On 05/26/2013 09:59 AM, Roy Golan wrote:
On 05/23/2013 04:23 PM, lofyer wrote:
Can host hooks be used to implement the following policy to avoid "boot storm"?
1.count and sort VMs awaiting for boot. 2.If the count is less than or equal to, for example 5, then boot all VMs and exit the script. 3.Otherwise, boot and dequeue vm0 to vm4, and minus the count by 5. 4.Sleep some time, and go to step 2. _______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
hooks run one on vm-start one by one. would be a bit tricky to do the above. roy - didn't you add some mechanism to throttle boot storms in the engine? yes at RunVmCommandBase.delay(Guid vdsId) - but it doesn't fit here. It'll delay the VM run only when there is no free memory to run the VM and will wait till engine signals after gathering statistics of
On 05/24/2013 03:22 PM, Itamar Heim wrote: powering up VMs.
lofyer - any other issue other than memory bottleneck you were trying to resolve?
Thanks, Itamar I think only cpu_load here. If I start 8 VMs(1G memory each) in a 16G host, it will be very slow for VMs to enter the desktop mode from the time I click "start". At first I thought it would be a resolution if I put these boot
δΊ 2013/5/26 15:41, Itamar Heim ει: processes into a linear squence or delay a random period by using hooks. Is there an option that I can choose to arrange the boot squence in the engine? However, since each VM takes quite a long time to startup, there is no need to do that. Just plug in more CPUs......