Wednesday, 2021-02-10

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leducflorianHi14:30
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ttx#startmeeting large_scale_sig15:00
openstackMeeting started Wed Feb 10 15:00:01 2021 UTC and is due to finish in 60 minutes.  The chair is ttx. Information about MeetBot at http://wiki.debian.org/MeetBot.15:00
openstackUseful Commands: #action #agreed #help #info #idea #link #topic #startvote.15:00
*** openstack changes topic to " (Meeting topic: large_scale_sig)"15:00
openstackThe meeting name has been set to 'large_scale_sig'15:00
ttx#topic Rollcall15:00
*** openstack changes topic to "Rollcall (Meeting topic: large_scale_sig)"15:00
ttxWho is here for the Large Scale SIG meeting ?15:00
alistarleo/15:00
ttxpinging regulars: amorin belmoreira15:00
belmoreirao/15:00
belmoreirathanks ttx15:00
amorinhello!15:00
amorinthanks15:00
alistarle@alistarle @leducflorian and @loan from Société Générale15:01
Loano/15:01
amorinwelcome guys :P15:01
ttxPretty sure genekuo will not be joining us as it's Chinese New Year15:01
ttxWe could almost do the meeting in French15:01
amorin:)15:01
belmoreira:) don't make fun of me15:01
leducflorianHello guys15:02
ttxbelmoreira: I suspect your french is better than my English15:02
ttxOur agenda for today is at:15:02
ttx#link https://etherpad.openstack.org/p/large-scale-sig-meeting15:02
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ttxFirst let's quickly review our action items from last meeting...15:02
belmoreirattx I won't bet on it15:02
ttx#topic Action items review15:02
*** openstack changes topic to "Action items review (Meeting topic: large_scale_sig)"15:02
ttx- ttx to revive the OSarchiver upstreaming effort15:02
ttxDiscussed at http://lists.openstack.org/pipermail/openstack-discuss/2021-January/020116.html15:03
ttxI'm going to gauge interest from the OpenStack TC for option (3) vs. option (2)15:03
reedip`o/15:03
ttxreedip: hi!15:03
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ttx#action ttx to contact OpenStack TC re: OSarchiver and see which option sounds best15:03
ttx- ttx to start a "how many compute nodes in your typical cluster" discussion on the ML15:03
ttxDone @ http://lists.openstack.org/pipermail/openstack-discuss/2021-January/020084.html15:03
amorinttx ack15:04
ttxThat triggered a lot of good insights, which I'll work on to summarize15:04
amorinvery good indeed15:04
ttx#action ttx to summarize "how many compute nodes in your typical cluster" thread into the wiki15:04
reedipThat's pretty concise ...15:04
ttxamorin: yes it did encourage me to start other such discussions on the ML15:04
ttx- belmoreira to post first draft of the ScaleOut FAQ15:04
ttxbelmoreira: I saw some updates passing by?15:05
belmoreirayes, updated the scaling out and upgrades sections15:05
ttx#link https://wiki.openstack.org/wiki/Large_Scale_SIG/ScaleOut15:05
ttx#link https://wiki.openstack.org/wiki/Large_Scale_SIG/UpgradeAndMaintain15:05
belmoreiralet me know if you have any comments15:05
ttxI only reviewed the first one, but it looks great15:05
belmoreiraand if you have any other questions that we can add15:06
ttxLike good enough for us to point people asking questions to it now15:06
ttx- all to think about 5-10min presentations to use in a video version of our SIG meeting15:06
ttxAny idea on that yet?15:06
belmoreiraI have few15:06
belmoreirafor example:15:07
belmoreiraRegions vs Cells15:07
belmoreiraInception - Run your OpenStack control plane on top of the infrastructure that it manages15:07
ttx(to summarize for newcomers, the idea was to once in a while do lightning talks in a video meeting version of this meeting, to touch a wider audience)15:07
belmoreiraScaling out with Nova Cells15:07
belmoreiraRabbitMQ clusters for large OpenStack Infrastructures15:07
belmoreiraUpgrades in a Large Scale infrastructure15:07
belmoreiraFine-grained scheduling in a Large Scale infrastructure15:07
belmoreiraOpenStack control plane DBs maintenance in a Large Scale infrastructure15:07
belmoreiraHow to scale Glance, Cinder and other core projects in a Large Scale infrastructure15:07
belmoreiraOperations in a Large Scale infrastructure15:07
belmoreiraAVZs with multiple Cells15:07
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amorinsounds like we have plenty of subjects for the next few month :)15:08
ttxThat's a great list! I bet a lot of people would be interested in that.15:08
amorinwe can do at OVH something about operations15:08
ttxWe should rename the meeting "Fireside chat with Belmiro, tips from searching for the Higgs Boson"15:09
belmoreirathis can be a 10 min presentation, to trigger discussion15:09
amorinwe have mistral that is doing a self-healing of openstack15:09
imtiazcThose are great topic @belmoreira15:09
belmoreirattx haha15:09
