tomcat中间件的启动运行模式有分为3种,可以在启动运行控制台和启动日志中看出.默认模式bio(阻塞IO) 缺点:能非常低下,没有经过任何优化处理和支持,并发量高时,线程数较多,浪费资源.nio(异步IO)利用Java的异步IO处理,可以通过少量的线程处理大量的请求.apr(系统解决IO阻塞)从操作系统层面解决io阻塞问题,必须手动安装apr和native包.
1.bio模式(默认)
[root@node3 conf]# tailf ../logs/catalina.out
May 13, 2016 3:23:17 PM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["http-bio-82"]
May 13, 2016 3:23:17 PM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["ajp-bio-8010"]
May 13, 2016 3:23:17 PM org.apache.catalina.startup.Catalina start
INFO: Server startup in 4365 ms
2.nio模式
[root@node3 conf]# vim server.xml
<Connector port="8080" protocol="org.apache.coyote.http11.Http11NioProtocol"
connectionTimeout="20000" redirectPort="8443"/>
[root@node3 conf]# tailf ../logs/catalina.out
May 13, 2016 3:23:17 PM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["http-nio-82"]
May 13, 2016 3:23:17 PM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["ajp-nio-8010"]
May 13, 2016 3:23:17 PM org.apache.catalina.startup.Catalina start
INFO: Server startup in 4365 ms
3.apr模式
下载apr:http://mirrors.cnnic.cn/apache//apr/apr-1.5.2.tar.gz
下载apr-util:http://mirrors.cnnic.cn/apache//apr/apr-util-1.5.4.tar.gz
下载apr-iconv:http://mirrors.cnnic.cn/apache//apr/apr-iconv-1.2.1.tar.gz
[root@db01 ~]# tar xvf apr-1.5.2.tar.gz
[root@db01 ~]# tar xvf apr-util-1.5.4.tar.gz
[root@db01 ~]# tar xvf apr-iconv-1.2.1.tar.gz
[root@db01 ~]# cd apr-1.5.2
[root@db01 ~]# ./configure --prefix=/usr/local/apr-1.5.2 && make && make install
[root@db01 ~]# cd apr-iconv-1.2.1
[root@db01 ~]# ./configure --prefix=/usr/local/apr-iconv-1.2.1 --with-apr=/usr/local/apr-1.5.2 && make && make install
[root@db01 ~]# cd apr-util-1.5.4
[root@db01 ~]# ./configure --prefix=/usr/local/apr-util-1.5.4 --with-apr=/usr/local/apr-1.5.2 --with-iconv=/usr/local/apr-iconv-1.2.1 && make && make install
[root@db01 ~]# cd /usr/local/tomcat-7.0.67/bin/
[root@db01 bin]# tar xvf tomcat-native.tar.gz
[root@db01 bin]# cd tomcat-native-1.1.33-src/jni/native/
[root@db01 native]# ./configure --with-apr=/usr/local/apr-1.5.2 --with-java=/usr/local/jdk1.7.0_80
[root@db01 native]# make && make install
[root@db01 native]# vim /etc/profile
export LD_LIBRARY_PATH=/usr/local/apr-1.5.2/lib
[root@db01 native]# source /etc/profile
[root@node3 conf]# tailf ../logs/catalina.out
May 13, 2016 3:23:17 PM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["http-apr-82"]
May 13, 2016 3:23:17 PM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["ajp-apr-8010"]
May 13, 2016 3:23:17 PM org.apache.catalina.startup.Catalina start
INFO: Server startup in 4365 ms
