JRobin :: RRDTool Choice for the Java World :: Quick reference（转自http://www.360doc.com/content/11/0）

rrdtool create test.rrd

RrdDef rrdDef = new RrdDef("test.rrd");

--start 1000111222

rrdDef.setStartTime(1000111222L);

--step 300

rrdDef.setStep(300);

DS:input:COUNTER:600:0:U

rrdDef.addDatasource("input", "COUNTER", 600, 0, Double.NaN);

RRA:AVERAGE:0.5:6:700

rrdDef.addArchive("AVERAGE", 0.5, 6, 700)

[Enter]

RrdDb rrdDb = new RrdDb(rrdDef);

rrdtool update test.rrd

RrdDb rrdDb = new RrdDb("test.rrd");

Sample sample = rrdDb.createSample();

1000111222:23.45:U

sample.setTime(1000111222L);

sample.setValue(0, 23.45);

sample.setValue(1, Double.NaN);

-t input:output

1000111222:12.345:U

sample.setTime(1000111222L);

sample.setValue("input", 12.345);

sample.setValue("output", Double.NaN);

[Enter]

sample.update();

rrdtool last test.rrd

RrdDb rrdDb = new RrdDb("test.rrd");

[Enter]

long lastUpdateTime = rrdDb.getLastUpdateTime();

rrdtool fetch test.rrd

RrdDb rrdDb = new RrdDb("test.rrd");

AVERAGE

--start 1000111222

--end 1000222333

FetchRequest req = rrdDb.createFetchRequest("AVERAGE",

1000111222L, 1000222333L);

AVERAGE

--start 1000111222

--end 1000222333

--resolution 600

FetchRequest req = rrdDb.createFetchRequest("AVERAGE",

1000111222L, 1000222333L, 600);

[Enter]

FetchData fetchData = req.fetchData();

rrdtool dump

test.rrd > test.xml

RrdDb rrdDb = new RrdRb("test.rrd");

[Enter]

rrdDb.dumpXml("test.xml");

rrdtool restore

new.rrd old.xml

[Enter]

RrdDb rrdDb = new RrdDb("new.rrd" "old.xml");

rrdtool graph

traffic.png

RrdGraphDef def = new RrdGraphDef();

String pngFile = "traffic.png";

--start 1000111222

--end 1000222333

def.setTimePeriod(1000111222L, 1000222333L);

--start "10/25/2003"

--end "10/28/2003"

def.setTimePeriod(Util.getTimestamp(2003, 9, 25),

Util.getTimestamp(2003, 9, 28));*

-w 400 -h 200

int pngWidth = 400, pngHeight = 200;

-v "this is y-axis"

def.setVerticalLabel("this is y-axis");

-t "this is graph title"

def.setTitle("this is graph title");

--lower-limit 1000.0

--upper-limit 2000.0

--rigid

def.setGridRange(1000.0, 2000.0, true);

--background image_path

def.setBackground("image_path");

--color BACK#FF0080

def.setBackColor(new Color(0xFF, 0x00, 0x80));

--color CANVAS#FF0080

def.setCanvasColor(new Color(0xFF, 0x00, 0x80));

--base 1024

def.setBaseValue(1024);

--units-exponent 6

def.setUnitsExponent(6);

--no-legend

def.setShowLegend(false);

DEF:in=traffic.rrd:input:AVERAGE

def.datasource("in", "traffic.rrd", "input", "AVERAGE");

CDEF:in1=in,8,*

def.datasource("in1", "in,8,*");

CDEF:in2=rpn_expression

def.datasource("in2", "rpn_expression");

LINE1:in#0000FF:"input"

def.line("in", new Color(0, 0, 0xFF), "input");

AREA:in1#00FF00:"input 1"

def.area("in1", new Color(0, 0xFF, 0), "input 1");

STACK:in2#FFFF00:"input 2\r"

def.stack("in2", new Color(0xFF, 0xFF, 0), "input 2@r");

COMMENT:"This is a comment"

def.comment("This is a comment");

GPRINT:in:AVERAGE:

"avg=%.2lf %sbits/sec"

def.gprint("in", "AVERAGE", "avg=@2 @sbits/sec");

GPRINT:in1:MAX:

"avg1=%5.2lf %Sbits/sec\r"

def.gprint("in1", "MAX", "avg1=@5.2 @Sbits/sec@r);

[Enter]

RrdGraph g = new RrdGraph(def);

g.saveAsPNG(pngFile, pngWidth, pngHeight);**

rrdtool xport

--start 1000111222

--end 1000222333

RrdExportDef def =

new RrdExportDef(1000111222L, 1000222333L);

DEF:xval=test.rrd:x:AVERAGE

def.datasource("xval", "test.rrd", "x", "AVERAGE");

XPORT:xval:"X values"

def.export("xval", "X values");

--maxrows 100

RrdExport export = new RrdExport(def);

ExportData data = export.fetch(100);

[Enter]

System.out.println(data.exportXml());

rrdtool tune file.rrd

--heartbeat input:600

RrdToolkit toolkit = RrdToolkit.getInstance();

toolkit.setDsHeartbeat("file.rrd", "input", 600);

rrdtool tune file.rrd

--maximum input:10000

RrdToolkit toolkit = RrdToolkit.getInstance();

toolkit.setDsMaxValue("file.rrd", "input", 10000, false);