datastax cassandra

With the development of Internet technology, the requirement of data storage is high, there is high demand in capacity, security, backup, high availability and so on, the popular relational database has SQL Server, MySQL, Orcale, etc., non-relational database has key, value type Redis , Memcached, the document database has MongoDB, CouchDB, and the list of types of HBase, Cassandra. A wide variety of knowledge points to learn more and more, we in the

Recently, I tried to build a cloud storage platform. After constant comparison, I decided to use Cassandra as the underlying database. Here we record the learning process of Cassandra. Cassandra is a hybrid non-relational database with distributed, column-based structure and high scalability. Cassandra is not a databas

A while ago, Cassandra-0.7.0-beta1 was released, todayCodeAfter a rough look, we found that the main changes were as follows: 1. The keyspace and columnfamily in the data model can be dynamically modified: In earlier versions, If You Want To modify keyspace and columnfamily in Cassandra, you must stop Cassandra, modify the configuration file, and then rest

1. Background Cassandra uses a Distributed Hash table (DHT) to determine the nodes that store a data object. In the DHT, the nodes and Data Objects responsible for storage are allocated with a token. Token can only be set within a certain range. For example, if MD5 is used as the token, the value range is [0, 2 ^ 128-1]. Storage nodes and objects are arranged into a ring based on the token size, that is, the largest token is followed by the smallest

When you see this title, you will certainly ask. How is this integration defined? In my opinion, the so-called integration means that we can write mapreduceProgramRead data from HDFS and insert it into Cassandra. You can also directly read data from Cassandra and perform corresponding calculations. Read data from HDFS and insert it into cassandra For this type

1. Basic Configuration First, you need to prepare 3 or more computers. The following assumes 3 computers running a Linux operating system with IP addresses of 192.168.0.100, 192.168.0.101, and 192.168.0.102. The system needs to install the Java runtime environment and then download the 0.7 version of the Cassandra binary release package here. Select one of the machines to start the configuration, first expand the

1, Cassandra IntroductionApache Cassandra is a set of open source distributed key-value storage systems. It was originally developed by Facebook to store particularly large data. Cassandra is not a database, it is a mixed non-relational database, similar to Google's BigTable. This article mainly from the following five aspects to introduce CASSANDRA:CASSANDRA dat

How to install and deploy Cassandra distributed NoSQL Database Apache Cassandra is an open-source Distributed Key-Value storage system. It was initially developed by Facebook to store particularly large data. Cassandra is suitable for real-time transaction processing and provision of structured data. Cassandra's data model is a four-dimensional or five-Dimensiona

 Various strategies in the Cassandra http://dongxicheng.org/nosql/cassandra-strategy/ 1. Background information Cassandra uses a distributed hash table (DHT) to determine the node that stores a data object. In DHT, the node that is responsible for the storage and the data object are assigned a token. Tokens can only be used within a certain range, for exampl

Framework Introduction: A summary of Cassandra distributed database (due to the relatively small number of Cassandra data, the summary is only a personal understanding, as a reference only): Cassandra is a kind of nosql database and a lightweight distributed database based on column family storage. Thrift Framework: The Cass