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| <h1>Apache Cassandra Changelog #12</h1> |
| <h3>February 10, 2022 | The Apache Cassandra Community</h3> |
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| <a href="/_/blog.html">« Back to the Apache Cassandra Blog</a> |
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| <img src="../_images/blog/changelog_header.jpg" alt="Apache Cassandra Changelog"> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>Our monthly roundup of key activities and knowledge to keep the community informed.</p> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="release-notes"><a class="anchor" href="#release-notes"></a>Release Notes</h2> |
| <div class="sectionbody"> |
| <div class="sect2"> |
| <h3 id="release"><a class="anchor" href="#release"></a>Release</h3> |
| <div class="paragraph"> |
| <p>Available since 7th September, the latest release of Apache Cassandra is <a href="https://www.apache.org/dyn/closer.lua/cassandra/4.0.1/" target="_blank" rel="noopener">4.0.1</a>, (<a href="https://downloads.apache.org/cassandra/4.0.1/apache-cassandra-4.0.1-bin.tar.gz.asc" target="_blank" rel="noopener">pgp</a>, <a href="https://downloads.apache.org/cassandra/4.0.1/apache-cassandra-4.0.1-bin.tar.gz.sha256" target="_blank" rel="noopener">sha256</a>, and <a href="https://archive.apache.org/dist/cassandra/4.0.1/apache-cassandra-4.0.1-bin.tar.gz.sha512" target="_blank" rel="noopener">sha512</a>). This was a rapid release to fix a <a href="https://issues.apache.org/jira/browse/CASSANDRA-16877" target="_blank" rel="noopener">critical bug</a> in Gossip on large clusters. Please read the <a href="https://github.com/apache/cassandra/blob/cassandra-4.0.1/CHANGES.txt" target="_blank" rel="noopener">release notes</a> and let us know if you encounter any problems.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Note: As the docs are not yet updated, the bintray location for Debian users is replaced with the <a href="https://apache.jfrog.io/artifactory/cassandra/" target="_blank" rel="noopener">ASF’s JFrog Artifactory location</a>.</p> |
| </div> |
| <div class="paragraph"> |
| <p>See the <a href="../download.html" class="page">download section</a> for the latest stable and older supported versions of source and binary distributions.</p> |
| </div> |
| <div class="paragraph"> |
| <p>To stay up-to-date, we recommend joining the Cassandra <a href="../community.html#discussions" class="page">mailing list</a>.</p> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="community-notes"><a class="anchor" href="#community-notes"></a>Community Notes</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p><em>Updates on Cassandra Enhancement Proposals (CEPs), how to contribute, and other community activities.</em></p> |
| </div> |
| <div class="paragraph"> |
| <p><em>Are you new to the project? We have a handy <a href="../development/index.html" class="page">‘Contributing to Cassandra’</a> page on how to get involved and get started. Additionally, we have established two quick labels you should take a look at if you are new to the project. One is for <a href="https://issues.apache.org/jira/secure/RapidBoard.jspa?rapidView=496&quickFilter=2252" target="_blank" rel="noopener">“Failing Tests”</a> and the other corresponds to our <a href="https://issues.apache.org/jira/secure/RapidBoard.jspa?rapidView=484&quickFilter=2162" target="_blank" rel="noopener">“Low Hanging Fruit”</a>. Feel free to self-select a ticket to work on. Any of these tickets should be of appropriate complexity for someone new to the project to tackle. Just remember to put a note on the ticket. You can also reach out on the <a href="https://the-asf.slack.com/" target="_blank" rel="noopener">ASF Slack</a> in the #cassandra-dev Slack channel. Use @cassandra_mentors to contact any of the 13 designated Cassandra mentors!</em></p> |
| </div> |
| <div class="paragraph"> |
