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= Apache Cassandra Changelog #2 :page-layout: single-post :page-role: blog-post :page-post-date: December 01, 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 Apache #Cassandra 4.0-beta3, 3.11.9, 3.0.23, and 2.2.19 were released on November 4 and are xref:download.adoc[in the repositories,window=_blank]. Please pay attention to release notes and let the community know if you encounter problems. Join the Cassandra xref:community.adoc#discussions[mailing list] to stay updated. === Changed Cassandra 4.0 is progressing toward GA. There are 1,390 total tickets and remaining tickets represent 5.5% of total scope. Read the https://lists.apache.org/thread.html/r9c6cc19f67d3259e64abbe2b960b8914476d9bfa2463d57c6d5cc44b%40%3Cdev.cassandra.apache.org%3E[full summary,window=_blank] shared to the dev mailing list and take a look at the https://issues.apache.org/jira/secure/RapidBoard.jspa?rapidView=355&quickFilter=1661&quickFilter=1658[open tickets,window=_blank] that need reviewers. Cassandra 4.0 will be dropping support for older distributions of CentOS 5, Debian 4, and Ubuntu 7.10. https://lists.apache.org/thread.html/r513c507ef19a8524ad5389e548f3d5bbfeb9e7747f3ae4c57ec27329%40%3Cdev.cassandra.apache.org%3E[Learn more,window=_blank]. == Community Notes _Updates on Cassandra Enhancement Proposals (CEPs), how to contribute, and other community activities._ === Added The community weighed options to address reads inconsistencies for Compact Storage as noted in ticket https://issues.apache.org/jira/browse/CASSANDRA-16217[CASSANDRA-16217,window=_blank] (committed). The conversation continues in ticket https://issues.apache.org/jira/browse/CASSANDRA-16226[CASSANDRA-16226,window=_blank] with the aim of ensuring there are no huge performance regressions for common queries when you upgrade from 2.x to 3.0 with Compact Storage tables or drop it from a table on 3.0+. === Added https://issues.apache.org/jira/browse/CASSANDRA-16222[CASSANDRA-16222,window=_blank] is a Spark library that can compact and read raw Cassandra SSTables into SparkSQL. By reading the sstables directly from a snapshot directory, one can achieve high performance with minimal impact to a production cluster. It was used to successfully export a 32TB Cassandra table (46bn CQL rows) to HDFS in Parquet format in around 70 minutes, a 20x improvement on previous solutions. === Changed Great news for https://cwiki.apache.org/confluence/display/CASSANDRA/CEP-2+Kubernetes+Operator[CEP-2: Kubernetes Operator,window=_blank], the community has agreed to https://lists.apache.org/thread.html/r9e1ff94d7b35cfc663bfa72d4ed3767e963e890f9e1199bfdb96bff0%40%3Cdev.cassandra.apache.org%3E[create a community-based operator,window=_blank] by merging the cass-operator and CassKop. The work being done can be viewed on GitHub https://github.com/datastax/cass-operator[here,window=_blank]. === Released The Reaper community https://thelastpickle.com/blog/2020/10/26/reaper-2_1-released-with-astra-support.html[announced v2.1,window=_blank] of its tool that schedules and orchestrates repairs of Apache Cassandra clusters. Read the http://cassandra-reaper.io/docs/[docs,window=_blank]. === Released Apache Cassandra 4.0-beta-1 was https://lists.apache.org/thread.html/r040f39dcc038d607c0cc36731150ce8ecb67d7399304db97e7f8b38b%40%3Cuser.cassandra.apache.org%3E[released on FreeBSD,window=_blank]. == User Space === Netflix “With these optimized Cassandra clusters in place, it now costs us 71% less to operate clusters and we could store 35x more data than our previous configuration.” - https://netflixtechblog.com/building-netflixs-distributed-tracing-infrastructure-bb856c319304[Maulik Pandey,window=_blank] === Yelp “Cassandra is a distributed wide-column NoSQL datastore and is used at Yelp for both primary and derived data. Yelp’s infrastructure for Cassandra has been deployed on AWS EC2 and ASG (Autoscaling Group) for a while now. Each Cassandra cluster in production spans multiple AWS regions.” - https://engineeringblog.yelp.com/2020/11/orchestrating-cassandra-on-kubernetes-with-operators.html[Raghavendra D Prabhu,window=_blank] _Do you have a Cassandra case study to share? Email mailto:cassandra@constantia.io[cassandra@constantia.io]_. == In the News DevPro Journal: https://www.devprojournal.com/technology-trends/open-source/whats-included-in-the-cassandra-4-0-release/[What’s included in the Cassandra 4.0 Release?,window=_blank] JAXenter: https://jaxenter.com/cloud-native-cassandra-172909.html[Moving to cloud-native applications and data with Kubernetes and Apache Cassandra,window=_blank] DZone: https://dzone.com/articles/improving-apache-cassandras-front-door-and-backpre[Improving Apache Cassandra’s Front Door and Backpressure,window=_blank] ApacheCon: https://www.youtube.com/watch?v=rjCVqjLRALo[Building Apache Cassandra 4.0: behind the scenes,window=_blank] == Cassandra Tutorials & More Users in search of a tool for scheduling backups and performing restores with cloud storage support (archiving to AWS S3, GCS, etc) should consider https://github.com/thelastpickle/cassandra-medusa/wiki[Cassandra Medusa,window=_blank]. https://blog.mayadata.io/apache-cassandra-deployment-on-openebs-and-monitoring-on-kubera[Apache Cassandra Deployment on OpenEBS and Monitoring on Kubera,window=_blank] - Abhishek Raj, MayaData https://www.youtube.com/watch?v=Z0NXWmZAB8s[Lucene Based Indexes on Cassandra,window=_blank] - Rahul Singh, Anant https://www.youtube.com/watch?v=8QV2Mc-1s64[How Netflix Manages Version Upgrades of Cassandra at Scale,window=_blank] - Sumanth Pasupuleti, Netflix https://thelastpickle.com/blog/2020/11/25/impacts-of-many-tables-on-cassandra.html[Impacts of many tables in a Cassandra data model,window=_blank] - Alex Dejanovski, The Last Pickle https://www.youtube.com/watch?v=eTUXQS7RUQw&list=PLU2OcwpQkYCy_awEe5xwlxGTk5UieA37m&index=181[Cassandra Upgrade in production : Strategies and Best Practices,window=_blank] - Laxmikant Upadhyay, American Express https://medium.com/@jeromatron/apache-cassandra-collections-and-tombstones-a45315e97cbc[Apache Cassandra Collections and Tombstones,window=_blank] - Jeremy Hanna https://itnext.io/spark-cassandra-all-you-need-to-know-tips-and-optimizations-d3810cc0bd4e[Spark + Cassandra, All You Need to Know: Tips and Optimizations,window=_blank] - Javier Ramos, ITNext https://www.techrepublic.com/article/how-to-install-the-apache-cassandra-nosql-database-server-on-ubuntu-20-04/[How to install the Apache Cassandra NoSQL database server on Ubuntu 20.04,window=_blank] - Jack Wallen, TechRepublic https://sindhumurugavel.medium.com/how-to-deploy-cassandra-on-openshift-and-open-it-up-to-remote-connections-c7783861b868[How to deploy Cassandra on Openshift and open it up to remote connections,window=_blank] - Sindhu Murugavel image::blog/changelog_footer.jpg[link="{site-url}_/community.html"]