On Fri, Mar 08, 2013 at 10:21:27AM +0800, Mark Wu wrote: > On 03/07/2013 07:25 PM, Vinzenz Feenstra wrote: > >Please find the prettier version on the wiki: > >http://www.ovirt.org/Proposal_VDSM_-_Engine_Data_Statistics_Retrieval > > > > > > Proposal VDSM - Engine Data Statistics Retrieval > > > > > > VDSM <=> Engine data retrieval optimization > > > > > > Motivation: > > > >Currently the RHEVM engine is polling the a lot of data from VDSM > >every 15 seconds. This should be optimized and the amount of data > >requested should be more specific. > > > If the data size really matters, we could also consider to pack the > information into binary. I am not sure if it's suitable in the > transmission of XMLRPC.
I do not think we should embed binary in XMLRPC. I'd consider compressing the data at the transport layer - but that would be a completely deferent feature. > > > >For each VM the data currently contains much more information than > >actually needed which blows up the size of the XML content quite > >big. We could optimize this by splitting the reply on the > >getVmStats based on the request of the engine into sections. For > >this reason Omer Frenkel and me have split up the data into parts > >based on their usage. > > > >This data can and usually does change during the lifetime of the VM. > > > > > > Rarely Changed: > > > >This data is change not very frequent and it should be enough to > >update this only once in a while. Most commonly this data changes > >after changes made in the UI or after a migration of the VM to > >another Host. > > > > *Status* = Running > > *acpiEnable* = true > > *vmType* = kvm > > *guestName* = W864GUESTAGENTT > > *displayType* = qxl > > *guestOs* = Win 8 > > *kvmEnable* = true #/*this should be constant and never changed*/ > Then it should be removed from vm stats. In my opinion, any > information belongs to vm's static configuration, it shouldn't be > included in vm stats. For the fields above, except 'Status', engine > can get the information without querying the vdsm host. It could not > be changed by vdsm itself, right? actually, guestName and guestOs may change - for example by installing Linux on that Windows guest. _______________________________________________ vdsm-devel mailing list vdsm-devel@lists.fedorahosted.org https://lists.fedorahosted.org/mailman/listinfo/vdsm-devel