Hi, I am trying to connect to a server running esx and collect system metrics like cpu usage, network and disk iops. I am able to establish the connection successfully and obtain VM information such as ids, domain names, config xml etc. But I am unable to collect statistics. I am using the python interface and if I do , conn=libvirt.openAuth(uri, auth, 0) dom-conn.lookupByID(id) // Where id is the domain id of the vms netstats=dom.interfaceStats(interface) gives an error libvirt.libvirtError: this function is not supported by the connection driver: virDomainInterfaceStats The same goes for block stats. For the cpu, I used, cpu=dom.info()[4] but, that always returns 0 (I thought it was cumulative and returns a huge value) I have used similar scripts with xen and kvm and it worked well. Can someone tell me what mistake I am doing or if the driver doesnt support these functions, is there any other way of getting the stats ?? Thank you. - Regards, Sethuraman Subbiah Graduate Student - NC state University M.S in Computer Science