| Posted | Nick | Remark | |
|---|---|---|---|
| #openstack-nova - 2021-05-06 | |||
| 10:54:31 | sean-k-mooney | the allocation dont need to move | |
| 10:54:35 | gibi | yepp | |
| 10:55:14 | sean-k-mooney | what we can do its encode the libvirt logic which is in the neutron patch in an oslo patch | |
| 10:55:14 | sean-k-mooney | what we can do its encode the libvirt logic which is in the neutron patch in an oslo patch | |
| 10:55:20 | sean-k-mooney | and then use that | |
| 10:55:20 | sean-k-mooney | and then use that | |
| 10:55:42 | sean-k-mooney | for libvirt at least it woudl not change behaivor and for other driver i suspect it wont either | |
| 10:55:42 | sean-k-mooney | for libvirt at least it woudl not change behaivor and for other driver i suspect it wont either | |
| 10:55:56 | gibi | I cannot comment on other drivers cases | |
| 10:55:56 | gibi | I cannot comment on other drivers cases | |
| 10:56:11 | sean-k-mooney | well ironic they use the ironic node uuid as the name right? | |
| 10:56:11 | sean-k-mooney | well ironic they use the ironic node uuid as the name right? | |
| 10:56:32 | sean-k-mooney | not sure what hyperv or vmware does | |
| 10:56:32 | sean-k-mooney | not sure what hyperv or vmware does | |
| 10:56:38 | gibi | yes. but I don't know if neutron ever needs that | |
| 10:56:38 | gibi | yes. but I don't know if neutron ever needs that | |
| 10:56:49 | gibi | that = ironic node name | |
| 10:56:49 | gibi | that = ironic node name | |
| 10:56:57 | sean-k-mooney | ya the neutron agent dont run on the ironic nodes | |
| 10:56:57 | sean-k-mooney | ya the neutron agent dont run on the ironic nodes | |
| 10:57:35 | gibi | I have to jump to a call from the top of the hour | |
| 10:57:35 | gibi | I have to jump to a call from the top of the hour | |
| 10:57:50 | gibi | I linked this discussion to the neutron patch for reference | |
| 10:57:50 | gibi | I linked this discussion to the neutron patch for reference | |
| 10:57:54 | sean-k-mooney | no worries thanks for litening | |
| 10:57:54 | sean-k-mooney | no worries thanks for litening | |
| 10:58:51 | sean-k-mooney | ill try an follow up downstream and see if we can come to can concreate conclutions | |
| 10:58:51 | sean-k-mooney | ill try an follow up downstream and see if we can come to can concreate conclutions | |
| 10:59:09 | gibi | OK | |
| 10:59:34 | gibi | sorry for being dense | |
| 10:59:34 | gibi | sorry for being dense | |
| 10:59:51 | sean-k-mooney | you werent being dense | |
| 10:59:51 | sean-k-mooney | you werent being dense | |
| 10:59:58 | sean-k-mooney | it helped | |
| 10:59:58 | sean-k-mooney | it helped | |
| 11:00:55 | gibi | then I'm glad :) | |
| 11:00:55 | gibi | then I'm glad :) | |
| 12:18:18 | sean-k-mooney | gibi: would adding a new weigher need a spec. or could that be a specless blueprint | |
| 12:18:18 | sean-k-mooney | gibi: would adding a new weigher need a spec. or could that be a specless blueprint | |
| 12:18:49 | gibi | if the config of the weigher is trivial then I'm OK with a specless bp | |
| 12:18:49 | gibi | if the config of the weigher is trivial then I'm OK with a specless bp | |
| 12:19:37 | sean-k-mooney | i have 2 that i think might be useful. 1 is weighe based on the number of runing instnace and the other is a weigher that prefers the current host an instance is on | |
| 12:19:37 | sean-k-mooney | i have 2 that i think might be useful. 1 is weighe based on the number of runing instnace and the other is a weigher that prefers the current host an instance is on | |
| 12:20:59 | gibi | please note that today all the weigher is turned on by default so more weigher means a more complex behavior. | |
| 12:20:59 | gibi | please note that today all the weigher is turned on by default so more weigher means a more complex behavior. | |
| 12:21:23 | gibi | * all the weighers are | |
| 12:21:23 | gibi | * all the weighers are | |
| 12:21:59 | sean-k-mooney | yep | |
| 12:22:20 | sean-k-mooney | we may or may not want that for these | |
| 12:22:20 | sean-k-mooney | we may or may not want that for these | |
| 12:22:44 | sean-k-mooney | basically our perf team has a bunch of hosts with differnt size for ram disk and cpu | |
| 12:22:44 | sean-k-mooney | basically our perf team has a bunch of hosts with differnt size for ram disk and cpu | |
| 12:23:11 | sean-k-mooney | and they are booting a bunch of small instance and they are all landing on 2 hosts because it has much more ram,cpu and disk then the others | |
| 12:23:11 | sean-k-mooney | and they are booting a bunch of small instance and they are all landing on 2 hosts because it has much more ram,cpu and disk then the others | |
| 12:24:36 | gibi | I think it is a valid need to have weighers that are not turned on by default | |
| 12:24:36 | gibi | I think it is a valid need to have weighers that are not turned on by default | |
| 12:24:38 | sean-k-mooney | as in the have 46 hosts and booted about 520 instace at this point and they have 2 host with 237 and 247 instances | |