| <p>Read PMC member Josh McKenzie’s <a href="https://lists.apache.org/thread/pclo1tpqsfkc4skxhftrydos89o1t72q" target="_blank" rel="noopener">latest bi-weekly update</a> for ongoing discussions and the latest on ticket progress.</p> |
| </div> |
| <div class="sect2"> |
| <h3 id="added"><a class="anchor" href="#added"></a>Added</h3> |
| <div class="paragraph"> |
| <p>A massive thank you goes to <strong>Lorina Poland</strong> for converting all the Cassandra documentation from reStructuredText to AsciiDoc for the new website and another heartfelt thank you to <strong>Mick Semb Wever</strong> for getting the ticket over the line by working over the holiday period. We also wouldn’t have the site without <strong>Anthony Grasso’s</strong> extensive work moving us to the <a href="https://antora.org/" target="_blank" rel="noopener">Antora</a> platform. Thank you all! 👏</p> |
| </div> |
| <div class="imageblock"> |
| <div class="content"> |
| <a class="image" href="/doc/latest/"><img src="../_images/blog/cassandra-documentation-changelog-12.png" alt="New Cassandra documentation website"></a> |
| </div> |
| <div class="title">Take a look at the newly updated Cassandra documentation site.</div> |
| </div> |
| </div> |
| <div class="sect2"> |
| <h3 id="added-2"><a class="anchor" href="#added-2"></a>Added</h3> |
| <div class="paragraph"> |
| <p>Not sure what branch to target with your work? <strong>Josh McKenzie</strong> has put together a <a href="https://cwiki.apache.org/confluence/x/PpfkCw" target="_blank" rel="noopener">wiki page</a></p> |
| </div> |
| </div> |
| <div class="sect2"> |
| <h3 id="added-3"><a class="anchor" href="#added-3"></a>Added</h3> |
| <div class="paragraph"> |
| <p>We have established a Build Lead role and we are seeking more volunteers. The position is inspired by the ‘Build Baron’ role used in MongoDB, but more focused on triaging test failures and database correctness, but it may evolve into a performance regression and change point triage role in the future. Read the <a href="https://cwiki.apache.org/confluence/x/DI3kCw" target="_blank" rel="noopener">wiki page</a> for what’s involved in this rotating position and sign-up!</p> |
| </div> |
| </div> |
| <div class="sect2"> |
| <h3 id="discussed"><a class="anchor" href="#discussed"></a>Discussed</h3> |
| <div class="paragraph"> |
| <p>The discussion for <a href="https://cwiki.apache.org/confluence/x/kYuqCw" target="_blank" rel="noopener">CEP-19 Trie Memtable Implementation</a> is <a href="https://lists.apache.org/thread/fdvf1wmxwnv5jod59jznbnql23nqosty" target="_blank" rel="noopener">underway</a>. Memtables can become a pain point for memory management and garbage collection, <strong>Branimir Lambov</strong> is proposing an alternative memtable implementation based on <a href="https://github.com/blambov/cassandra/blob/CASSANDRA-17240/src/java/org/apache/cassandra/db/tries/MemtableTrie.md" target="_blank" rel="noopener">tries</a>. Join the discussion if you have an interest in high-performance data structures!</p> |
| </div> |
| </div> |
| <div class="sect2"> |
| <h3 id="discussed-2"><a class="anchor" href="#discussed-2"></a>Discussed</h3> |
| <div class="paragraph"> |
| <p><strong>Paulo Motta</strong> has started <a href="https://lists.apache.org/thread/rht6py71z1f8cxjzpo22bhgzl3f60kdp" target="_blank" rel="noopener">a thread on the mailing list</a> asking contributors to start tagging Jira tickets and submit ideas for the Google Summer of Code (GSOC). We’ll be posting more details on our program later in February, but the key thing to highlight is that GSoC will not be solely focused on students and open to anyone over 18.</p> |
| </div> |
| </div> |
| <div class="sect2"> |
| <h3 id="discussed-3"><a class="anchor" href="#discussed-3"></a>Discussed</h3> |
| <div class="paragraph"> |
| <p>As the Apache Cassandra ecosystem matures, we’re are beginning to chart a way forward for non-developer roles, such as marketing (see last year’s report on <a href="https://lists.apache.org/thread/lop4rkwsz82c8lznlhf1q7oddf7xzzpk" target="_blank" rel="noopener">marketing contributions</a>), website editing, and developer evangelism to become project committers.</p> |
