关于RRDTool的简单介绍：
RRDTool是由Tobias Oetiker开发的自由软件，它使用RRD（Round Robin Database）作为存储格式，Round robin是一种处理定量数据、以及当前元素指针的技术。RRDTool主要用来跟踪对象的变化情况，生成这些变化的走势图。
其实它和mrtg 是同一家族, 主要都是在产生time-series 的图档(如流量,负载,温度,人数…..),不过因为mrtg 当初的考量是画两种资料在图上(或四个值),后来原作者觉得不足,所以另外又开发了rrdtool, rrdtool 本身可和mrtg 结合,但其结合基本上仅在于将mrtg 的文字档的log 转成rrd 储存格式,通常user 尚需要mrtg-rrd/rrdcgi 去转换,不过总觉得美中不足,因为最终其实你用到的还是rrdtool,虽然还有像my14all () 这类的tools可以转换并画图,但其追根究底还是以rrdtool 为base, 所以rrdtool 变成了最终也是最好的选择。
平心而论rrdtool 的学习远比mrtg 来得困难,且相关文件资料也没有mrtg多,其中中文的参考又几乎没有,如果没有较深厚的Linux 基础(尤其是Shell Script) 或了解SNMP,懂得英文及好学的心,否则是不建议学习rrdtool 的.因为你可能很难去控制或获得你所要的资料,亦可能难于表现图档。
当然,每个人看法不见得相同,完全看个人需要而定,就像用mrtg 画CPU Load, Memory Usage,HTTP Client, Process…., 纯使用mrtg 是较简单且好用的,但是你要做很多图,每张图之间的关联生基本上可能需要你用眼睛去判断.但如果使用rrdtool 可以让你四张叠成一张,如此也较好比较出其中的因果关系,不过此时你得懂得控制图的表现方式来达到显示上最好的结果.基本上学rrdtool 完全不需要有mrtg 的经验. 但最好对系统资讯获得的方法(cmd/ snmp/Shell Script )熟一点会较好处理.RRDTool的优点：灵活，开放：RRDTool的典型应用：CactiNTOPNagiosSmokePingRRDWeather 等等：（我下面就会有一篇博客来写关于NTOP的配置）好了，下面开始安装我们的RRDTool：安装RRDTool的时候经常出现一下问题：如：我已经下载包所谓的rrdtool的rrdtool – 1.3.1.tar.gz包了。但是./ configure命令发放大量的错误提示信息。我要如何的在Red Hat Enterprise Linux 5.x – 64 安装RRDtool呢？因为：RRD是Round Robin Database的缩写。RRD是一个系统用来存储和显示的时间序列数据（即网络带宽，，机房温度，服务器的平均负载）。它存储数据在一个非常紧凑的方式，将不随时间变化的数据扩大，并提出了处理数据，以执行某种有用的数据密度图。它可以使用，也可以通过简单的包装脚本（shell或perl）或通过前端设备的调查网络，提供友好的用户界面。下面介绍在RHEL上安装RRDTool。为了在Red Hat Enterprise Linux 上安装RRTool，您需要安装一些开发工具和库。步骤1：安装需要依赖的包：以root用户登录，然后输入一下命令：#yum install cairo-devel libxml2-devel pango-devel pango libpng-devel freetype freetype-devel libart_lgpl-devel输入此命令后出出现以下信息：Loaded plugins: rhnpluginThis system is not registered with RHN.RHN support will be disabled.Setting up Install ProcessPackage pango-1.14.9-6.el5.i386 already installed and latest versionPackage freetype-2.2.1-21.el5_3.i386 already installed and latest versionResolving Dependencies–> Running transaction check—> Package cairo-devel.i386 0:1.2.4-5.el5 set to be updated–> Processing Dependency: fontconfig-devel >= 2.0 for package: cairo-devel–> Processing Dependency: libXrender-devel for package: cairo-devel—> Package freetype-devel.i386 0:2.2.1-21.el5_3 set to be updated–> Processing Dependency: zlib-devel for package: freetype-devel—> Package libart_lgpl-devel.i386 0:2.3.17-4 set to be updated—> Package libpng-devel.i386 2:1.2.10-7.1.el5_3.2 set to be updated—> Package libxml2-devel.i386 0:2.6.26-2.1.2.8 set to be updated—> Package pango-devel.i386 0:1.14.9-6.el5 set to be updated–> Processing Dependency: glib2-devel >= 2.12.0-1 for package: pango-devel–> Processing Dependency: libX11-devel for package: pango-devel–> Processing Dependency: libXft-devel for package: pango-devel–> Processing Dependency: libXext-devel for package: