Tuesday, 2017-04-11

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openstackgerritMerged openstack/performance-docs master: Add logs to ceph rbd test results  https://review.openstack.org/45423215:28
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openstackgerritMerged openstack/performance-docs master: Adding Test plan for ML2/ODL  https://review.openstack.org/42468915:29
DinaBelova#startmeeting Performance Team15:30
openstackMeeting started Tue Apr 11 15:30:00 2017 UTC and is due to finish in 60 minutes.  The chair is DinaBelova. Information about MeetBot at http://wiki.debian.org/MeetBot.15:30
openstackUseful Commands: #action #agreed #help #info #idea #link #topic #startvote.15:30
openstackgerritMerged openstack/performance-docs master: Ceph RBD test plan  https://review.openstack.org/45360015:30
openstackThe meeting name has been set to 'performance_team'15:30
openstackgerritMerged openstack/performance-docs master: Kube-proxy performance test plan and report  https://review.openstack.org/45225715:30
DinaBelovahello folks!15:30
DinaBelovarcherrueau tovin07 akrzos o/15:30
rcherrueauo/15:30
tovin07o/15:30
akrzosDinaBelova: o/15:30
DinaBelova#info today I have only 30 minutes - have to run to the next meeting >_<15:31
DinaBelovaso let's get started15:31
DinaBelova#topic Action Items15:31
DinaBelovalast time we had two action items, both on rcherrueau :)15:31
DinaBelovaI see you have no objections to tovin07 's commit to osprofiler15:32
rcherrueauYep. my first priority is finalising wan experiments, but I make a WIP test plan for OpenStack under WAN.15:32
DinaBelovarcherrueau ack15:32
openstackgerritMerged openstack/performance-docs master: Add Fuel CCP upgrade testing  https://review.openstack.org/45141915:32
DinaBelovaso lemme keep this action item for now15:32
openstackgerritMerged openstack/performance-docs master: Fuel-CCP OpenStack reliability testing report  https://review.openstack.org/44908715:32
rcherrueau#link https://github.com/rcherrueau/performance-docs/tree/openstack-wan15:32
rcherrueauI will iterate on that at the same time I iterate on experiments.15:32
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rcherrueauYou know, the protocol become more and more precise as I deep into experiments.15:32
DinaBelova#action rcherrueau add OpenStack testing under networking delays (e.g. multisite deployment) methodology to performance docs (openstack under WAN)15:32
DinaBelovarcherrueau true15:32
DinaBelova#topic Current progress on the planned tests15:33
rcherrueauAnyway, at some point, I expect to provide in the document the `tc` program that helps you set up traffic shaping.15:33
DinaBelovarcherrueau I guess it makes sense for you to share current progress now :)15:33
rcherrueauFor the WAN experiments, we have the felling that high latency and traffic shaping will be a problem for REST call and oslo_messaging.15:33
rcherrueauTo investigate this, we need a good knowledge of API/RPC workflow and OSProfiler is a good friend here :)15:33
rcherrueauSo we decided to go a bit further and develop a tool that automatically generate a Sequence Diagram based on a Trace.15:33
DinaBelovayay :)15:33
rcherrueau#link https://github.com/rcherrueau/osp-utils15:33
rcherrueauYou can find an sequence diagram of `openstack server create ...` in test/rsc/out.svg15:34
rcherrueau#link https://github.com/rcherrueau/osp-utils/blob/1af8c4e0a0c3e5f5722fe7cf33109eafb77c2c74/tests/rsc/out.svg15:34
rcherrueauFrom now, it's not really readable. The diagram is really huge because of tons of calls to the DB.15:34
rcherrueauBut I'm writing a folding function that let you aggregate similar traces based on a predicate.15:34
rcherrueauMaybe one last remark, the tool has been written in Haskell.15:34
rcherrueauI know this is not OpenStack compliant, but I always say to my students: the right language for the right tool ;)15:34
DinaBelovarcherrueau yeah, I noticed this already :)15:35
rcherrueauAnd I was afraid to go with python regarding the huge size of traces15:35
rcherrueauIn addition, depending how fast I go on WAN experiments, I hope I can add a Query Language to filter traces.15:35
rcherrueauFor instance, to only keep RPC calls.15:35
rcherrueauthat's all for this week on my side.15:35
DinaBelovarcherrueau ack, thanks15:35
DinaBelovabtw15:35
DinaBelovaif I'm not mistaken, tovin07, we were talking one time about adding filtration to the osprofiler report?15:36
DinaBelovato filter rpc / db / other types of calls15:36
tovin07yes15:36
tovin07we were talking about that15:37
DinaBelovatovin07 did you have a chance to look at this already?15:37
tovin07a very long time ago15:37
DinaBelova:D15:37
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tovin07maybe :D15:37
tovin07I will investigate15:37
DinaBelovaokay, I just think that this thing becomes even more actual15:37
DinaBelovathank you15:37
rcherrueautovin07: thanks15:37
tovin07btw15:37
DinaBelovatovin07 yes?15:38
tovin07I think that’s a necessary feature15:38
DinaBelovait is :)15:38
tovin07sometimes, we’ve got alot of db trace :v15:38
rcherrueautovin07: too much db traces ...15:39
tovin07yup15:39
DinaBelovatrue :) OpenStack communicates with DB in an extensive manner :)15:39
tovin07okay, we should move on to the next topic :D15:39
DinaBelovaack :)15:39
DinaBelovaakrzos sir, how's your summit preparation is going on?15:39
akrzosrunning telemetry with Ocata now15:40
akrzosalso removing the collector15:40