| </div> |
| </div> |
| <div class="sect2"> |
| <h3 id="discussed-4"><a class="anchor" href="#discussed-4"></a>Discussed</h3> |
| <div class="paragraph"> |
| <p><strong>Ekaterina Dimitrova</strong> drove a discussion about <a href="https://lists.apache.org/thread/mnxh94lg9v94bfntq88051z3ww16q2fk" target="_blank" rel="noopener">the future of UDF as it relates to recent Cassandra releases, JavaScript, and JDK17</a>. The TL;DR is that we will target a pluggable hooks API for UDFs and let the ecosystem maintain and evolve externally.</p> |
| </div> |
| </div> |
| <div class="sect2"> |
| <h3 id="passed"><a class="anchor" href="#passed"></a>Passed</h3> |
| <div class="paragraph"> |
| <p>The wiki now includes a formalized <a href="https://cwiki.apache.org/confluence/x/KJfkCw" target="_blank" rel="noopener">guide to the Cassandra Continuous Integration process</a> and covers such questions as what CI criteria are we using to gate minor and major releases?</p> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="user-space"><a class="anchor" href="#user-space"></a>User Space</h2> |
| <div class="sectionbody"> |
| <div class="sect2"> |
| <h3 id="netflix"><a class="anchor" href="#netflix"></a>Netflix</h3> |
| <div class="paragraph"> |
| <p>“Netflix uses Apache Cassandra heavily to satisfy its ever-growing persistence needs on its mission to entertain the world. We have been experimenting and partially using the 4.0 beta in our environments and its features like Audit Logging and backpressure.” - <a href="https://www.globenewswire.com/news-release/2021/07/27/2269647/17401/en/The-Apache-Cassandra-Project-Releases-Apache-Cassandra-v4-0-the-Fastest-Most-Scalable-and-Secure-Cassandra-Yet.html" target="_blank" rel="noopener">Vinay Chella</a></p> |
| </div> |
| </div> |
| <div class="sect2"> |
| <h3 id="verizon"><a class="anchor" href="#verizon"></a>Verizon</h3> |
| <div class="paragraph"> |
| <p>“I love the way we can grow or resize our Cassandra clusters with ease and also support for multi-DC and multi-Cloud is designed at core." - <a href="https://www.devprojournal.com/technology-trends/open-source/whats-included-in-the-cassandra-4-0-release-2/" target="_blank" rel="noopener">Sarma Pydipally</a></p> |
| </div> |
| <div class="paragraph"> |
| <p><em>Do you have a Cassandra case study to share? Email <a href="mailto:cassandra@constantia.io">cassandra@constantia.io</a>.</em></p> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="in-the-news"><a class="anchor" href="#in-the-news"></a>In the News</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>ZDNet: |
| <a href="https://www.zdnet.com/article/data-2022-outlook-part-i-will-data-clouds-get-easier-and-streaming-get-off-its-own-island/" target="_blank" rel="noopener">Data 2022 outlook, part one: Will data clouds get easier? Will streaming get off its own island?</a></p> |
| </div> |
| <div class="paragraph"> |
| <p>RT Insights: <a href="https://www.rtinsights.com/no-time-to-waste-100000-messages-a-second-and-growing/" target="_blank" rel="noopener">No Time to Waste: 100,000 Messages a Second and Growing</a></p> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="cassandra-tutorials-more"><a class="anchor" href="#cassandra-tutorials-more"></a>Cassandra Tutorials & More</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p><a href="https://spring.io/guides/gs/accessing-data-cassandra/" target="_blank" rel="noopener">Accessing Data with Cassandra</a> - Spring</p> |
| </div> |
| <div class="paragraph"> |
| <p><a href="https://thelastpickle.com/blog/2021/01/29/impacts-of-changing-the-number-of-vnodes.html" target="_blank" rel="noopener">The Impacts of Changing the Number of VNodes in Apache Cassandra</a> - Anthony Grasso</p> |
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