ttxOK, let's discuss at the end of the meeting when to schedule the first one, and which topic to pick15:09
alistarleSure, I think few of them can interest us at SG15:09
ttxBack to the agenda...15:10
belmoreiraplease suggest also other topics, these are just few that we can talk about15:10
imtiazcDoes operations of a large scale cover monitoring i.e getting logs and metrics15:10
ttxyes maybe I should create a wiki page or etherpad to collect topics15:10
ttxso that people can asynchronously propose those15:10
belmoreiraimtiazc I was not thinking in monitoring. But definitely we should have a session about monit15:11
reedipThat was something I asked in the last meeting as well15:12
ttxhttps://etherpad.opendev.org/p/large-scale-sig-lightning-talks15:12
reedipFor monitoring15:12
ttxbelmoreira: please dump your list in there15:12
belmoreirasure15:12
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ttxok, moving on to...15:13
ttx#topic Discussing Ceph in a future forum setting15:13
*** openstack changes topic to "Discussing Ceph in a future forum setting (Meeting topic: large_scale_sig)"15:13
ttxSo we have several new folks joining today from Societe Generale15:13
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ttxThey had questions around Ceph scaling, like:15:14
ttx- Single cluster vs. multiple smaller clusters ?15:14
ttx- Ceph cluster optimization (number of nodes, enabled features...) in a large scale cluster15:14
ttx- Performance optimization for SSD/HDD use cases15:14
ttx- Improve resilience through erasure coding implementation15:14
ttxWe did not really discuss Ceph yet15:14
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ttxBut I know CERN is running it extensively, so we should be able to tap into the group's experience running that as well15:15
leducflorianThanks for the summarize ttx15:15
ttxShould we discuss those here today? Or schedule some Ceph-specific session in the near future and try to make some noise to get more people to show up?15:15
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ttxI guess it boils down to who feels comfortable talking about their Ceph scaling15:16
belmoreiraat CERN, ceph is not managed by the Cloud team. We have a storage team that looks after all the storage solutions available in the Organization15:16
ttxAh, ok, did not know that :)15:16
imtiazcWorkday's CEPH deployment footprint is growing as well. So far, it is loosely integrated with OpenStack.15:16
ttxbelmoreira: do you think some of them might be interested in sharing their experience there?15:16
belmoreiraprobably we should point first to the presentations that they already gave in OpenStack Summits and Ceph Days15:17
ttxI was thinking we could set up some specific Ceph/OpenStack session and try to get Ceph community people + operators versed in Ceph+OpenStack to discuss how they do things15:17
belmoreiralet me find some references15:17
ttxsince we probably don;t have critical mass of Ceph experience right here today15:18
amorinat OVH, we have a specific team for that as well15:18
belmoreirabut maybe they will be open for a short presentation in one of our future sessions15:18
alistarleYes it seems in large deployment the Ceph part is likely separated from the Openstack one15:18
amorinI can ask if one of the guys could join and talk about it15:18
alistarleWhich seems to be a good idea actually15:19
ttxmaybe in the mean time we can start a few threads on the mailing-list to start collecting solutions, but also names of people to involve in that specific session15:19
leducfloriantoday at Societe Generale the cloud team manage almost all the stack (except for cinder API + ISCSI over pure storage solutions).15:19
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ttxFWIW we are interested in facilitating integration, so I'm happy to have the OpenStack large scale SIG host a Ceph-oriented discussion15:20
ttxbut if the teams are often separated, we'll likely need to do some prep work to get the right people15:21
ttxSo my proposal would be:15:22
ttx1- The SG people start a thread on a specific Ceph integration question they have on the OpenStack mailing-list, see if we get teh Ceph experts out of the woods and participating15:23
imtiazcThere is another topic, not related to scaling, but is being discussed a lot: what operating system should we continue on? For those who have been using CentOS?15:23
ttx2- Meanwhile, we plan to have in the near future a Ceph/OpenStack scaling session of the Large Scale SIG video meetings, and start gathering names of people to invite to that15:24
alistarleDoes Large Scale SIG already have video meetings or it will be a exceptional session ?15:24
ttxWe are just getting started with video meetings, and the first one should probably not be a Ceph specific one15:25
