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| mmichelson | Hi everyone | 18:15 |
|---|---|---|
| mmichelson | I'm going to get the OVN meeting started | 18:16 |
| mmichelson | #startmeeting ovn_community_development_discussion | 18:16 |
| openstack | Meeting started Thu Jan 7 18:16:14 2021 UTC and is due to finish in 60 minutes. The chair is mmichelson. Information about MeetBot at http://wiki.debian.org/MeetBot. | 18:16 |
| openstack | Useful Commands: #action #agreed #help #info #idea #link #topic #startvote. | 18:16 |
| openstack | The meeting name has been set to 'ovn_community_development_discussion' | 18:16 |
| mmichelson | So is anyone else here for the OVN meeting? | 18:16 |
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| blp | hi | 18:17 |
| mmichelson | hi blp | 18:17 |
| mmichelson | blp, I just started the meeting. Not sure who all is actually here this week | 18:17 |
| blp | I've been cocooned in staycation mode for a couple of weeks. Now I have emerged as a beautiful butterfly and ready to do some work. | 18:17 |
| mmichelson | yay! | 18:17 |
| blp | I found the linking bug that some people were experiencing trying to build ovn+ddlog. That will be fixed in the next version. | 18:18 |
| blp | I need to do a new rev of that. I'll post it when it's ready. | 18:18 |
| mmichelson | blp, what's the status of the IDL patches for OVS that DDLog is dependent on that? | 18:18 |
| mmichelson | s/that// | 18:18 |
| blp | mmichelson: I posted v4. Haven't seen any reviews. | 18:19 |
| _lore_ | hi all | 18:19 |
| blp | mmichelson: I'll rebase it against master to make sure that no changes are needed. | 18:19 |
| mmichelson | blp, OK cool. | 18:19 |
| blp | and if any are, I'll post a v5. | 18:19 |
| mmichelson | blp, When the new version of the ddlog patches are posted, I'm tempted to say we should get them merged as soon as we can | 18:19 |
| mmichelson | But if the IDL split patches are also needed, then it seems silly to merge the DDLog patches too | 18:20 |
| blp | The IDL split is a prereq. | 18:20 |
| mmichelson | ok, that's what I thought | 18:20 |
| blp | (It wasn't originally, but I got feedback that there was too much code duplication without the split.) | 18:20 |
| mmichelson | blp, okie-dokie | 18:21 |
| blp | (which was fair) | 18:21 |
| imaximets | blp, mmichelson: I'll take another look at IDL split v4 tomorrow or early next week. | 18:21 |
| mmichelson | imaximets, excellent | 18:21 |
| blp | imaximets: thanks! | 18:21 |
| blp | I'm a little shaken today with political events from yesterday. | 18:21 |
| mmichelson | We're about 4 weeks away from the proposed OVN soft freeze date for 21.03 | 18:21 |
| mmichelson | So getting more time with DDLog baked in is a good thing | 18:21 |
| blp | mmichelson: yes | 18:22 |
| mmichelson | On my side of things, I've been working up a document that discusses pain points and possible solutions for ovn-controller code. | 18:23 |
| mmichelson | At this point, the document isn't ready to be shared publicly | 18:23 |
| blp | mmichelson: OK. | 18:23 |
| blp | mmichelson: I've found the ovn-controller code pretty impenetrable lately. | 18:24 |
| mmichelson | But the gist of the doc is that ovn-controller has reached a point where it is becoming more and more common that we try to add something new but end up breaking something as a result | 18:24 |
| blp | (partly my fault of course) | 18:24 |
| mmichelson | blp, it's all our faults | 18:24 |
| mmichelson | I was kind of hoping zhouhan, blp, and others might be able to chime in with quick high-level ideas for what y'all think are the sticking points in ovn-controller, and if you have ideas for how to fix them. | 18:25 |
| mmichelson | I'd like to ensure that whatever document I publish takes into account the viewpoints of everyone and not just Red Hat people. | 18:25 |
| blp | Well, ultimately I think ddlog might help? It's very good at making incremental computation easily understood. | 18:26 |
