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#!html
<div style="text-align: center; color:#151B8D"><big style="font-weight: bold;"><big><big>
Cassandra 安裝與測試
</big></big></big></div> <div style="text-align: center; color:#7E2217"><big style="font-weight: bold;"><big>
 0.8.1
</big></big></div>
}}}
[[PageOutline]]


 == 1. download  ==
下載 bin 版如 apache-cassandra-0.8.1-bin.tar.gz

 == 2. single setup ==

 * 修改 conf/cassandra_env.sh
{{{
#!text
max_heap_size_in_mb=1024
}}}

 * 修改 conf/log4j-server.properties
{{{
#!text
log4j.appender.R.File=/opt/cassandra/run/system.log
}}}

 * 修改 conf/cassandra.yaml
{{{
#!text
data_file_directories: /opt/cassandra/run/data
commitlog_directory: /opt/cassandra/run/commitlog
saved_caches_directory: /opt/cassandra/run/saved_caches
}}}

 == 3. run ==

{{{
bin/cassandra  
...(程序跑於背景)

bin/cassandra-cli
[default@unknown] (進入指令交談模式)
}}}

 == 4. 操作 ==
{{{
create keyspace Keyspace1;

use Keyspace1;

create column family Users with comparator=UTF8Type and default_validation_class=UTF8Type and key_validation_class=UTF8Type;

set Users[jsmith][first] = 'John';

set Users[jsmith][last] = 'Smith';

set Users[jsmith][age] = long(42);

get Users[jsmith];
}}}

{{{
#!text
  set Users[jsmith][first] = 'John';
        \      \        \          \
         \      \_ key   \          \_ value
          \               \_ column
           \_ column family

}}}


== ps. 注意 ==
 * 在Cassandra0.6.x中，​​默認實現的是與Hadoop0.20.x的整合