Using RRDPound For IO Testing
Disk IO can be a major bottleneck on collectors. There is a tool called rrdpound (which will ship in Zenoss 4.2) that allows users to heavily exercise rrdtool and benchmark CPU/IO performance. You can find a copy of rrdpound here: https://gist.github.com/5470dced53234ba47ba4
If possible, use the rrdpound that is distributed with Zenoss.
$ wget https://raw.github.com/gist/5470dced53234ba47ba4/82233853799e0631908ff1514423f717a500a935/rrdpound3.py $ chmod +x rrdpound3.py