akrzosi expect some solid results on this by this time next week15:40
akrzosalso15:40
akrzoswe identified a big issue with gnocchi and ceph15:41
akrzosespecially evident when gnocchi is untuned15:41
DinaBelovaakrzos oh, can you please share it?15:41
akrzosa single object in ceph is used to hold a list of keys15:41
akrzoseach key is a small object in ceph for an unprocessed measure15:41
akrzosso two issues15:41
akrzosthe list of keys15:42
akrzoscan grow too large15:42
akrzosand this can cause ceph to fail15:42
akrzoswhatever your replica is15:42
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akrzosthose osds will fail15:42
DinaBelovaoh, unpleasant :D15:42
akrzosso if you have replica 3 on the metrics pool15:42
akrzos3 osds will go out15:42
akrzosso this occurs when the backlog grows15:42
DinaBelovaokay, so this definitely looks as issues #1 and issue #2 ?15:43
akrzosso if you don't have sufficent capacity to process all your measures15:43
akrzosthat can occur15:43
akrzosissue #215:43
akrzosis ceph as a filestore is bad for small objects15:43
akrzosresolution basiclly won't come until ceph bluestore is shipping15:43
akrzosand integrated15:43
akrzosso pretty much if you scale up and don't tune gnocchi15:44
akrzosyou hit ceph problems15:44
akrzosif you tune gnocchi15:44
akrzosand then scale up15:44
DinaBelovayeah, I remember concerns about it when gnocchi was starting15:44
akrzosyou'll hit ceilometer collector issues15:44
akrzosso need to test with ceilometer collector removed15:44
DinaBelovaakrzos ack, thank you sir for the update15:45
akrzosbasiclly in ocata and > you can change the publisher to gnocchi so agent-notification can publish directly to gnocchi15:45
akrzosso thats what i am working on15:45
akrzosalso15:45
akrzosi got WIP gnocchi benchmarks in rally15:45
akrzosneeds a bit more touch up15:45
DinaBelovado you have some links to them?15:45
DinaBelovaakrzos ^^15:47
akrzosyes15:47
akrzos#link https://review.openstack.org/#/c/453861/15:48
DinaBelovaakrzos thanks!15:49
DinaBelovafrom Mirantis side - we're still working on the next cycle of testing scope, as product testing priorities strike back :) so last week was mostly around planning and some more time is required there.... from what I see right now we'll be even more k8s centric this quarter in terms of RnD15:49
DinaBelovabut it's not defined yet, sadly15:49
DinaBelovahope to give more details next time15:49
DinaBelova#topic Open Discussion15:49
DinaBelovatovin07 I see items from you sir :)15:49
DinaBelovaplease proceed15:50
tovin07yup15:50
tovin07(tovin07) OSprofiler show sql/function results (continue)15:50
tovin07rcherrueau: do you have any comment?15:50
rcherrueauyep15:50
rcherrueauI wanna try your patch, going with a devstack AIO deployment and `enable_plugin osprofiler https://git.openstack.org/openstack/osprofiler refs/changes/72/450072/2` but devstack always install osprofiler master.15:51
rcherrueauDon't know why!15:51
rcherrueauBy the way, I wrote a review based on the demo you provided in your commit message.15:51
tovin07yes, I see15:52
DinaBelovarcherrueau shouldn't that be some flag in devstack? to set up specific branch for the library?15:52
tovin07thank you rcherrueau, I will re-recheck it15:52
rcherrueauDinaBelova: no idea, I rarely use devstack15:53
rcherrueautovin07: cool15:53
tovin07okay15:53
tovin07next item15:53
tovin07(tovin07) About Rally + OSprofiler for OpenStack services (rcherrueau had discussed with Rally PTL about this)15:53
tovin07this one is related to rcherrueau (too)15:53
tovin07#link Rally + OSprofiler http://eavesdrop.openstack.org/meetings/rally/2017/rally.2017-04-10-14.05.log.html#l-3915:54
tovin07as I discussed in Rally IRC meeting yesterday15:54
tovin07<andreykurilin> Ok, I'll start a spec about it.15:54
rcherrueautovin07: nice15:55
tovin07so, I think that I can help a little bit on that work15:55
DinaBelovatovin07 thank you sir :)15:56
rcherrueauSpeaking about OSProfiler, I finally managed to get it works into kolla-ansible. Briefly, osprofiler dependency was missing in nova/keystone/glance/... containers.15:56
rcherrueauSo the import of osprofiler always failed and services never called osprofiler to put trace events into oslo_messaging15:56
tovin07rcherrueau: cool15:56
rcherrueauThis error was really silent!15:56
tovin07yes15:57
DinaBelovarcherrueau ah, so that was about right configuration in the end :)15:57
DinaBelova95% of all issues :D15:57
tovin07osprofiler is not a required dependency15:57
tovin07it’s optional15:57
rcherrueauDinaBelova: yep :D15:57
DinaBelovaok, folks, I have to run to other meeting... tovin07 rcherrueau akrzos anything to share at last minutes?15:58
tovin07nope15:58
rcherrueauno15:58
DinaBelovathank you folks! have a nice day / evening!15:58
DinaBelova#endmeeting15:58
openstackMeeting ended Tue Apr 11 15:58:37 2017 UTC.  Information about MeetBot at http://wiki.debian.org/MeetBot . (v 0.1.4)15:58
openstackMinutes:        http://eavesdrop.openstack.org/meetings/performance_team/2017/performance_team.2017-04-11-15.30.html15:58
rcherrueauthanks15:58
openstackMinutes (text): http://eavesdrop.openstack.org/meetings/performance_team/2017/performance_team.2017-04-11-15.30.txt15:58
openstackLog:            http://eavesdrop.openstack.org/meetings/performance_team/2017/performance_team.2017-04-11-15.30.log.html15:58
akrzosThanks!15:58
tovin07thanks!15:58
tovin07:D15:58
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