Re: [Users] How to define max number of running VMs on a host?
On 08/21/2013 01:19 AM, lof yer wrote: I didn't see anything like this in engine-config. Is it possible to do that without using host-hooks? ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users can you explain the use case a bit? ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Re: [Users] How to define max number of running VMs on a host?
On 2013/8/22 17:17, Itamar Heim wrote: On 08/21/2013 01:19 AM, lof yer wrote: I didn't see anything like this in engine-config. Is it possible to do that without using host-hooks? ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users can you explain the use case a bit? I have 4 graphic workstations with 3 graphic cards on each. I wanna passthrough graphic cards to the VMs one by one, since one workstation has only 3 cards, I must limit the number of running VM on a host to 3. ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Re: [Users] How to define max number of running VMs on a host?
On 08/22/2013 05:24 AM, lofyer wrote: On 2013/8/22 17:17, Itamar Heim wrote: On 08/21/2013 01:19 AM, lof yer wrote: I didn't see anything like this in engine-config. Is it possible to do that without using host-hooks? ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users can you explain the use case a bit? I have 4 graphic workstations with 3 graphic cards on each. I wanna passthrough graphic cards to the VMs one by one, since one workstation has only 3 cards, I must limit the number of running VM on a host to 3. 1. I assume you use a hook for the graphic passthrough? you can just fail it if no more devices, and engine will try to schedule on next host. 2. (ab)use the reserved RAM. if you allocate to each VM reserved RAM so 3 VMs can fit a host but 4 can't, engine won't try to schedule more than 3 on the same host as it would violate the reserved rAM 3. not a hook, but a filter. in 3.3 you can write a new filter to the pluggable scheduler of MaxNumberOfVms and pass a property of 3 to it. ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Re: [Users] How to define max number of running VMs on a host?
On 2013/8/22 18:07, Itamar Heim wrote: On 08/22/2013 05:24 AM, lofyer wrote: On 2013/8/22 17:17, Itamar Heim wrote: On 08/21/2013 01:19 AM, lof yer wrote: I didn't see anything like this in engine-config. Is it possible to do that without using host-hooks? ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users can you explain the use case a bit? I have 4 graphic workstations with 3 graphic cards on each. I wanna passthrough graphic cards to the VMs one by one, since one workstation has only 3 cards, I must limit the number of running VM on a host to 3. 1. I assume you use a hook for the graphic passthrough? you can just fail it if no more devices, and engine will try to schedule on next host. 2. (ab)use the reserved RAM. if you allocate to each VM reserved RAM so 3 VMs can fit a host but 4 can't, engine won't try to schedule more than 3 on the same host as it would violate the reserved rAM 3. not a hook, but a filter. in 3.3 you can write a new filter to the pluggable scheduler of MaxNumberOfVms and pass a property of 3 to it. Thank you very much, I think the filter is very suitable for this senerio. ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
[Users] How to define max number of running VMs on a host?
I didn't see anything like this in engine-config. Is it possible to do that without using host-hooks? ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
