rembrandt:tom_s_rrd_notes
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| rembrandt:tom_s_rrd_notes [2008/09/05 14:02] – tomgee | rembrandt:tom_s_rrd_notes [2008/09/05 14:02] (current) – tomgee | ||
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| ==== Definition ==== | ==== Definition ==== | ||
| An RRD database is a circular database whose size is predetermined at creation. The RRD database tool has a set of commands to add new data, fetch data and graph data from the database. The data base expects a time series sequence of data. Each value is saved with a time stamp. | An RRD database is a circular database whose size is predetermined at creation. The RRD database tool has a set of commands to add new data, fetch data and graph data from the database. The data base expects a time series sequence of data. Each value is saved with a time stamp. | ||
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| In this example, **target.rrd** is the name of the database.\\ | In this example, **target.rrd** is the name of the database.\\ | ||
| - | The **start time** in epoch seconds is given by - -start 1023654125\\ | + | The **start time** in epoch seconds is given by --start 1023654125\\ |
| - | The **step** is the time frequency in seconds. - -step 300\\ | + | The **step** is the time frequency in seconds. --step 300\\ |
| **DS** is a keyword meaning DataSource followed by the variable name, in this case " | **DS** is a keyword meaning DataSource followed by the variable name, in this case " | ||
| **GAUGE** is the type of data which can be COUNTER, DERIVE, ABSOLUTE, GAUGE.Use GAUGE to store the data itself.\\ | **GAUGE** is the type of data which can be COUNTER, DERIVE, ABSOLUTE, GAUGE.Use GAUGE to store the data itself.\\ | ||
rembrandt/tom_s_rrd_notes.1220637725.txt.gz · Last modified: 2008/09/05 14:02 by tomgee