You are viewing a plain text version of this content. The canonical link for it is here.
Posted to commits@cassandra.apache.org by er...@apache.org on 2022/02/23 00:20:44 UTC
[cassandra-website] branch trunk updated: CASSANDRA-17398 February 2022 blog "Apache Cassandra and Java SE 11 support"
This is an automated email from the ASF dual-hosted git repository.
erickramirezau pushed a commit to branch trunk
in repository https://gitbox.apache.org/repos/asf/cassandra-website.git
The following commit(s) were added to refs/heads/trunk by this push:
new 123b47c CASSANDRA-17398 February 2022 blog "Apache Cassandra and Java SE 11 support"
123b47c is described below
commit 123b47c3a13402ee562eb0111defd74883369b25
Author: Diogenese Topper <di...@gmail.com>
AuthorDate: Tue Feb 22 13:15:32 2022 -0800
CASSANDRA-17398 February 2022 blog "Apache Cassandra and Java SE 11 support"
patch by Chris Thornett, Diogenese Topper; reviewed by Erick Ramirez for CASSANDRA-17398
---
...java-se-11-support-unsplash-michiel-leunens.jpg | Bin 0 -> 116492 bytes
site-content/source/modules/ROOT/pages/blog.adoc | 26 ++++++++++++++
.../Apache-Cassandra-and-Java-SE-11-support.adoc | 39 +++++++++++++++++++++
3 files changed, 65 insertions(+)
diff --git a/site-content/source/modules/ROOT/images/blog/apache-cassandra-and-java-se-11-support-unsplash-michiel-leunens.jpg b/site-content/source/modules/ROOT/images/blog/apache-cassandra-and-java-se-11-support-unsplash-michiel-leunens.jpg
new file mode 100644
index 0000000..e389629
Binary files /dev/null and b/site-content/source/modules/ROOT/images/blog/apache-cassandra-and-java-se-11-support-unsplash-michiel-leunens.jpg differ
diff --git a/site-content/source/modules/ROOT/pages/blog.adoc b/site-content/source/modules/ROOT/pages/blog.adoc
index 14e51cd..9aa11e9 100644
--- a/site-content/source/modules/ROOT/pages/blog.adoc
+++ b/site-content/source/modules/ROOT/pages/blog.adoc
@@ -14,6 +14,32 @@ NOTES FOR CONTENT CREATORS
[openblock,card-header]
------
[discrete]
+=== Java SE 11 LTS and Apache Cassandra
+[discrete]
+==== February 24, 2022
+------
+[openblock,card-content]
+------
+With the release of version 4.0.2, Cassandra's support
+for Java 11 will no longer be experimental and offers a number of features including better performance because of better garbage collection.
+
+[openblock,card-btn card-btn--blog]
+--------
+
+[.btn.btn--alt]
+xref:blog/Apache-Cassandra-and-Java-SE-11-support.adoc[Read More]
+--------
+
+------
+----
+//end card
+
+//start card
+[openblock,card shadow relative test]
+----
+[openblock,card-header]
+------
+[discrete]
=== Apache Cassandra Upgrade Advisory
[discrete]
==== February 18, 2022
diff --git a/site-content/source/modules/ROOT/pages/blog/Apache-Cassandra-and-Java-SE-11-support.adoc b/site-content/source/modules/ROOT/pages/blog/Apache-Cassandra-and-Java-SE-11-support.adoc
new file mode 100644
index 0000000..faf07a0
--- /dev/null
+++ b/site-content/source/modules/ROOT/pages/blog/Apache-Cassandra-and-Java-SE-11-support.adoc
@@ -0,0 +1,39 @@
+= Apache Cassandra and Java SE 11 support
+:page-layout: single-post
+:page-role: blog-post
+:page-post-date: February, 24 2021
+:page-post-author: Chris Thornett
+:description: The Apache Cassandra Community
+:keywords: Java, Cassandra 4.0, garbage collection
+
+:!figure-caption:
+
+.Image credit: https://unsplash.com/@leunesmedia/[Michiel Leunens on Unsplash^]
+image::blog/apache-cassandra-and-java-se-11-support-unsplash-michiel-leunens.jpg[Java coffee and cake]
+
+In September 2021, https://www.oracle.com/java/technologies/java-se-support-roadmap.html[Oracle
+announced their new Java support roadmap^]. Part of this announcement included the designation of certain releases as Long-Term-Support (LTS). LTS releases are eligible for Oracle's premier and extended support, and a new LTS release will be announced approximately every two years. As of this announcement, Java SE 7, 8, 11, and 17 are designated as LTS releases.
