RRDtool

简介
安装／配置
预定义常量
范例
- Procedural PECL/rrd example
- OOP PECL/rrd example
RRD 函数
- rrd_create — Creates rrd database file
- rrd_error — Gets latest error message
- rrd_fetch — Fetch the data for graph as array
- rrd_first — Gets the timestamp of the first sample from rrd file
- rrd_graph — Creates image from a data
- rrd_info — Gets information about rrd file
- rrd_last — Gets unix timestamp of the last sample
- rrd_lastupdate — Gets information about last updated data
- rrd_restore — Restores the RRD file from XML dump
- rrd_tune — Tunes some RRD database file header options
- rrd_update — Updates the RRD database
- rrd_version — Gets information about underlying rrdtool library
- rrd_xport — Exports the information about RRD database
- rrdc_disconnect — Close any outstanding connection to rrd caching daemon
RRDCreator — The RRDCreator class
- RRDCreator::addArchive — Adds RRA - archive of data values for each data source
- RRDCreator::addDataSource — Adds data source definition for RRD database
- RRDCreator::__construct — Creates new RRDCreator instance
- RRDCreator::save — Saves the RRD database to a file
RRDGraph — The RRDGraph class
- RRDGraph::__construct — Creates new RRDGraph instance
- RRDGraph::save — Saves the result of query into image
- RRDGraph::saveVerbose — Saves the RRD database query into image and returns the verbose information about generated graph
- RRDGraph::setOptions — Sets the options for rrd graph export
RRDUpdater — The RRDUpdater class
- RRDUpdater::__construct — Creates new RRDUpdater instance
- RRDUpdater::update — Update the RRD database file