imtiazcI noticed that CERN is coming up with strategy. I would imagine all large scale operators will have to come up with a plan on how to update CentOS . Is there enough interest on this?15:25
ttxBut... at the Foundation we are also working on a format for a short/recurring virtual event15:25
loan3- Maybe it could be interesting to post a wiki about Ceph scaling (as the Large Scale SIG wiki that you created recently)?15:26
ttxso maybe we could also fit into that and get the Foundation promotion machine to help us assemble a crowd15:26
belmoreirattx I like 2, but when these meetings have some traction and attendees... to avoid some disappointment when having other teams presenting15:26
belmoreiraimtiazc ++15:26
ttxbelmoreira: yes we would need to have a number of presenters to seed the discussion15:26
ttxloan: yes, once we start collecting answers we could totally document them on the wiki15:27
ttxyou all could actually help with that :)15:27
alistarlettx: for the wiki, maybe we can begin by filling up question without answer, to launch the discussion ?15:28
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loanmaybe we misunderstood the purpose of these wikis15:29
ttximtiazc: I added that suggestion to https://etherpad.opendev.org/p/large-scale-sig-lightning-talks15:29
ttxin the sublist of things we would like to discuss but need key presenters for15:29
belmoreiraFor reference, some links about the ceph setup at CERN:15:30
belmoreirahttps://www.youtube.com/watch?v=OopRMUYiY5E15:30
belmoreirahttps://www.youtube.com/watch?v=21LF2LC58MM15:30
belmoreirahttps://www.youtube.com/watch?v=0i7ew3XXb7Q15:30
ttxalistarle: yes, that's how we've been using them. To list the questions and the answers15:30
ttxsometimes just the questions15:30
ttxalistarle: I can create a page for Ceph Q&A, seeding it with your set of questions15:31
alistarleLGTM, and we can complete them by detailing it a little more if needed15:31
ttxexactly15:31
ttxOK, let me summarize all the ideas for the meeting logs15:32
ttx#info The SG people start a thread on a specific Ceph integration question they have on the OpenStack mailing-list, see if we get the Ceph experts out of the woods and participating15:32
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ttx#info we plan to have in the near future a Ceph/OpenStack scaling session of the Large Scale SIG video meetings, and start gathering names of people to invite to that. need key presenters first15:33
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ttx#action ttx to create a wiki page for Ceph-related questions and seed it with SG questions15:33
ttx#info In the list of "sessions we would like to have but need to find the right people first", we also have CentOS upgrading15:34
ttx#info ttx should see if that sort of discussion could fit in the "regular short virtual event" format that the Foundation wants to support15:35
leducflorianthx for all those usefull references belmoreira15:35
ttxAlright, I think I captured everything15:35
ttx#info If you have ideas of lightning talks that could seed a discussion, or ideas of sessions we shouldhave but lack presenters for, please add them to https://etherpad.opendev.org/p/large-scale-sig-lightning-talks15:36
ttxAnything else on that topic?15:36
ttxBusiness summary: We don't have answers, but we have a plan to gather them :)15:37
ttxAnd yes, would be good to dig into the trove of past summit presentations see if anything useful turns up15:38
ttxCERN but also elsewhere15:38
ttx#link https://www.openstack.org/videos/search?search=Ceph15:38
ttxI did have a look, but those sounded pretty specific and not general enough15:39
loanEverything seems good. We are starting to gather informations on our side about that because it's quite urgent on our side (thining about redesigning our ceph infrastructure).15:39
loanSo maybe we will also have some results / presentations to share in a near future.15:39
ttxhttps://www.openstack.org/videos/summits/sydney-2017/the-dos-and-donts-for-ceph-and-openstack looks promising15:39
ttxAnd Florian is such a great speaker15:39
ttxAlright, if nothing else, let's move on to next topic15:40
loanyeah, it seem very interesting :)15:40
ttx#topic Progress/Blockers15:41
*** openstack changes topic to "Progress/Blockers (Meeting topic: large_scale_sig)"15:41
ttx* Stage 1 - Configure (amorin)15:41
ttx#link https://wiki.openstack.org/wiki/Large_Scale_SIG/Configure15:41
ttxAny progress/blocker to report, amorin ?15:41
amorinI havent been able to move this topic forward15:41
ttx* Stage 2 - Monitor (genekuo)15:41
ttx#link https://wiki.openstack.org/wiki/Large_Scale_SIG/Monitor15:41
ttxgene is not around, I can report a few patches were posted for oslo.metrics, slow progress on the oslo,messaging integration front15:42
ttx* Stage 3 - Scale Up (ttx)15:42