+
+The LTS designation is excellent news for Apache Cassandra. As an open source project aiming to be enterprise-ready, LTS releases give us a target platform to develop atop. We can focus on utilizing and leveraging language features that we know will continue to be developed
+and supported, giving all of our users a feeling of stability, predictability, and confidence.
+
+While earlier versions of Apache Cassandra are built for the Java 8 platform, with the release of version 4.0.2, Cassandra's support for Java 11 will no longer be experimental. We will support Java 11 as our LTS release of choice.
+
+=== Better Performance with Better Garbage Collection
+
+Java 11 has many improvements over Java 8. One significant advantage is the choice of garbage collectors—the process Java uses to remove data that is no longer needed from memory—which can significantly impact microservice performance. Garbage collection can cause unpredictable pauses in Java applications, so any improvements are welcome. There are three promising garbage collectors in Java 11: G1GC, Shenandoah and ZGC, although we can’t expressly recommend ZGC or a LTS release as it is [...]
+
+G1GC, or the
+https://docs.oracle.com/en/java/javase/11/gctuning/garbage-first-garbage-collector.html#GUID-ED3AB6D3-FD9B-4447-9EDF-983ED2F7A573[Garbage-First garbage collector^], is a generational, incremental, parallel, mostly concurrent, stop-the-world, and evacuating garbage collector. While it is not a real-time garbage collector, it aims to minimize pause times and could offer big improvements to Cassandra's performance. New Cassandra 4.0 users should use G1 and begin with a heap between 20 and 31GB.
+
+In contrast to ZGC, the Shenandoah is a low-latency garbage collector that is fully supported in JDK 11. It was introduced in JDK 12 but nearly all functionality has been backported to JDK 11u builds, and it does a good job of maintaining approximately 10ms pause targets with Cassandra heaps of 12GB.
+
+The other low-latency garbage collector option is the https://docs.oracle.com/en/java/javase/11/gctuning/z-garbage-collector1.html#GUID-A5A42691-095E-47BA-B6DC-FB4E5FAA43D0[Z Garbage Collector^], and, as we’ve mentioned, ZGC is still experimental in Java 11 and not officially recommended. With careful testing and evaluation, it is possible to use ZGC. It is a scalable, low-latency garbage collector with sub-microsecond maximum pause times. In addition to its ability to handle much larger [...]
+
+=== Other Improvements in Java 11
+
+Java 11 offers a https://medium.com/skills-matter/key-reasons-to-adopt-java-11-f281072b18d9[number
+of other improvements^], such as suites and protocol have been updated to include TLS v1.3 and associated supporting technologies, performance enhancements, and better in-memory storage for strings. Many of these enhancements are immediately utilized by the Apache Cassandra architecture. We hope that support for Java 11 will show significant performance improvements for our users. We are also working on adding Java 17 support with a future major release.
+
+To learn more about Java 11 support in Apache Cassandra, https://cassandra.apache.org/doc/4.0/cassandra/new/java11.html[check out
+our documentation].
\ No newline at end of file
---------------------------------------------------------------------
To unsubscribe, e-mail: commits-unsubscribe@cassandra.apache.org
For additional commands, e-mail: commits-help@cassandra.apache.org