site-content/source/modules/ROOT/pages/blog/Apache-Cassandra-Changelog-1-October-2020.adoc (53 lines of code) (raw):
= Apache Cassandra Changelog #1
:page-layout: single-post
:page-role: blog-post
:page-post-date: October 28, 2020
:page-post-author: The Apache Cassandra Community
:description: The Apache Cassandra Community
:keywords:
image::blog/changelog_header.jpg[Apache Cassandra Changelog]
Our monthly roundup of key activities and knowledge to keep the community informed.
== Release Notes
=== Released
The most current Apache Cassandra releases are 4.0-beta2, 3.11.8, 3.0.22, 2.2.18 and 2.1.22 released on August 31 and are xref:download.adoc[in the repositories]. The next cut of releases will be out soon.
Join the Cassandra xref:community.adoc#discussions[mailing list] to stay updated.
We continue to make progress toward the 4.0 GA release with the overarching goal of it being at a state where major users should feel confident running it in production when it is cut. Over 1,300 Jira tickets have been closed and https://issues.apache.org/jira/projects/CASSANDRA/versions/12346094[less than 100,window=_blank] remain as of this post. To gain this confidence, there are various ongoing testing efforts involving correctness, performance, and ease of use.
=== Added
With CASSANDRA-15013, the community improved Cassandra's ability to xref:blog/Improving-Apache-Cassandras-Front-Door-and-Backpressure.adoc[handle high throughput workloads], while having enough safeguards in place to protect itself from potentially going out of memory.
=== Added
The https://github.com/apache/cassandra-harry/blob/master/README.md[Harry project,window=_blank] is a fuzz testing tool that aims to generate reproducible workloads that are as close to real-life as possible, while being able to efficiently verify the cluster state against the model without pausing the workload itself.
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=== Added
The community published its first xref:blog/Apache-Cassandra-Usage-Report-2020.adoc[Apache Cassandra Usage Report 2020] detailing findings from a comprehensive global survey of 901 practitioners on Cassandra usage to provide a baseline understanding of who, how, and why organizations use Cassandra.
== Community Notes
_Updates on Cassandra Enhancement Proposals (CEPs), how to contribute, and other community activities._
=== Added
https://cwiki.apache.org/confluence/display/CASSANDRA/CEP-7%3A+Storage+Attached+Index[CEP-7: Storage Attached Index (SAI),window=_blank] is a new secondary index for Cassandra that builds on the advancements made with SASI. It is intended to replace the existing built-in secondary index implementations.
=== Added
Cassandra was selected by the ASF Diversity & Inclusion committee to be https://lists.apache.org/thread.html/rfa1673c9f8b42cf286f5fb763eb987eced2bdea1a619358869a49bef%40%3Cdev.cassandra.apache.org%3E[included in a research project,window=_blank] to evaluate and understand the current state of diversity.
=== Changed
https://cwiki.apache.org/confluence/display/CASSANDRA/CEP-2+Kubernetes+Operator[CEP-2: Kubernetes Operator,window=_blank] was introduced this year and is an active discussion on creation of a community-based operator with the goal of making it easy to run Cassandra on Kubernetes.
== User Space
=== Bigmate
"In vetting MySQL, MongoDB, and other potential databases for IoT scale, we found they couldn't match the scalability we could get with open source Apache Cassandra. Cassandra's built-for-scale architecture enables us to handle millions of operations or concurrent users each second with ease – making it ideal for IoT deployments." - https://www.iotcentral.io/blog/how-open-source-apache-cassandra-solved-our-iot-scalability-and-r[Brett Orr,window=_blank]
=== Bloomberg
"Our group is working on a multi-year build, creating a new Index Construction Platform to handle the daily production of the Bloomberg Barclays fixed income indices. This involves building and productionizing an Apache Solr-backed search platform to handle thousands of searches per minute, an Apache Cassandra back-end database to store millions of data points per day, and a distributed computational engine to handle millions of computations daily." - https://www.techatbloomberg.com/blog/meet-the-team-indices-engineering/[Noel Gunasekar,window=_blank]
_Do you have a Cassandra case study to share? Email cassandra@constantia.io_.
== In the News
Solutions Review: https://solutionsreview.com/data-management/the-five-best-apache-cassandra-books-on-our-reading-list/[The Five Best Apache Cassandra Books on Our Reading List,window=_blank]
ZDNet: https://www.zdnet.com/article/what-cassandra-users-think-of-their-nosql-dbms/[What Cassandra users think of their NoSQL DBMS,window=_blank]
Datanami: https://www.datanami.com/2020/09/22/cassandra-adoption-correlates-with-experience/[Cassandra Adoption Correlates with Experience,window=_blank]
Container Journal: https://containerjournal.com/topics/container-management/5-to-1-an-overview-of-apache-cassandra-kubernetes-operators/[5 to 1: An Overview of Apache Cassandra Kubernetes Operators,window=_blank]
Datanami: Cassandra Gets Monitoring, https://www.datanami.com/2020/07/21/cassandra-gets-monitoring-performance-upgrades/[Performance Upgrades,window=_blank]
ZDNet: Faster than ever, https://www.zdnet.com/article/faster-than-ever-apache-cassandra-4-0-beta-is-on-its-way/[Apache Cassandra 4.0 beta is on its way,window=_blank]
== Cassandra Tutorials & More
A Cassandra user was in search of a tool to perform schema DDL upgrades. Another user suggested https://github.com/patka/cassandra-migration[https://github.com/patka/cassandra-migration,window=_blank] to ensure you don't get schema mismatches if running multiple upgrade statements in one migration. See the https://lists.apache.org/thread.html/rdfee145c4c5d920f644c6bcd081c6fb446d52b055c133485217b8143%40%3Cuser.cassandra.apache.org%3E[full email,window=_blank] on the user mailing list for other recommended tools.
https://opensource.com/article/20/10/virtual-tables-apache-cassandra[Start using virtual tables in Apache Cassandra 4.0,window=_blank] - Ben Bromhead, Instaclustr
https://pkolaczk.github.io/benchmarking-cassandra/[Benchmarking Apache Cassandra with Rust,window=_blank] - Piotr Kołaczkowski, DataStax
https://blog.anant.us/open-source-bi-tools-and-cassandra/[Open Source BI Tools and Cassandra,window=_blank] - Arpan Patel, Anant Corporation
https://dzone.com/articles/build-fault-tolerant-applications-with-cassandra-a[Build Fault Tolerant Applications With Cassandra API for Azure Cosmos DB,window=_blank] - Abhishek Gupta, Microsoft
https://www.red-gate.com/simple-talk/blogs/understanding-data-modifications-in-cassandra/[Understanding Data Modifications in Cassandra,window=_blank] - Sameer Shukla, Redgate
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