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Introduction to Cacti

Introduction to Cacti. Hsu Chun-Hung Network Benchmarking Lab chhsu@nbl.org.tw. History. MRTG It will monitor SNMP network device and draw pretty pictures showing how much traffic has passed through each interface RRDTool

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Introduction to Cacti

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  1. Introduction to Cacti Hsu Chun-Hung Network Benchmarking Lab chhsu@nbl.org.tw

  2. History • MRTG • It will monitor SNMP network device and draw pretty pictures showing how much traffic has passed through each interface • RRDTool • RRDtool is the opensource industry standard, high performance data logging and graphing system for time series data. • Cacti • Complete fronted to RRDtool, manage data source, graphs and gather data.

  3. Cacti • Manage data source • Data could be CPU, Memory, Disk and Traffic etc… • Collect data by RRDtool • Administrative by MySQL • Graphing • Colored • Self-defined UI • Distributed Permission • Plugins

  4. Round Robin Database • Keep data detail for short term, aggregate data for longer term Recent data stored once every 5 minutes for the past 2 hours Old data averaged to one entry perday for the last 365 days (288:365) RRD File RRA 1:24 RRA 288:365 RRA 6:10 Medium length data averaged to one entry per half hour for the last 5 hours (6:10)‏ --step 300 (5 minute input step size) Reference: http://www.afnog.org/afnog2010/tutorial/netmgmt/presos/cacti.ppt

  5. How Cacti Works? • Group of PHP scripts connected to a MySQL database • poller.php script runs every 5 minutes (or more often) and collects data • Uses RRDtool to store data and build graphs • Use the web interface to select which data to pull and which graphs to generate (make trees of graphs) • Data which devices are monitored in which RRD files, which graphs are selected is stored via MySQL • Mostly used to measure traffic/errors/packets/CPU • Populate database using scripts to scale Reference: http://www.afnog.org/afnog2010/tutorial/netmgmt/presos/cacti.ppt

  6. Comparison

  7. Demo

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