整理了一下Cassandra3的简单通信代码，包括增删改查。
Category Archives: Cassandra
Cassandra3基本操作01
1、首先看一下各节点状态
neohope@debian8-node01:~/Deploy/apache-cassandra-3.0.1$ bin/nodetool status Datacenter: datacenter1 ======================= Status=Up/Down |/ State=Normal/Leaving/Joining/Moving -- Address Load Tokens Owns Host ID Rack UN 172.16.172.23 230.25 KB 256 ? 760879a3-e06b-43bb-97bf-b045a655da9c rack1 UN 172.16.172.24 237.17 KB 256 ? 5bf3e77d-ccf4-4f81-9465-de0babe1e0cc rack1 UN 172.16.172.25 241.55 KB 256 ? 5a7ed53f-c8e0-4658-af9a-41880dada5ef rack1 Note: Non-system keyspaces don't have the same replication settings, effective ownership information is meaningless
2、然后用cqlsh连接cassandra
neohope@debian8-node01:~/Deploy/apache-cassandra-3.0.1$ bin/cqlsh debian8-node01 Connected to NeoCluster at debian8-node01:9042. [cqlsh 5.0.1 | Cassandra 3.0.1 | CQL spec 3.3.1 | Native protocol v4] Use HELP for help. cqlsh:neokeyspace> help Documented shell commands: =========================== CAPTURE CLS COPY DESCRIBE EXPAND LOGIN SERIAL SOURCE UNICODE CLEAR CONSISTENCY DESC EXIT HELP PAGING SHOW TRACING CQL help topics: ================ AGGREGATES CREATE_KEYSPACE DROP_TRIGGER TEXT ALTER_KEYSPACE CREATE_MATERIALIZED_VIEW DROP_TYPE TIME ALTER_MATERIALIZED_VIEW CREATE_ROLE DROP_USER TIMESTAMP ALTER_TABLE CREATE_TABLE FUNCTIONS TRUNCATE ALTER_TYPE CREATE_TRIGGER GRANT TYPES ALTER_USER CREATE_TYPE INSERT UPDATE APPLY CREATE_USER INSERT_JSON USE ASCII DATE INT UUID BATCH DELETE JSON BEGIN DROP_AGGREGATE KEYWORDS BLOB DROP_COLUMNFAMILY LIST_PERMISSIONS BOOLEAN DROP_FUNCTION LIST_ROLES COUNTER DROP_INDEX LIST_USERS CREATE_AGGREGATE DROP_KEYSPACE PERMISSIONS CREATE_COLUMNFAMILY DROP_MATERIALIZED_VIEW REVOKE CREATE_FUNCTION DROP_ROLE SELECT CREATE_INDEX DROP_TABLE SELECT_JSON
搭建Cassandra集群环境
1、环境准备
VirtualBox4 Debian8 JDK8u60 Cassandra3
2、安装虚拟机，安装Guset插件
su apt-get install gcc apt-get install linux-headers-$(uname -r) apt-get install build-essential ./VBoxLinuxAdditions.run
设置共享目录，将需要的文件拷贝到虚拟机。
当然也可以设置好虚拟的的ssh后，用scp或winscp将文件拷贝到虚拟机。
3.网络配置为两块网卡，第一块为Hostonly设为固定IP，第二块为NAT，设置为dhcp
修改配置文件/etc/network/interfaces
auto lo iface lo inet loopback auto eth0 iface eth0 inet static address 172.16.172.23 netmask 255.255.0.0 gateway 172.16.172.2 auto eth1 iface eth1 inet dhcp
修改hosts文件
#/etc/hosts 127.0.0.1 localhost 172.16.172.23 node01 172.16.172.24 node02 172.16.172.25 node03
修改hostname
#/etc/hostname node01
根据需要（一般用不到），修改配置文件/etc/resolv.conf
nameserver xxx.xxx.xxx.xxx
重启网卡
su ifconfig eth0 down ifconfig eth0 up ifconfig eth1 down ifconfig eth1 up