I setupped ganglia and configured gmetric to collect some metrics with node spoofing. Theese virtuals metrics are collected, I able to see separate graphs of metrics for each node. I created summary graphs for metrics, but they are empty. I looked into rrds in SummaryInfo, they are filled with Nan values:
<!-- 2011-11-17 14:43:45 MSK / 1321526625 --> <row><v>NaN</v><v>NaN</v></row>
Please tell me how to fix it. If you need some configs I can attach them.