| 12:24:38 | sean-k-mooney | as in the have 46 hosts and booted about 520 instace at this point and they have 2 host with 237 and 247 instances | |
| 12:25:57 | sean-k-mooney | so having a pretty dumb weither that jsut spread or packed by instances would help them. im goign to get them to set host_subset_size=46 so its just a random choice for now | |
| 12:25:57 | sean-k-mooney | so having a pretty dumb weither that jsut spread or packed by instances would help them. im goign to get them to set host_subset_size=46 so its just a random choice for now | |
| 12:26:34 | sean-k-mooney | that will get the the even distibution they want but i think it coudl be useful | |
| 12:26:34 | sean-k-mooney | that will get the the even distibution they want but i think it coudl be useful | |
| 12:27:04 | sean-k-mooney | the current host weigher would be so that people that want resize to same host to not change host could expess that preference if they really wanted too by truning on that weither | |
| 12:27:04 | sean-k-mooney | the current host weigher would be so that people that want resize to same host to not change host could expess that preference if they really wanted too by truning on that weither | |
| 12:27:51 | sean-k-mooney | gibi: im going to proably right a mini spec for moveing some of the fitlers to placmenet native approch so i could also add this there too | |
| 12:27:51 | sean-k-mooney | gibi: im going to proably right a mini spec for moveing some of the fitlers to placmenet native approch so i could also add this there too | |
| 12:28:14 | gibi | hm, I think if allow_resize_to_same_host=False then we add the scheduler will ignore the current host | |
| 12:28:14 | gibi | hm, I think if allow_resize_to_same_host=False then we add the scheduler will ignore the current host | |
| 12:28:22 | sean-k-mooney | just make it a generic schduling enhancements spec. | |
| 12:28:22 | sean-k-mooney | just make it a generic schduling enhancements spec. | |
| 12:28:32 | sean-k-mooney | gibi: it will the host manager will remove it | |
| 12:28:32 | gibi | sean-k-mooney: that also works for me | |
| 12:28:32 | sean-k-mooney | gibi: it will the host manager will remove it | |
| 12:28:32 | gibi | sean-k-mooney: that also works for me | |
| 12:28:56 | sean-k-mooney | but if you set it to ture there is no prefernce for stayingon the same host or not staying on the same host | |
| 12:28:56 | sean-k-mooney | but if you set it to ture there is no prefernce for stayingon the same host or not staying on the same host | |
| 12:29:20 | gibi | ohh, I did not know that, then I see why you need the weigher | |
| 12:29:20 | gibi | ohh, I did not know that, then I see why you need the weigher | |
| 12:29:37 | sean-k-mooney | well need is a stong word but it might be nice ot have | |
| 12:29:37 | sean-k-mooney | well need is a stong word but it might be nice ot have | |
| 12:30:15 | gibi | yeah, I agree | |
| 12:30:15 | gibi | yeah, I agree | |
| 12:30:31 | sean-k-mooney | we ocationally get customer confused by that, its not that common but it happens | |
| 12:30:31 | sean-k-mooney | we ocationally get customer confused by that, its not that common but it happens | |
| 12:42:56 | rmart04 | Hello, having some IRC issues, hopefully this works! | |
| 12:42:56 | rmart04 | Hello, having some IRC issues, hopefully this works! | |
| 12:43:54 | rmart04 | I've noticed that in VM's on Stein / host-passthrough cpu mode and dedicated core pinning policy, that the L2 and L3 cache values for the CPU do not match the physical CPU. Is this expected? Any way to configure? | |
| 12:43:54 | rmart04 | I've noticed that in VM's on Stein / host-passthrough cpu mode and dedicated core pinning policy, that the L2 and L3 cache values for the CPU do not match the physical CPU. Is this expected? Any way to configure? | |
| 12:47:13 | gibi | belmoreira: thanks for the report https://bugs.launchpad.net/nova/+bug/1924123 it is an interesting finding. Unfortunately it is not easy to fix. | |
| 12:47:15 | openstack | Launchpad bug 1924123 in OpenStack Compute (nova) "If source compute node is overcommitted instances can't be migrated" [Medium,Triaged] | |
| 12:47:15 | openstack | Launchpad bug 1924123 in OpenStack Compute (nova) "If source compute node is overcommitted instances can't be migrated" [Medium,Triaged] | |
| 12:47:15 | gibi | belmoreira: thanks for the report https://bugs.launchpad.net/nova/+bug/1924123 it is an interesting finding. Unfortunately it is not easy to fix. | |
| 12:50:00 | sean-k-mooney | rmart04: yes | |
| 12:50:00 | sean-k-mooney | rmart04: yes | |
| 12:50:19 | sean-k-mooney | you can also configure passthough of the host cache info but we dont do that in nova today | |
| 12:50:19 | sean-k-mooney | you can also configure passthough of the host cache info but we dont do that in nova today | |
| 12:53:07 | rmart04 | Ah, ok so possible in Libvirt/KVM but not exposed to nova? | |
| 12:53:07 | rmart04 | Ah, ok so possible in Libvirt/KVM but not exposed to nova? | |
| 12:53:37 | sean-k-mooney | correct | |
| 12:53:37 | sean-k-mooney | correct | |