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补充 by -- -- [[flyinflash]] <<Date(2010-01-11T12:22:01Z)>> | 补充 by -- -- [[flyinflash]] <<Date(2010-01-11T12:22:01Z <<DateTime(2010-01-11T12:22:50Z)>> )>> |
Contents
Apache Cassandra
A highly scalable, eventually consistent, distributed, structured key-value store.
一个高度可扩展、最終一致、分布式和结构化key-value儲存方案。
下载
从 http://incubator.apache.org/cassandra/download/ 选择二进制包下载,包名类似 apache-cassandra-incubating-x.y.z-bin.tar.gz 。
设置和运行
为了方便,下面所有命令以root身份执行。
以一个独立节点运行
tar -zxvf cassandra-$VERSION.tar.gz mv cassandra-$VERSION /opt/cassandra sudo mkdir -p /var/log/cassandra sudo mkdir -p /var/lib/cassandra echo 'alias PATH=$PATH:/opt/cassandra/bin/' >> ~/.bashrc && source ~/.bashrc
创建start-cassandra.sh
/opt/cassandra/bin/cassand
创建stop-cassandra.sh
kill `ps aux | fgrep $USER | grep cassandra | grep -v 'grep' | awk '{print $2}'`
创建show-cassandra.sh
#/bin/bash echo "cassandra PID: `ps aux | fgrep $USER | grep cassandra | grep -v 'grep' | awk '{print $2}'`"
以后台方式运行节点:
./start-cassandra.sh
或以前台方式运行:
cassandra -f
测试
cassandra-cli --host localhost --port 9160
如果成功会显示:
Connected to localhost/9160 Welcome to cassandra CLI. Type 'help' or '?' for help. Type 'quit' or 'exit' to quit. cassandra>
尝试写和读键:
set Keyspace1.Standard1['shugelee']['first'] = 'Lee' set Keyspace1.Standard1['shugelee']['last'] = 'Li' set Keyspace1.Standard1['shugelee']['age'] = '21' get Keyspace1.Standard1['shugelee']
結果类似:
(column=last, value=li; timestamp=1263050140529) (column=first, value=lee; timestamp=1263050117638) (column=age, value=18; timestamp=1263050155638) Returned 3 rows.
以一个簇(集群)运行
假定两台debian均按上面安装并初步设置了cassandra环境:
- - A 192.168.1.101 [development server] - B 192.168.1.105 [developer Lee Li]
将A 192.168.1.101 [development server]作为主server运行。
development server的设置
<Seed>127.0.0.1</Seed>
改为:
<Seed>192.168.1.101</Seed>
<ListenAddress>localhost</ListenAddress>
改为:
<ListenAddress>192.168.1.105</ListenAddress>
<ThriftAddress>localhost</ThriftAddress>
改为:
<ThriftAddress>0.0.0.0</ThriftAddress>
developer Lee Li的设置
<Seed>127.0.0.1</Seed>
改为:
<Seed>192.168.1.101</Seed> <Seed>192.168.1.105</Seed>
<ListenAddress>localhost</ListenAddress>
改为:
<ListenAddress>192.168.1.101</ListenAddress>
<ThriftAddress>localhost</ThriftAddress>
改为:
<ThriftAddress>0.0.0.0</ThriftAddress>
分别运行A和B上的cassandra:
canssandra -f
分别在A和B上测试:
nodeprobe -host 192.168.1.101 ring
如果成功,結果类似:
DEBUG - Loading settings from /opt/cassandra/bin/../conf/storage-conf.xml DEBUG - Syncing log with a period of 1000 Starting Token Ending Token Size Address Ring 132617574668126261121070408499066554197 127319937893509951017249225297128612859 1 192.168.1.101 |<--| 127319937893509951017249225297128612859 132617574668126261121070408499066554197 1 192.168.1.105 |-->|
分别在A和B上测试链接到一个node:
cassandra-cli --host 192.168.1.105 --port 9160
如果成功,結果类似:
# cassandra-cli --host 192.168.1.105 --port 9160 Connected to 192.168.1.105/9160 Welcome to cassandra CLI. Type 'help' or '?' for help. Type 'quit' or 'exit' to quit. cassandra>
测试清单:
- A连接到自己的cassandra
- A连接到B的cassandra
- B连接到自己的cassandra
- B连接到A的cassandra
- A连接到自己的cassandra,写入并读取键值
- A连接到B的cassandra,写入并读取键值
- B连接到自己的cassandra,写入并读取键值
- B连接到A的cassandra,写入并读取键值
测试清单二:
- B停止Cassandra服务,B连接到A并写入数据,重启B的Cassandra服务,B连接到自身的Casssandra,查看刚刚在A写入的数据(以-f方式运行观察,B重启时,立即自动与A同步!非常好!)
参考链接
- http://wiki.apache.org/cassandra/GettingStarted
TODO
- Thrift+Python/PHP写几个小玩具
- K/V型和R型比较,各自的比较和总结
反馈
创建 by -- ZoomQuiet [2010-01-10 16:32:30]
补充 by -- -- flyinflash 2010-01-11 )>>