| zhouhan | mmichelson: The lately problem was mostly related to the changes related to change-handler of local interface and port-bindings. There were some temporary code which numans planned to rework. numans also mentioned that's the next thing he will work on. | 18:27 |
| zhouhan | blp: in general I believe ddlog is the better approach | 18:28 |
| zhouhan | blp: I wonder if it is even better for ovn-controller to directly consume the NB DB, skipping the logical flow stage. Would that result in simpler implementation? | 18:29 |
| mmichelson | Hm | 18:30 |
| zhouhan | (of course this is a bigger architecture change) | 18:30 |
| zhouhan | but in reality maybe it is not harder than converting existing ovn-controller to ddlog. | 18:31 |
| blp | zhouhan: It's an option! I would like to think that doing the nb->sb transformation in one place does a lot of work in one place that otherwise would have to happen in many places. | 18:31 |
| blp | zhouhan: I don't have measurements to back that up. | 18:31 |
| mmichelson | My initial thought was that a lot of the work would be duplicated if ovn-controller is handling NB directly | 18:31 |
| blp | mmichelson: that's what i mean, yes | 18:32 |
| mmichelson | But the thing is, if logical flows aren't being generated | 18:32 |
| mmichelson | Then that could mean that the duplicated work isn't happening | 18:32 |
| blp | yes, that's possible too | 18:32 |
| mmichelson | Anyway, nice to hear some input | 18:35 |
| zhouhan | I would like to try this with ddlog, but I will still need to learn ddlog first :) | 18:35 |
| mmichelson | I should have a document ready for publication next week | 18:35 |
| blp | mmichelson: great! | 18:35 |
| zhouhan | I guess most part of the current northd ddlog would be reused for that. | 18:35 |
| mmichelson | I probably won't be suggesting DDLog as the solution, BUT, what I suggest may pave the way for DDLog to slot in more easily at some point? | 18:35 |
| blp | mmichelson: makes sense | 18:36 |
| mmichelson | Anyway that's all from me | 18:36 |
| _lore_ | can I go next? very fast | 18:38 |
| _lore_ | this week I worked on v8 of bfd support for ovn (posted upstream) | 18:38 |
| _lore_ | moreover I posted some ovn-trace fixes | 18:39 |
| blp | _lore_: all done? | 18:41 |
| blp | Anyone else? | 18:42 |
| imaximets | Small update from me | 18:43 |
| _lore_ | blp: yes sorry | 18:43 |
| _lore_ | thx | 18:43 |
| blp | _lore_: np | 18:43 |
| imaximets | For the 'diff's as a file transactions in ovsdb: I'm going to add "downgrade" related documentation and send v2 somewhere soon. | 18:44 |
| blp | imaximets: great! This change has great potential. | 18:45 |
| imaximets | And OVS is in a soft-freeze now, but I think we still could accept IDL split and ovsdb "diff"s since those were discussed and reviewed mostly. | 18:46 |
| imaximets | That's it from me. | 18:46 |
| blp | I think IDL split is ready; it just needs a final look from someone. | 18:46 |
| imaximets | blp, sure. | 18:47 |
| blp | Are we done for today? | 18:51 |
| mmichelson | I suppose so? | 18:51 |
| mmichelson | All right thanks everyone | 18:52 |
| mmichelson | #endmeeting | 18:52 |
| openstack | Meeting ended Thu Jan 7 18:52:04 2021 UTC. Information about MeetBot at http://wiki.debian.org/MeetBot . (v 0.1.4) | 18:52 |
| openstack | Minutes: http://eavesdrop.openstack.org/meetings/ovn_community_development_discussion/2021/ovn_community_development_discussion.2021-01-07-18.16.html | 18:52 |
| openstack | Minutes (text): http://eavesdrop.openstack.org/meetings/ovn_community_development_discussion/2021/ovn_community_development_discussion.2021-01-07-18.16.txt | 18:52 |
| openstack | Log: http://eavesdrop.openstack.org/meetings/ovn_community_development_discussion/2021/ovn_community_development_discussion.2021-01-07-18.16.log.html | 18:52 |
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