Currently mom issues several calls on per VM basis every 15s. Some of them are not needed, notably setting the iotune policy when nothing is configured in the engine (that's the default) This has impact on performance in scale environment
(In reply to Michal Skrivanek from comment #0) > Currently mom issues several calls on per VM basis every 15s. Some of them > are not needed, notably setting the iotune policy when nothing is configured > in the engine (that's the default) > This has impact on performance in scale environment What's the impact if? you mean calling VDSM I guess and not an empty IOtune which sets something?
Is this relevant for 4.0 as well?
Roy, can you please rephrase the question? Impact is a heavy API call every few ms on a busy host. Doron, yes.
verified on : Red Hat Enterprise Virtualization Manager Version: 3.6.7.2-0.1.el6 verification steps: 1. installting mom-0.5.4-1 on 3.6 host (from here: https://brewweb.engineering.redhat.com/brew/buildinfo?buildID=497698) 2. run some VMs with guest agent 3. check in vdsm logs that logs with the words :vmSetIoTune and vmGetIoTune won't appere comment- I didn't get mom-0.5.4-1 from the latest build, but downloaded directry from this link: https://brewweb.engineering.redhat.com/brew/buildinfo?buildID=497698)