pango-devel–> Running transaction check—> Package fontconfig-devel.i386 0:2.4.1-7.el5 set to be updated—> Package glib2-devel.i386 0:2.12.3-4.el5_3.1 set to be updated—> Package libX11-devel.i386 0:1.0.3-11.el5 set to be updated–> Processing Dependency: xorg-x11-proto-devel >= 7.1-2 for package: libX11-devel–> Processing Dependency: libXau-devel for package: libX11-devel–> Processing Dependency: libXdmcp-devel for package: libX11-devel—> Package libXext-devel.i386 0:1.0.1-2.1 set to be updated—> Package libXft-devel.i386 0:2.1.10-1.1 set to be updated—> Package libXrender-devel.i386 0:0.9.1-3.1 set to be updated—> Package zlib-devel.i386 0:1.2.3-3 set to be updated–> Running transaction check—> Package libXau-devel.i386 0:1.0.1-3.1 set to be updated—> Package libXdmcp-devel.i386 0:1.0.1-2.1 set to be updated—> Package xorg-x11-proto-devel.i386 0:7.1-13.el5 set to be updated–> Processing Dependency: mesa-libGL-devel for package: xorg-x11-proto-devel–> Running transaction check—> Package mesa-libGL-devel.i386 0:6.5.1-7.7.el5 set to be updated–> Finished Dependency ResolutionDependencies Resolved================================================================================Package Arch Version Repository Size================================================================================Installing:cairo-devel i386 1.2.4-5.el5 base 130 kfreetype-devel i386 2.2.1-21.el5_3 base 146 klibart_lgpl-devel i386 2.3.17-4 base 21 klibpng-devel i386 2:1.2.10-7.1.el5_3.2 base 181 klibxml2-devel i386 2.6.26-2.1.2.8 base 2.1 Mpango-devel i386 1.14.9-6.el5 base 274 kInstalling for dependencies:fontconfig-devel i386 2.4.1-7.el5 base 168 kglib2-devel i386 2.12.3-4.el5_3.1 base 1.2 MlibX11-devel i386 1.0.3-11.el5 base 661 klibXau-devel i386 1.0.1-3.1 base 11 klibXdmcp-devel i386 1.0.1-2.1 base 7.6 klibXext-devel i386 1.0.1-2.1 base 57 klibXft-devel i386 2.1.10-1.1 base 16 klibXrender-devel i386 0.9.1-3.1 base 8.9 kmesa-libGL-devel i386 6.5.1-7.7.el5 base 465 kxorg-x11-proto-devel i386 7.1-13.el5 base 247 kzlib-devel i386 1.2.3-3 base 100 kTransaction Summary================================================================================Install 17 Package(s) Update 0 Package(s) Remove 0 Package(s) Total download size: 5.8 MIs this ok [y/N]: yDownloading Packages:(1/17): libXdmcp-devel-1.0.1-2.1.i386.rpm | 7.6 kB 00:00 (2/17): libXrender-devel-0.9.1-3.1.i386.rpm | 8.9 kB 00:00 (3/17): libXau-devel-1.0.1-3.1.i386.rpm | 11 kB 00:00 (4/17): libXft-devel-2.1.10-1.1.i386.rpm | 16 kB 00:00 (5/17): libart_lgpl-devel-2.3.17-4.i386.rpm | 21 kB 00:00 (6/17): libXext-devel-1.0.1-2.1.i386.rpm | 57 kB 00:00 (7/17): zlib-devel-1.2.3-3.i386.rpm | 100 kB 00:00 (8/17): cairo-devel-1.2.4-5.el5.i386.rpm | 130 kB 00:00 (9/17): freetype-devel-2.2.1-21.el5_3.i386.rpm | 146 kB 00:00 (10/17): fontconfig-devel-2.4.1-7.el5.i386.rpm | 168 kB 00:00 (11/17): libpng-devel-1.2.10-7.1.el5_3.2.i386.rpm | 181 kB 00:00 (12/17): xorg-x11-proto-devel-7.1-13.el5.i386.rpm | 247 kB 00:00 (13/17): pango-devel-1.14.9-6.el5.i386.rpm | 274 kB 00:00 (14/17): mesa-libGL-devel-6.5.1-7.7.el5.i386.rpm | 465 kB 00:00 (15/17): libX11-devel-1.0.3-11.el5.i386.rpm | 661 kB 00:00 (16/17): glib2-devel-2.12.3-4.el5_3.1.i386.rpm | 1.2 MB 00:00 (17/17): libxml2-devel-2.6.26-2.1.2.8.i386.rpm | 2.1 MB 00:00 ——————————————————————————–Total 2.1 MB/s | 5.8 MB 00:02 Running rpm_check_debugRunning Transaction TestFinished Transaction TestTransaction Test SucceededRunning Transaction Installing : zlib-devel 1/17 Installing : glib2-devel 2/17 Installing : freetype-devel 3/17 Installing : fontconfig-devel 4/17 Installing : libpng-devel 5/17 Installing : libXau-devel 6/17 Installing : libxml2-devel 7/17 Installing : libart_lgpl-devel 8/17 Installing : xorg-x11-proto-devel 9/17 Installing : libX11-devel 10/17 Installing : libXrender-devel 11/17 Installing : libXft-devel 12/17 Installing : cairo-devel 13/17 Installing : libXext-devel 14/17 Installing : libXdmcp-devel 15/17 Installing : mesa-libGL-devel 16/17 Installing : pango-devel 17/17 Installed: cairo-devel.i386 0:1.2.4-5.el5 freetype-devel.i386 0:2.2.1-21.el5_3 libart_lgpl-devel.i386 0:2.3.17-4 libpng-devel.i386 2:1.2.10-7.1.el5_3.2 libxml2-devel.i386 0:2.6.26-2.1.2.8 pango-devel.i386 0:1.14.9-6.el5 Dependency Installed: fontconfig-devel.i386 0:2.4.1-7.el5 glib2-devel.i386 0:2.12.3-4.el5_3.1 libX11-devel.i386 0:1.0.3-11.el5 libXau-devel.i386 0:1.0.1-3.1 libXdmcp-devel.i386 0:1.0.1-2.1 libXext-devel.i386 0:1.0.1-2.1 libXft-devel.i386 0:2.1.10-1.1 libXrender-devel.i386 0:0.9.1-3.1 mesa-libGL-devel.i386 0:6.5.1-7.7.el5 xorg-x11-proto-devel.i386 0:7.1-13.el5 zlib-devel.i386 0:1.2.3-3 Complete!步骤2：下载最新版本的RRDTool源码包#cd /opt/#wget #tar -zxvf rrdtool-1.3.1.tar.gz #cd rrdtools步骤3：编译和安装RRDTool：您需要设置PKG_CONFIG_PATH，请输入#export PKG_CONFIG_PATH=/usr/lib/pkgconfig/#./configure现在，在RHEL上编译和安装RRDTool。#make#make install#cd /usr/local/#ln -s rrdtool-1.3.1/ rrdtool/#cd rrdtool#ls –l如何验证我的安装呢？现在RRDTool已经安装上了，并且已经准备好，可以被使用了。您可以到/usr/local/rrdtool/share/rrdtool/examples/ directory 下运行它们去查看你是否成功安装了RRDTool？#cd /usr/local/rrdtool/share/rrdtool/examples/#./stripes.pl#ls -l#cp stripes.png /var/www/html/ （这一步骤的前提是你本机是个WWW服务器器）在浏览器中输入 stripes.png ，看看自己的图形；
出现以上图，说明我们的安装是成功的。***可选编译时间设置*****默认情况下RRDTool将安装在/usr/local/rrdtool-1.3.1/ directory。 如果想修改默认安装目录，使用一下命令安装：#./configure –prefix=/usr/local/rrdtool#make install
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