解壓cassandra的安裝包后可以查看主要的配置文件，都在conf/目錄下，conf/cassandra.yaml比較重要，其中需要着重注意的有以下一些配置項：

cluster_name: 'TC01'
num_tokens: 256
seed_provider:
    - class_name: org.apache.cassandra.locator.SimpleSeedProvider
      parameters:
          - seeds: "192.168.2.103"
listen_address: 192.168.2.103
rpc_address: 192.168.2.103
endpoint_snitch: SimpleSnitch

cluster_name一定要修改，免得用默認的“Test Cluster”和他人沖突，所有有顯示ip的地方都需要注意並修改，將127.0.0.1和localhost改為你的對外訪問的ip，比如我的局域網ip就是192.168.2.103。

啟動cassandra，

XXXXX@XXXXX-asus:~/apache-cassandra-2.0.6$ cd bin/
XXXXX@XXXXX-asus:~/apache-cassandra-2.0.6/bin$ ./cassandra -f

現在cassandra已經啟動了節點1，節點2在一台虛擬機上（ip:192.168.2.102），其配置與節點1非常類似，要改動配置里面的seeds那一項的ip為節點1的ip

cluster_name: 'TC01'
num_tokens: 256
seed_provider:
    - class_name: org.apache.cassandra.locator.SimpleSeedProvider
      parameters:
          - seeds: "192.168.2.103"
listen_address: 192.168.2.102
rpc_address: 192.168.2.102
endpoint_snitch: SimpleSnitch

以同樣的方式啟動節點2，就可以在節點1中看到節點2已經加入到集群。此時，節點1的log中可以看到以下信息

 WARN 17:36:15,477 Gossip stage has 1 pending tasks; skipping status check (no nodes will be marked down)
 INFO 17:36:16,358 Handshaking version with /192.168.2.102
 INFO 17:36:17,999 Node /192.168.2.102 is now part of the cluster
 INFO 17:36:18,496 Handshaking version with /192.168.2.102
 INFO 17:36:18,727 InetAddress /192.168.2.102 is now UP
 INFO 17:36:53,523 [Stream #24d92630-c2ef-11e3-9d13-81bcfc870408] Received streaming plan for Bootstrap
 INFO 17:36:54,336 [Stream #24d92630-c2ef-11e3-9d13-81bcfc870408] Session with /192.168.2.102 is complete
 INFO 17:36:54,586 [Stream #24d92630-c2ef-11e3-9d13-81bcfc870408] All sessions completed

如果用nodetool來看，可以看到以下信息

XXXXX@XXXXX-asus:~/apache-cassandra-2.0.6/bin$ ./nodetool status
Datacenter: datacenter1
=======================
Status=Up/Down
|/ State=Normal/Leaving/Joining/Moving
--  Address        Load       Tokens  Owns (effective)  Host ID                               Rack
UN  192.168.2.102  54.74 KB   256     100.0%            00782976-b020-43a7-8fa5-b7dee95e6f1e  rack1
UN  192.168.2.103  45.75 KB   256     100.0%            80a96105-819a-40f2-ac7c-489285017de1  rack1

很清楚的可以看到2個節點全部在線。

然后

 ./cassandra-cli -h 192.168.2.103 -p 9160

就可以去操作集群數據了！