Converter .rrd to json -

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i working on project have database in .rrd need , converts json, can create graphs jqueryplot. tried use following code in documentation not more, returns me following error. start time: unparsable time: toe. have idea can do?

i googling this, , found blog post mentioning rrdtool xport --json, added in rrdtool 1.4.6. not want?


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