Friday, 2016-07-15

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thorst__efried: 3575 - is that support in REST yet?11:35
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efriedthorst_, for GET, yes.  See 3540 for PUT.  But 3575 doesn't break any compatibility with the original stuff (at least that's the theory) so it's harmless to merge.13:45
thorst_well, until we try to use it13:53
thorst_but yeah13:53
thorst_more or less agree.  It'll be good to have that.  We can get some simplified locking.13:53
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-openstackstatus- NOTICE: Gerrit is restarting to correct memory/performance issues.14:18
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thorst_efried: 3595 - flipped that back on ya14:24
efriedthorst_, mm, I like it.14:26
thorst_my only thought is it smells now like it should go in base_partition14:27
efriedNo14:28
thorst_yeah, its different enuf14:29
efriedWe don't have any complex query-ish stuff in the wrappers.14:29
efriedYour other change set made me think of something, though.14:29
thorst_I did see how silly it was to have a method named 'get_lpars' that takes in a parameter 'get_lpars'14:29
efriedIf we're concerned with reducing the number of calls, the new partition.get method maybe should look for the management partition in the already-fetched list before doing the call to get_mgmt_partition.14:30
thorst_efried: There are actually a few optimizations around that...14:30
efriedShould be cheaper to do14:30
efriedif any(p.is_mgmt_partition for p in rets)14:30
thorst_like storing the mgmt partitions uuid in a global variable14:31
thorst_so that you can look up by UUID direct14:31
thorst_subsequently14:31
efriedyuh14:31
thorst_but one little bit at a time.14:31
thorst_I'm sure jearnold will come scold us if its truly bad14:31
efriedHe'll never notice LPAR GETs.  They're super fast.14:32
efriedBut that doesn't mean we shouldn't make the code better.14:32
thorst_well, its readable as is14:32
thorst_if it performs well, then I'm fine14:32
efriedAnyway, jenkins failed ya, so you have the opportunity to change it if you want.14:32
thorst_meh14:33
efriedoh, it's just sonar auth.14:33
efriedSo thorst_, in 3596, whyncha cache the mgmt partition uuid?14:36
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thorst_efried: meh meh meh14:41
thorst_ok14:41
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adreznecSo thorst_ efried esberglu - I've been poking around more plugin projects lately and noticed some of them are doing versions a bit differently than we are for the *-powervm projects14:44
adreznecWhere we started at 1.0.0 and have been working up from there, they align their versions with the project they're plugging in to14:44
adreznecSo rather than nova-powervm being 3.0.0, it would be 14.0.0 to align with the base Nova version of 14.0.014:45
thorst_hmm...I'd rather not change mid release.  I've already told some what our version number would be14:45
thorst_I'd rather consider doing that for maybe Ocata?14:45
adreznecYeah, that was kind of my thought as well14:45
adreznecJust wanted to see what people thought of it14:45
adreznecI think it seems less confusing for consumers14:46
thorst_yeah, I like it personally14:46
adreznecOr at least more clear exactly what version matches up with the core project14:46
adreznecSomething to keep on the back burner then14:47
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efriedthorst_: VSCSIBus may eliminate the entire need for FeedTask.15:05
efriedThat's a big change.15:06
thorst_efried: I'm not sure.15:08
thorst_cause you still need to work across many things, have the retries, etc..15:08
efriedI don't know if you need retries.15:08
thorst_hmm...I'm not willing to say you don't yet.15:09
thorst_its such a collosal change (in that it affects so many aspects of things - like scrubbing, remote rebuilding, etc...) that we'd have to do a SUPER thorough regression15:10
thorst_I think we'll have a requirement coming in that may make it something we have to do though...but I think that's in a few months15:10
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efriedthorst_: Scrubbers are looking at VFC maps as well as VSCSI maps.  Ergo unlikely to benefit from VSCSIBus at all.16:19
thorst_efried: I still think the feedtask has value16:19
efriedUnless we implement VFCBus16:19
thorst_I think what it works against is just different potentially16:19
efriedWell, we need to keep it for the above anyway.16:20
thorst_true16:20
efriedHaving a FeedTask against a feed of VSCSIBus, though - not sure there's a whole lot of point.16:20
