6.3安装Cassandra数据库经验分享-Centos

1> 下载Java jdk:

我这里用的是：jdk-7u17-linux-i586.tar.gz

PS：这个是需要登录才能下载的，所以建议注册后，登录进去先下载到本地，然后再从本地计算机传到VM上去。

2> 下载完成后，解压jdk：

tar -zxvf jdk-7u17-linux-i586.tar.gz

3> 解压完成后，配置环境变量：

vim /etc/profile

在打开的文件的末尾，增加如下代码：

JAVA_HOME=/usr/local/jdk1.7.0_17

PATH=$JAVA_HOME/bin:$PATHCLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jarexport JAVA_HOMEexport PATHexport CLASSPATH

PS：只需将JAVA_HOME的路径改一下即可，改成刚才解压后jdk的目录目录即可，我的是把jdk压缩包放在/usr/local目录下了，然后直接

在这里解压的，所以解压后的包也就直接在该目录下了【jdk1.7.0_17】,所以我这里JAVA_HOME的路径为 "/usl/local/jdk1.7.0_17"

4>上面的步骤执行完成后，执行下如下命令

source /etc/profile

或者重启下linux ，配置才可生效

5> 执行完上面的步骤，下一步就是看一下java jdk是否安装成功，执行下如下命令

java -version

我这里执行后，会输出如下内容：

[root@localhost ~]# java -versionjava version "1.7.0_17"Java(TM) SE Runtime Environment (build 1.7.0_17-b02)Java HotSpot(TM) Client VM (build 23.7-b01, mixed mode)[root@localhost ~]#

说明jdk安装成功，这里的版本是1.7

支持jdk的安装到此结束，下一步是 cassandra的安装

1> 下载Cassandra：

地址：

我这里用的版本是：apache-cassandra-1.2.4-bin.tar.gz

2> 下载完成后，直接解压：

tar -zxvf apache-cassandra-1.2.4-bin.tar.gz

解压完成后，得到如下目录：apache-cassandra-1.2.4

进入该目录下的bin目录，直接启动Cassandra即可：

cd apache-cassandra-1.2.4/bin

./cassandra -f【启动cassandra】

启动后，会输出一大堆的代码，如下，表明Cassandra启动成功：

[root@localhost bin]# ./cassandraxss =-ea -javaagent:./../lib/jamm-0.2.5.jar -XX:+UseThreadPriorities -XX:ThreadPriorityPolicy=42 -Xms505M -Xmx505M -Xmn100M -XX:+HeapDumpOnOutOfMemoryError -Xss180k[root@localhost bin]#INFO 08:42:11,803 Logging initialized INFO 08:42:11,925 32bit JVM detected.It is recommended to run Cassandra on a 64bit JVM for better performance. INFO 08:42:11,930 JVM vendor/version: Java HotSpot(TM) Client VM/1.7.0_17 INFO 08:42:11,932 Heap size: 519045120/520093696 INFO 08:42:11,933 Classpath: ./../conf:./../build/classes/main:./../build/classes/thrift:./../lib/antlr-3.2.jar:./../lib/apache-cassandra-1.2.4.jar:./../lib/apache-cassandra-clientutil-1.2.4.jar:./../lib/apache-cassandra-thrift-1.2.4.jar:./../lib/avro-1.4.0-fixes.jar:./../lib/avro-1.4.0-sources-fixes.jar:./../lib/commons-cli-1.1.jar:./../lib/commons-codec-1.2.jar:./../lib/commons-lang-2.6.jar:./../lib/compress-lzf-0.8.4.jar:./../lib/concurrentlinkedhashmap-lru-1.3.jar:./../lib/guava-13.0.1.jar:./../lib/high-scale-lib-1.1.2.jar:./../lib/jackson-core-asl-1.9.2.jar:./../lib/jackson-mapper-asl-1.9.2.jar:./../lib/jamm-0.2.5.jar:./../lib/jbcrypt-0.3m.jar:./../lib/jline-1.0.jar:./../lib/json-simple-1.1.jar:./../lib/libthrift-0.7.0.jar:./../lib/Log4j-1.2.16.jar:./../lib/lz4-1.1.0.jar:./../lib/metrics-core-2.0.3.jar:./../lib/netty-3.5.9.Final.jar:./../lib/servlet-api-2.5-20081211.jar:./../lib/slf4j-api-1.7.2.jar:./../lib/slf4j-log4j12-1.7.2.jar:./../lib/snakeyaml-1.6.jar:./../lib/snappy-java-1.0.4.1.jar:./../lib/snaptree-0.1.jar:./../lib/jamm-0.2.5.jar INFO 08:42:11,998 JNA not found. Native methods will be disabled. INFO 08:42:12,207 Loading settings from file:/usr/local/apache-cassandra-1.2.4/conf/cassandra.yaml INFO 08:42:13,791), SSTableReader(path='/var/lib/cassandra/data/system/local/system-local-ib-10-Data.db'), SSTableReader(path='/var/lib/cassandra/data/system/local/system-local-ib-9-Data.db'), SSTableReader(path='/var/lib/cassandra/data/system/local/system-local-ib-13-Data.db'), SSTableReader(path='/var/lib/cassandra/data/system/local/system-local-ib-11-Data.db')] INFO 08:42:22,386 Compacted 5 sstables to [/var/lib/cassandra/data/system/local/system-local-ib-14,].917 bytes to 490 (~53% of original) in 63ms = 0.007417MB/s.5 total rows, 1 unique.Row merge counts were {1:0, 2:0, 3:0, 4:0, 5:1, } INFO 08:42:22,638 Starting Messaging Service on port 7000 INFO 08:42:22,943 Using saved token [-5549340944909481365] INFO 08:42:22,949 Enqueuing flush of Memtable-local@24819405(84/84 serialized/live bytes, 4 ops) INFO 08:42:22,951 Writing Memtable-local@24819405(84/84 serialized/live bytes, 4 ops) INFO 08:42:22,974 Completed flushing /var/lib/cassandra/data/system/local/system-local-ib-15-Data.db (120 bytes) for commitlog position ReplayPosition(segmentId=1366159340516, position=51510) INFO 08:42:22,981 Enqueuing flush of Memtable-local@28362817(51/51 serialized/live bytes, 2 ops) INFO 08:42:22,982 Writing Memtable-local@28362817(51/51 serialized/live bytes, 2 ops) INFO 08:42:23,017 Completed flushing /var/lib/cassandra/data/system/local/system-local-ib-16-Data.db (110 bytes) for commitlog position ReplayPosition(segmentId=1366159340516, position=51685) INFO 08:42:23,093 Node localhost/127.0.0.1 state jump to normal INFO 08:42:23,100 Startup completed! Now serving reads.[root@localhost bin]#

到此为止，linux上安装Cassandra已完成。