安装使用Cassandra数据库

1、下载安装包

需要用到比较老的版本1.1.5，下载地址http://archive.apache.org/dist/cassandra/，这里归档的版本很全。

2、解压

tar -zxvf apache-cassandra-1.1.5-bin.tar.gz

3、启动服务

bin/cassandra -f

4、测试使用

#创建keyspace
CREATE KEYSPACE keyspace1 WITH strategy_class='org.apache.cassandra.locator.SimpleStrategy' AND strategy_options:replication_factor=1;

#切换keyspace
USE keyspace1;

#创建表
CREATE COLUMNFAMILY users (id varchar PRIMARY KEY, email varchar);

#创建索引
CREATE INDEX users_email_idx ON users (email);

#插入数据
INSERT INTO users (id, email) VALUES ('kreynolds', '[email protected]');
INSERT INTO users (id, email) VALUES ('hhh', '[email protected]');
INSERT INTO users (id, email) VALUES ('hhhkkk','[email protected]');
INSERT INTO users (id, email) VALUES ('llll', '[email protected]');
INSERT INTO users (id, email) VALUES ('mmmm', '[email protected]');

5、把数据刷新到磁盘

nodetool flush

6、导出json数据

bin/sstable2json /var/lib/cassandra/data/keyspace1/users/keyspace1-users-he-1-Data.db