应用了tomcat native技术之后，tomcat在跟操作系统级别的交互方面可以做得更好，并且它更像apache一个，可以更好地作为一台web server。
如果是win32/wind64的操作系统，可以下载tcnative-1-ipv4.dll或tcnative-1-ipv6.dll，并把这些文件放在%TOMCAT_HOME%/bin目录下就可以了，这样tomcat会有更好的performance。
目前，Tomcat Native的最新版本是1.1.14，其下载地址是：
需要选择相应的操作系统，对于windows操作系统比较方便，直接下载dll文件，然后丢到tomcat的bin即可，而对于linux，还需要按照document进行配置跟编辑才能使用。
没有使用tomcat native技术进行启动，系统启动需要3秒多。而将tomcat native放到bin目录之后，启动飞快，一秒种搞定！
1: 安装apr,apr-util
位置:/usr/local/
当前版本:apr-1.2.11.tar.gz,apr-util-1.2.10
分别在解压的目录中执行:
./configure && make && make isntall
最开始的情况是:
启动 tomcat
# /usr/local/etc/rc.d/tomcat6 start
默认情况下按照好了 Tomcat 6，启动时会在 /usr/local/apache-tomcat6.0/logs/stdout.log 里出现下面的：
INFO: The Apache Tomcat Native library which allows optimal performance in production environments was not found on the .library.path: /usr/local/diablo-jdk1.5.0/jre/lib/i386/client:/usr/local/diablo-jdk1.5.0/jre/lib/i386:/usr/local/diablo-jdk1.5.0/jre/../lib/i386:/usr/lib:/usr/local/lib
2:下面就来安装 tomcat-native,
# cd /usr/local/apache-tomcat6.0/bin
# tar xvf tomcat-native.tar.gz
# cd ./tomcat-native-1.1.10-src/jni/native/
# set env JAVA_HOME /usr/local/diablo-jdk1.5.0/
# ./configure --with-apr=/usr/local
# make
# make install
安装好了之后会有个提示：
----------------------------------------------------------------------
Libraries have been installed in:
/usr/local/apr/lib
If you ever happen to want to link against installed libraries
in a given directory, LIBDIR, you must either use libtool, and
specify the full pathname of the library, or use the `-LLIBDIR'
flag during linking and do at least one of the following:
- add LIBDIR to the `LD_LIBRARY_PATH' environment variable
during execution
- add LIBDIR to the `LD_RUN_PATH' environment variable
during linking
- use the `-Wl,--rpath -Wl,LIBDIR' linker flag
See any operating system documentation about shared libraries for
more information, such as the ld(1) and ld.so(
manual pages.
----------------------------------------------------------------------
安装后多出一个目录 /usr/local/apr
然后安装上面的提示操作一下就好了，我这里用的 link 的方式：
# ln -s /usr/local/apr/lib/libtcnative-1.so /usr/local/diablo-jdk1.5.0/jre/lib/i386/libtcnative-1.so
再重启 tomcat，
# /usr/local/etc/rc.d/tomcat6 restart
再看 tomcat 的日志：
# cat /usr/local/apache-tomcat6.0/logs/stdout.log
Aug 6, 2007 11:40:01 PM org.apache.catalina.core.AprLifecycleListener init
INFO: Loaded Apache Tomcat Native library 1.1.10.
Aug 6, 2007 11:40:01 PM org.apache.catalina.core.AprLifecycleListener init
……
嗯，看起来安装成功了。
更多信息和其它的配置还是去看吧。
遇到的问题：
add LIBDIR to the `LD_LIBRARY_PATH' environment variable
during execution
因为没有做这一步，运行TOMCAT的时候，总是报出找不到JDK路径的错。
设置：
export LD_LIBRARY_PATH = /usr/local/apr/lib
