Prometheus developer here.<p>&gt; Did you (or has anyone else) migrate your legacy data from graphite to prometheus?<p>Prometheus isn&#x27;t intended as a long-term data store, so there&#x27;s usually not much point. The data model is also quite different.<p>&gt; What&#x27;s the grafana support like on top?<p>Grafana supports Prometheus as a 1st class integration, and when I was speaking with the Raintank team in person they are very supportive of Prometheus.<p>&gt; Do you need to run a proxy or something to support the same querying or does it require reworking all the existing graphs?<p>The data model and query language is more powerful and very different, you have to redo all the graphs.<p>To aid transition we have <a href="https:&#x2F;&#x2F;github.com&#x2F;prometheus&#x2F;graphite_exporter" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;prometheus&#x2F;graphite_exporter</a> which will take in graphite formatted exports from your clients, and convert it to the format Prometheus likes.