1.安裝相對應版本的JDK
轉自http://blog.csdn.net/snowdream86/article/details/6677450
The version number shown describes the version of the JRE the class file is compatible with.
The reported major numbers are:
J2SE 8 = 52,
J2SE 7 = 51,
J2SE 6.0 = 50,
J2SE 5.0 = 49,
JDK 1.4 = 48,
JDK 1.3 = 47,
JDK 1.2 = 46,
JDK 1.1 = 45
(source: http://en.wikipedia.org/wiki/Java_class_file )
第一步:下載jdk-7-linux-i586.tar.gz
- wget -c http://download.oracle.com/otn-pub/java/jdk/7/jdk-7-linux-i586.tar.gz
第二步:解壓安裝
- sudo tar zxvf ./jdk-7-linux-i586.tar.gz -C /usr/lib/jvm
- cd /usr/lib/jvm
- sudo mv jdk1.7.0/ java-7-sun
第三步:修改環境變量
- vim ~/.bashrc
- export JAVA_HOME=/usr/lib/jvm/java-7-sun
- export JRE_HOME=${JAVA_HOME}/jre
- export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
- export PATH=${JAVA_HOME}/bin:$PATH
- source ~/.bashrc
第四步:配置默認JDK版本
由於ubuntu中可能會有默認的JDK,如openjdk,所以,爲了將我們安裝的JDK設置爲默認JDK版本,還要進行如下工作。執行代碼:
- sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/java-7-sun/bin/java 300
- sudo update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/java-7-sun/bin/javac 300
- sudo update-alternatives --install /usr/bin/jar jar /usr/lib/jvm/java-7-sun/bin/jar 300
- sudo update-alternatives --install /usr/bin/javah javah /usr/lib/jvm/java-7-sun/bin/javah 300
- sudo update-alternatives --install /usr/bin/javap javap /usr/lib/jvm/java-7-sun/bin/javap 300
執行代碼:
- sudo update-alternatives --config java
系統會列出各種JDK版本,如下所示:
- snowdream@snowdream:~$ sudo update-alternatives --config java
- 有 3 個候選項可用於替換 java (提供 /usr/bin/java)。
- 選擇 路徑 優先級 狀態
- ------------------------------------------------------------
- * 0 /usr/lib/jvm/java-6-openjdk/jre/bin/java 1061 自動模式
- 1 /usr/lib/jvm/java-6-openjdk/jre/bin/java 1061 手動模式
- 2 /usr/lib/jvm/java-6-sun/jre/bin/java 63 手動模式
- 3 /usr/lib/jvm/java-7-sun/bin/java 300 手動模式
- 要維持當前值[*]請按回車鍵,或者鍵入選擇的編號:3
- update-alternatives: 使用 /usr/lib/jvm/java-7-sun/bin/java 來提供 /usr/bin/java (java),於 手動模式 中。
第五步:測試
- snowdream@snowdream:~$ java -version
- java version "1.7.0"
- Java(TM) SE Runtime Environment (build 1.7.0-b147)
- Java HotSpot(TM) Server VM (build 21.0-b17, mixed mode)
直接下載解壓的方式
$ mkdir ~/develop $ tar zxvf apache-cassandra-0.7.4-bin.tar.gz -C ~/develop/ $ cd ~/develop/apache-cassandra-0.7.4
因爲我們下載的已經是編譯過的二進制版本了,所以不需要再次使用ant編譯。
Cassandra要求具備Java環境,且要求在java 1.6以上版本,我比較傾向於使用Sun Java,當然,使用openjdk也是可以的,官方稱已經對openjdk做了測試。在Lucid上面安裝sun java需要將相應的parterner源寫入sources.list。用vi編輯/etc/apt/sources.list,加入下面這行:
deb http://archive.canonical.com/ lucid partner
之後update一下,使之獲取新的更新源,並進行安裝,
$ sudo apt-get update $ sudo apt-get install sun-java6-jdk
安裝好之後,可通過下面命令查看,說明安裝成功
$ java -version java version "1.6.0_24" Java(TM) SE Runtime Environment (build 1.6.0_24-b07) Java HotSpot(TM) Client VM (build 19.1-b02, mixed mode, sharing) $ javac -version javac 1.6.0_24
配置單點cassandra
創建cassandra配置文件cassandra.yaml中需要的路徑,爲了保證當前用戶具有相應權限,更改一下其所有者。
$ sudo mkdir -p /var/lib/cassandra $ sudo chown -R `whoami` /var/lib/cassandra $ sudo mkdir -p /var/log/cassandra $ sudo chown -R `whoami` /var/log/cassandra
由於我是遠程登錄過去了,防止在cassandra啓動之後,輸出內容佔滿了屏幕,啓用遠程管理利器tmux或screen,之後啓動cassandra
$ screen $ ./bin/cassandra -f
deb http://www.apache.org/dist/cassandra/debian 11x main
deb-src http://www.apache.org/dist/cassandra/debian 11x main
2)添加PUBLIC_KEY
gpg --keyserver pgp.mit.edu --recv-keys F758CE318D77295D
gpg --export --armor F758CE318D77295D | sudo apt-key add -
gpg --keyserver pgp.mit.edu --recv-keys 2B5C1B00
gpg --export --armor 2B5C1B00 | sudo apt-key add -
3)install cassandra
sudo apt-get update
sudo apt-get install cassandra
sudo mkdir -p /var/log/cassandra
sudo chown -R `whoami` /var/log/cassandra
sudo mkdir -p /var/lib/cassandra
sudo chown -R `whoami` /var/lib/cassandra
4)start cassandrasudo cassandra -f
4.a)自動啓動cassandra
/etc/init.d/cassandra start
/etc/init.d/cassandra status
關閉cassandra
sudo /etc/init.d/cassandra stop
5) test cassandra
ps auwx | grep cassandra
cassandra-cli
Connected to: "Test Cluster" on 127.0.0.1/9160Welcome to Cassandra CLI version 1.0.7Type 'help;' or '?' for help.Type 'quit;' or 'exit;' to quit.[default@unknown]
6) 配置文件The configuration files are located in /etc/cassandra
Start-up options (heap size, etc) can be configured in /etc/default/cassandra
參考:
http://dmyz.org/archives/404
http://www.oschina.net/question/12_63305
http://wiki.apache.org/cassandra/GettingStarted
The reported major numbers are:
J2SE 8 = 52,
J2SE 7 = 51,
J2SE 6.0 = 50,
J2SE 5.0 = 49,
JDK 1.4 = 48,
JDK 1.3 = 47,
JDK 1.2 = 46,
JDK 1.1 = 45
(source: http://en.wikipedia.org/wiki/Java_class_file )
The stack size specified is too small, Specify at least 228k
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.
- /var/lib/cassandra (data directories)
- /var/log/cassandra (log directory)
- /var/run/cassandra (runtime files)
- /usr/share/cassandra (environment settings)
- /usr/share/cassandra/lib (JAR files)
- /usr/bin (binary files)
- /usr/sbin
- /etc/cassandra (configuration files)
- /etc/init.d (service startup script)
- /etc/security/limits.d (cassandra user limits)
- /etc/default
在 Linux 平臺上安裝 JNA (Java Native Access) 會優化 Cassandra 的內存使用,要安裝 JNA 很簡單,只需要從這裏下載 jna.jar 文件,並將這個文件保存到 /usr/share/cassandra/lib 目錄即可.