{"id":100871,"date":"2021-07-29T16:23:28","date_gmt":"2021-07-29T14:23:28","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/dostupna-subd-apache-cassandra-4-0"},"modified":"2021-07-29T16:23:28","modified_gmt":"2021-07-29T14:23:28","slug":"dostupna-subd-apache-cassandra-4-0","status":"publish","type":"post","link":"https:\/\/prohoster.info\/en\/blog\/news\/dostupna-subd-apache-cassandra-4-0","title":{"rendered":"Apache Cassandra 4.0 Database Management System Available","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

The Apache Software Foundation has released the distributed database Apache Cassandra 4.0, which belongs to the noSQL system class and is designed for creating highly scalable and reliable storage solutions for vast amounts of data stored in the form of an associative array (hash). The release of Cassandra 4.0 is considered ready for production deployments and has already been tested in the infrastructures of companies like Amazon, Apple, DataStax, Instaclustr, iland, and Netflix, with clusters consisting of over 1,000 nodes. The project's code is written in Java and is distributed under the Apache 2.0 license. <\/p>\n

Initially, the Cassandra DBMS was developed by Facebook and handed over to the Apache Foundation in 2009. Industrial solutions based on Cassandra are deployed to support services for companies like Apple, Adobe, CERN, Cisco, IBM, HP, Comcast, Disney, eBay, Huawei, Netflix, Sony, Rackspace, Reddit, and Twitter. For instance, Apple's deployed storage infrastructure based on Apache Cassandra consists of over a thousand clusters, including 160,000 nodes and storing more than 100 petabytes of data. Huawei utilizes over 300 Apache Cassandra clusters, comprising 30,000 nodes, while Netflix operates more than 100 clusters, covering 10,000 nodes and processing over a trillion requests per day. <\/p>\n

Cassandra DBMS combines a fully distributed hash system, Dynamo, which provides nearly linear scalability as data volume increases. Cassandra uses a ColumnFamily-based data storage model, which differs from systems like memcachedb that only store data in key\/value pairs, allowing for organized storage of hashes with several levels of nesting. To simplify interaction with the database, it supports the Cassandra Query Language (CQL), which resembles SQL but is limited in functionality. Key features include support for namespaces and column families, and the ability to create indexes using the \"CREATE INDEX\" statement. <\/p>\n

The database allows for the creation of fault-tolerant storage: data placed in the database is automatically replicated across multiple nodes in a distributed network, which can span different data centers<\/a>In the event of a node failure, its functions are seamlessly taken over by other nodes. Adding new nodes to the cluster and updating the Cassandra version can be done on the fly, without additional manual intervention or reconfiguration of other nodes. Drivers that support CQL are available for Python, Java (JDBC\/DBAPI2), Ruby, PHP, C++, and JavaScript (Node.js). <\/p>\n

Key innovations: <\/p>\n