efriedIt should be vanishingly rare that we need to retry a VSCSIBus POST.16:20
efriedWhat scenario can you come up with where multiple threads would be operating on the *same* LPAR's mappings at the same time?16:21
thorst_I need time to digest this statement16:21
thorst_cause while you get the feed...16:21
thorst_you then delete element by element...16:21
thorst_and thus wouldn't need FeedTask...16:22
thorst_(delete or add element by element)16:22
efriedDeleting or adding entire buses, yeah, the FeedTask is n/a completely.16:22
efriedThe question is around POSTing (i.e. adding/removing storage mappings from a given bus)16:22
efriedTheoretically, some other thread could POST the same bus at the same time.  But I can't think of a scenario where that could possibly legitimately be happening.16:23
efriedI would even take the risk of it happening out-of-band.16:23
thorst_right right16:23
efriedIn fact, the only time we'll be POSTing a bus in the first place is when we're adding/removing storage on an existing VM.16:25
efriedWhich is itself a very rare operation.16:25
thorst_well, not that rare.16:26
thorst_rare sure, but not rare in the context of half the operations we provide.16:26
efriedMore rare than instance create/delete16:26
efriedYeah, I'm not talking about code rare.  I'm talking about usage rare.16:27
thorst_o, so this wouldn't be used for instance create?16:27
efried"this" what?16:27
efriedInstance create could *avoid* the feed GET and just PUT the new bus(es).16:27
thorst_nevermind...I got caught in semantic of POST and PUT16:28
efriedAssuming there's no stale buses hanging around, so the scrub has to happen first.16:28
efriedthorst_, do we typically stuff the cfg drive and boot/data disks on the same bus?16:30
thorst_yeah16:30
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thorst_efried: See my comment on 3595.  Thoughts switching from get to list?17:57
efriedthorst_, Yeah, it made me a little uncomfortable because we have EntryWrapper.get().17:58
efriedCan't do 'list' because reserved word.17:58
thorst_ahh, right...17:58
efriedI really don't have a problem with get_partitions.17:58
thorst_enumerate, find, etc...17:59
efriedlist_wrappers?17:59
thorst_I didn't like get_partitions because the call would be 'partition.get_partitions'17:59
thorst_it just seemed redundant17:59
efriedI got that, but meh.18:01
thorst_I'm actually going to use list_wrappers18:01
thorst_seems...ok18:01
efriedthorst_, decided on get_partitions after all?18:16
thorst_heh...yeah18:28
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efriedthorst_, Did you see my essay in 3575?18:43
thorst_efried: No....looking at an OSA thing with Ashana18:43
efriedno hurry.18:44
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openstackgerritEric Berglund proposed openstack/nova-powervm: DNM: ci check  https://review.openstack.org/32831519:05
thorst_svenkat: Those changes to the mechanism driver on the neutron side...none of those would go through.19:18
thorst_we have to figure out how to get to pass those checks rather than turning them off.19:18
thorst_which may be why a new agent is needed.19:18
svenkatok.. these data will come from sriov agent19:18
svenkatyes...19:18
thorst_alright.  Maybe that's a good place to start.  On that agent.19:18
svenkatyes. i will subclass SriovNicSwitchAgent and update methods with pypowervm calls.19:20
svenkathow about mechanism driver itself, do we need to subclass it as well, or we can keep existing one.  it has vif type as hw_veb19:23
thorst_making a mechanism driver is quite small, is it not?19:23
thorst_see SEA?19:24
svenkatsure.19:24
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openstackgerritDrew Thorstensen proposed openstack/networking-powervm: Change to return non-novalink vs all lpars  https://review.openstack.org/34112520:01
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mdrabethorst: question about this chunk https://github.com/openstack/nova-powervm/blob/master/nova_powervm/virt/powervm/volume/vscsi.py#L380-L39120:16
mdrabeWhy not just continue on to remove the mapping and the hdisk anyway?20:16
mdrabethorst_ ^20:17
thorst_I believe the disconnect would've failed20:17
mdrabeOk that's what I figured20:17
thorst_efried: in other news...remind me to whine about networking agent at the mid cycle20:18
openstackgerritDrew Thorstensen proposed openstack/networking-powervm: Change to return non-novalink vs all lpars  https://review.openstack.org/34112520:18
efriednetworking agent.  whine.  got it.20:18
efriedthorst_, did we ever implement a re-entrant lock?20:19
thorst_efried: nope20:20
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