</div>
- <p class="blog-title">Apache Kylin v1.5.1 æ£å¼åå¸</p>
+ <p class="blog-title">Apache Kylin v1.5.1 Release
Announcement</p>
<p align="left" class="post-meta">posted: Apr 12, 2016</p>
</a>
</div>
<div class="col-md-6 col-lg-6 col-xs-12">
- <a class="blog-card" href="/blog/2016/04/12/release-v1.5.1/">
+ <a class="blog-card" href="/cn/blog/2016/04/12/release-v1.5.1/">
<div class="blog-pic">
<img width="20" src="../assets/images/icon_blog_w.png" />
</div>
- <p class="blog-title">Apache Kylin v1.5.1 Release
Announcement</p>
+ <p class="blog-title">Apache Kylin v1.5.1 æ£å¼åå¸</p>
<p align="left" class="post-meta">posted: Apr 12, 2016</p>
</a>
</div>
@@ -6367,21 +6387,21 @@ var _hmt = _hmt || [];
</div>
<div class="col-md-6 col-lg-6 col-xs-12">
- <a class="blog-card" href="/blog/2016/03/16/release-v1.3.0/">
+ <a class="blog-card" href="/cn/blog/2016/03/16/release-v1.3.0/">
<div class="blog-pic">
<img width="20" src="../assets/images/icon_blog_w.png" />
</div>
- <p class="blog-title">Apache Kylin v1.3.0 Release
Announcement</p>
+ <p class="blog-title">Apache Kylin v1.3.0 æ£å¼åå¸</p>
<p align="left" class="post-meta">posted: Mar 16, 2016</p>
</a>
</div>
<div class="col-md-6 col-lg-6 col-xs-12">
- <a class="blog-card" href="/cn/blog/2016/03/16/release-v1.3.0/">
+ <a class="blog-card" href="/blog/2016/03/16/release-v1.3.0/">
<div class="blog-pic">
<img width="20" src="../assets/images/icon_blog_w.png" />
</div>
- <p class="blog-title">Apache Kylin v1.3.0 æ£å¼åå¸</p>
+ <p class="blog-title">Apache Kylin v1.3.0 Release
Announcement</p>
<p align="left" class="post-meta">posted: Mar 16, 2016</p>
</a>
</div>
@@ -6427,41 +6447,41 @@ var _hmt = _hmt || [];
</div>
<div class="col-md-6 col-lg-6 col-xs-12">
- <a class="blog-card" href="/blog/2015/12/23/release-v1.2/">
+ <a class="blog-card" href="/cn/blog/2015/12/23/release-v1.2/">
<div class="blog-pic">
<img width="20" src="../assets/images/icon_blog_w.png" />
</div>
- <p class="blog-title">Apache Kylin v1.2 Release
Announcement</p>
+ <p class="blog-title">Apache Kylin v1.2 æ£å¼åå¸</p>
<p align="left" class="post-meta">posted: Dec 23, 2015</p>
</a>
</div>
<div class="col-md-6 col-lg-6 col-xs-12">
- <a class="blog-card" href="/cn/blog/2015/12/23/release-v1.2/">
+ <a class="blog-card" href="/blog/2015/12/23/release-v1.2/">
<div class="blog-pic">
<img width="20" src="../assets/images/icon_blog_w.png" />
</div>
- <p class="blog-title">Apache Kylin v1.2 æ£å¼åå¸</p>
+ <p class="blog-title">Apache Kylin v1.2 Release
Announcement</p>
<p align="left" class="post-meta">posted: Dec 23, 2015</p>
</a>
</div>
<div class="col-md-6 col-lg-6 col-xs-12">
- <a class="blog-card"
href="/blog/2015/10/25/release-v1.1-incubating/">
+ <a class="blog-card"
href="/cn/blog/2015/10/25/release-v1.1-incubating/">
<div class="blog-pic">
<img width="20" src="../assets/images/icon_blog_w.png" />
</div>
- <p class="blog-title">Apache Kylin v1.1 (incubating) Release
Announcement</p>
+ <p class="blog-title">Apache Kylin v1.1 (incubating)
æ£å¼åå¸</p>
<p align="left" class="post-meta">posted: Oct 25, 2015</p>
</a>
</div>
<div class="col-md-6 col-lg-6 col-xs-12">
- <a class="blog-card"
href="/cn/blog/2015/10/25/release-v1.1-incubating/">
+ <a class="blog-card"
href="/blog/2015/10/25/release-v1.1-incubating/">
<div class="blog-pic">
<img width="20" src="../assets/images/icon_blog_w.png" />
</div>
- <p class="blog-title">Apache Kylin v1.1 (incubating)
æ£å¼åå¸</p>
+ <p class="blog-title">Apache Kylin v1.1 (incubating) Release
Announcement</p>
<p align="left" class="post-meta">posted: Oct 25, 2015</p>
</a>
</div>
![https://www.apache.org/images/SupportApache-small.png"](https://www.apache.org/images/SupportApache-small.png"){kind=link}