ttx#link https://wiki.openstack.org/wiki/Large_Scale_SIG/ScaleUp15:42
ttxStarted that thread on the ML and will be digesting answers on the page soon15:43
ttx# Stage 4/5 - Scale Out, upgrade & maintain (belmoreira)15:43
ttx#link https://wiki.openstack.org/wiki/Large_Scale_SIG/ScaleOut15:43
ttx#link https://wiki.openstack.org/wiki/Large_Scale_SIG/UpgradeAndMaintain15:43
ttxwe saw progress already, any blocker? help needed?15:43
belmoreiraas mentioned before, updated the pages. Please have a look.15:43
ttxok then...15:44
ttx#topic Next meeting15:44
*** openstack changes topic to "Next meeting (Meeting topic: large_scale_sig)"15:44
ttxOur next meeting should be in two weeks, Feb 24, but I'll likely not be available on Feb 24 as we have a Foundation all-hands meeting planned15:44
ttxWe can push back, or someone else can chair15:44
leducflorianplenty of information to gather thanks all15:45
ttxwe could also schedule our video meeting instead15:45
belmoreirasince you are the main driver of the group I would suggest to postpone, especially if you start the zoom15:45
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ttxbelmoreira: Is there a topic in your list you would feel comfortable running for our first video meeting the week after?15:46
ttxlike... March 3rd?15:46
ttxRegions vs Cells would probably be a hit15:47
imtiazc+115:47
belmoreiralooks good15:47
ttxthat gives us plenty of time to make some noise about it15:48
ttxalso we'll be past the Chinese new year holidays15:48
amoringood for me15:49
ttx#info Next meeting will be a Zoom meeting (usual time, link to be posted a few days before) with topic: "Regions vs. Cells" and Belmiro doing the intro talk15:49
belmoreirawe will need a place to have a zoom link. Also, ttx do you know if we can use an account from the foundation?15:49
ttxI should be able to provide a link15:49
ttx#info March 3rd, 15UTC15:49
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ttxThat works for everyone?15:50
belmoreira+115:50
genekuooops sorry I miss the meeting15:50
genekuoI will catch up with the logs15:50
ttxgenekuo: you missed all the fun!15:50
ttx#topic Open discussion15:51
*** openstack changes topic to "Open discussion (Meeting topic: large_scale_sig)"15:51
ttxgenekuo: anything specific to report? I mentioned your in-flight patches15:51
genekuoyeah, I'm almost done with the functional test as oslo.messaging side15:51
genekuoawaiting the new release for oslo.metrics to be release so that the bug can be fixed15:52
ttxgenekuo: do you run Ceph? We've been dsicussing collecting specific Ceph+OpenStack answers15:52
genekuoWe do run Ceph, but it's handled in other teams along with cinder15:52
genekuoWe have a dedicated storage team15:52
ttxhah, common pattern it seems15:53
genekuoI can probably make the oslo.messaging patch ready to review in next week15:53
ttxgenekuo: do you think they could be interested in joining a specific Ceph+OpenStack ops discussion in the near future?15:53
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ttxgenekuo: great! But you also need to enjoy the holidays15:54
genekuohmm, I can ask them15:54
loanit seem that Societe generale need to let the dedicated Cinder team also handle Ceph :')15:54
ttxloan: problem solved!15:54
ttxbefore we close, anything else, anyone?15:55
genekuoAh, I would like to mention I've reviewed the Google docs and it LGTM15:55
loanthe Google docs?15:56
ttxyou mean Belmiro's? he posted the result in the wiki15:56
genekuoyep15:56
genekuoThanks for the work :)15:56
ttxloan: belmiro had a google doc with the proposed responses to the #link https://wiki.openstack.org/wiki/Large_Scale_SIG/ScaleOut questions15:56
belmoreirathanks genekuo, it's now in the wiki15:56
ttxAlright, thanks everyone for participating and sharing your experience. Have a great week and we'll talk again in 3 weeks!15:57
genekuothank you all, sorry for being late15:57
ttxKeep an eye on the mailing list for the video meeting announcement15:57
alistarlethanks for all your inputs !15:57
alistarle\o15:57
ttx#endmeeting15:58
*** openstack changes topic to "OpenStack Meetings || https://wiki.openstack.org/wiki/Meetings/"15:58
openstackMeeting ended Wed Feb 10 15:58:03 2021 UTC.  Information about MeetBot at http://wiki.debian.org/MeetBot . (v 0.1.4)15:58
openstackMinutes:        http://eavesdrop.openstack.org/meetings/large_scale_sig/2021/large_scale_sig.2021-02-10-15.00.html15:58
openstackMinutes (text): http://eavesdrop.openstack.org/meetings/large_scale_sig/2021/large_scale_sig.2021-02-10-15.00.txt15:58
openstackLog:            http://eavesdrop.openstack.org/meetings/large_scale_sig/2021/large_scale_sig.2021-02-10-15.00.log.html15:58
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loanthx you guys. See you in march :)15:59
loan\o15:59
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