contains two data sources and one RRA. Note that the number after the
I<last_update> keyword is in seconds since 1970. The string B<NaN>
stands for I<*UNKNOWN*> data. In the example it means that this RRD
contains two data sources and one RRA. Note that the number after the
I<last_update> keyword is in seconds since 1970. The string B<NaN>
stands for I<*UNKNOWN*> data. In the example it means that this RRD