Wednesday, 2019-08-14

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chenkehello08:00
chenkeanyone here08:00
licanwei#startmeeting Watcher08:00
openstackMeeting started Wed Aug 14 08:00:31 2019 UTC and is due to finish in 60 minutes.  The chair is licanwei. Information about MeetBot at http://wiki.debian.org/MeetBot.08:00
openstackUseful Commands: #action #agreed #help #info #idea #link #topic #startvote.08:00
*** openstack changes topic to " (Meeting topic: Watcher)"08:00
DantalionHello08:00
openstackThe meeting name has been set to 'watcher'08:00
licanweihi~08:00
licanweiDantalion: hi08:01
licanwei#topic Announcements08:01
*** openstack changes topic to "Announcements (Meeting topic: Watcher)"08:01
licanweiShanghai Project Update is coming08:02
chenkeI will go there.08:03
DantalionI will not be there, is there anything planned for Watcher?08:03
licanweiI want to submit Watcher Project Update08:03
DantalionSounds good, do you need help?08:04
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licanweiDantalion: maybe some specs about CERN need your help08:05
DantalionOkaj, If so you can send me email anytime08:06
chenkeDantalion If you want to come, there will be free tickets08:07
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licanweiDantalion: thanks08:08
licanwei#topic Reviews08:09
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licanweihttps://review.opendev.org/#/c/676103/ Don't revert Migrate action needs review08:10
chenke+108:10
chenkeI agree that we don't need to revert migrate if it has been done successfully.08:11
licanweiyes08:11
DantalionI agree in general but I think it can depend on the strategy08:11
chenkeYes, I have consider about defferernt stategy.08:12
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chenkeBut after thinking about it, for each strategy, after the migration is successful, there is no need to revoke it.08:13
DantalionFor now this is fine if we ever need it in the future we can consider different types of migrate actions or passing a parameter to the migrate action08:15
chenkeWill some strategies be special?08:15
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licanweiNow no strategy need to revert migration08:16
licanweibut it's better if we can set based strategy08:16
licanweimaybe need to add a new config option08:17
licanweianother way is to add a new action08:18
chenkeYes, choose by one param.08:18
licanweimove on08:18
licanweihttps://review.opendev.org/#/c/676110/ Add Python 3 Train unit tests needs review08:19
Dantalion+1 for this patch08:20
chenke+108:20
licanweiIt's Train python3-updates goal08:20
licanweibut i don't know if tempest-plugin need to update08:20
DantalionMe neither but I think it makes sense to have all projects of Watcher use the same Python versions with unit tests08:21
licanweiok, agree08:22
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licanweihttps://review.opendev.org/#/c/675871/ node resource consolidation spec needs review08:22
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licanweiIt's new bp spec08:22
DantalionThis will take time to review08:23
licanweithanks08:23
licanweihttps://review.opendev.org/670936 rollback node status needs review08:24
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chenkeI quickly read it and I understood the meaning of this spec. Overall, this is not the same as the previous load balancing and concentrating algorithms.08:25
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chenkeBut for the detailed implementation, I have not had time to see it.08:25
licanwei#topic  Discussion08:25
*** openstack changes topic to "Discussion (Meeting topic: Watcher)"08:25
licanweiParallelism implementations threadpool vs taskflow08:26
licanweiDantalion: What's the result?08:26
DantalionI have tried both threadpool and taskflow implementations available on https://review.opendev.org/#/c/671556/ and https://review.opendev.org/#/c/671264/08:26
Dantalionthreadpool is slightly faster but not substantially, however, taskflow consumes much more memory around 480 instead of 135 megabytes for the same scope08:27
DantalionI think taskflow is to complicated supporting many features such as task order, zookeeper remote workers and revert / fallback actions08:27
DantalionWith a 16 thread threadpool the performance is between 15 and 21 times faster08:29
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licanweihttps://review.opendev.org/#/c/671264/8/watcher/decision_engine/model/collector/nova.py line 28708:29
Dantalionfrom 316 seconds to just 11 for a 44 node cell for example08:29
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licanweiyou can also set executor parameter08:30
licanweito test diffrent executor type08:30
DantalionThat's true I think I remember the default being greenthreads08:32
licanweiDo you want to merge these codes?08:33
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DantalionNot in these states, I want to write a spec. I prefer the threadpool implementation but I am interested in others opinion as well08:36
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chenkeThe effect of the thread pool depends on the time of the IO08:37
chenkePython has a GIL will affect the Parallelism time.08:37
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licanweiok08:39
licanweino more need to be dicussed08:40
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licanweithank you Corne and chenke08:41
licanweiI'll end the meeting08:41
chenkeokay.08:41
DantalionThank you and until next time08:41
licanweibye08:41
chenkeSee you~08:41
licanwei#endmeeting08:41
*** openstack changes topic to "OpenStack Meetings || https://wiki.openstack.org/wiki/Meetings/"08:41
openstackMeeting ended Wed Aug 14 08:41:48 2019 UTC.  Information about MeetBot at http://wiki.debian.org/MeetBot . (v 0.1.4)08:41
openstackMinutes:        http://eavesdrop.openstack.org/meetings/watcher/2019/watcher.2019-08-14-08.00.html08:41
openstackMinutes (text): http://eavesdrop.openstack.org/meetings/watcher/2019/watcher.2019-08-14-08.00.txt08:41
openstackLog:            http://eavesdrop.openstack.org/meetings/watcher/2019/watcher.2019-08-14-08.00.log.html08:41
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e0ne#startmeeting horizon15:02
openstackMeeting started Wed Aug 14 15:02:29 2019 UTC and is due to finish in 60 minutes.  The chair is e0ne. Information about MeetBot at http://wiki.debian.org/MeetBot.15:02
openstackUseful Commands: #action #agreed #help #info #idea #link #topic #startvote.15:02
*** openstack changes topic to " (Meeting topic: horizon)"15:02
openstackThe meeting name has been set to 'horizon'15:02
e0nehi15:02
vishalmanchandaHi15:02
e0neI don't have any updates this week15:03
vishalmanchandaMe too15:03
e0nelet's wait few minutes more if more guys join us15:03
vishalmanchandaYeah15:03
rdopierao/15:05
e0nerdopiera: hi. do you have anything to discuss?15:07
rdopieranot really, I just wanted to ask for reviews of my patches :315:07
e0nelooks like we don't have any topics for today15:07
e0nerdopiera: will do it tonight15:08
rdopieraawesome, sorry for it taking so long15:08
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e0nerdopiera: np. thanks for your contributions15:10
e0nesee you next week!15:10
e0ne#endmeeting15:11
*** openstack changes topic to "OpenStack Meetings || https://wiki.openstack.org/wiki/Meetings/"15:11
openstackMeeting ended Wed Aug 14 15:11:00 2019 UTC.  Information about MeetBot at http://wiki.debian.org/MeetBot . (v 0.1.4)15:11
openstackMinutes:        http://eavesdrop.openstack.org/meetings/horizon/2019/horizon.2019-08-14-15.02.html15:11
openstackMinutes (text): http://eavesdrop.openstack.org/meetings/horizon/2019/horizon.2019-08-14-15.02.txt15:11
openstackLog:            http://eavesdrop.openstack.org/meetings/horizon/2019/horizon.2019-08-14-15.02.log.html15:11
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