Change Graphite Target?

We run load tests from many load generators. They all run same script, same scenario at same time. So when we use graphite to monitor, they all send data to graphite with same target. In this case, we can’t tell how each instance is doing and if one box gets bugged then the whole graphite data get messed up. you will keep seeing up and down data points.

Any ideas how we solve this problem? Any help is appreciated.

Simply set a unique metrics root per generator: