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The main focus of this page is to examine how RRDtool performs in the large scale and propose some solutions.At the University of Wisconsin at Madison, the central IT department is responsible for the majority of the campus network infrastructure which consists of approximatly 30 routers, 2,000 switches and 1,500 wireless access points.rrdtool create filename [--start|-b start time] [--step|-s step] [--template|-t template-file] [--source|-r source-file] [--no-overwrite|-O] [--daemon|-d address] [DS:ds-name[=mapped-ds-namesource-index]: DST:dst arguments] [RRA: CF:cf arguments] The create function of RRDtool lets you set up new Round Robin Database (RRD) files. RRDtool will not accept any data timed before or at the time specified.]]
Specifies the base interval in seconds with which data will be fed into the RRD. For a list of accepted formats, see the -l option in the rrdcached manual.
In reply to your comment that file/directory ownership/permissions may be the issue, I will share what I have found to be useful for my Cacti installations that run on Open BSD (aka, your placement and syntax may vary with other systems): chown -R www:www /var/www/htdocs/* echo 'web directories reset to www:www ownership' chmod -R 777 /var/www/htdocs/cacti/plugins/* chmod -R 777 /var/www/htdocs/cacti/log/* chmod -R 777 /var/www/htdocs/cacti/rra/* echo 'cacti plugin, log, and rra directories set to full r,w,x' I use weathermaps heavily in cacti and often find myself having to reset permissions over and over throughout and this has save me the headache of thinking about it constantly.
777 may be too open for these sections security-wise, and if so, I would gladly appreciate a better setting to be mentioned that still provides usability of the application.
Creating the graphs on the command line isn't that hard once you know how to set things up and it turns out doing the same in PHP is just as easy.
For this tutorial I'm going to assume you understand how to get RRDTool installed and working from the command line.
If you compile PHP by hand then see: how to build the php rrdtool extension by hand.