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openstackgerrit | Tom Barron proposed openstack/manila master: WIP: Use constants for microversion values https://review.openstack.org/509152 | 03:07 |
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bswartz | ganso tbarron: soft deletes are not only about auditing -- they're also faster | 18:12 |
bswartz | ganso: I agree it should be possible to query for deleted records or not as long as we continue with soft deletes | 18:13 |
bswartz | however I'm not sure why anyone would want that | 18:14 |
bswartz | what is the use case for loading deleted driver private share data | 18:14 |
tbarron | if there's no use case (and I don't think there is) for loading deleted driver share private share data then the only justification is speedup when deleting private share data | 18:16 |
tbarron | is that an optimization that we care about? | 18:17 |
bswartz | consistency is often more valuable than optimization | 18:17 |
tbarron | the cost here is proportional to the number of records rather than its size, right? | 18:17 |
bswartz | which cost | 18:18 |
tbarron | bswartz: ack on consistency, which was a point in the earlier conversation | 18:18 |
tbarron | speed cost, your point on soft deletes | 18:18 |
bswartz | I have no data to back that up | 18:18 |
bswartz | on older SQL databases, updates were always dramatically faster than deletes | 18:19 |
tbarron | well I think soft deletes are a speed optimization too (w/o current data) | 18:19 |
tbarron | but I think the number of records deleted matter | 18:19 |
tbarron | and suspect that with driver private data that number is usually one | 18:19 |
bswartz | the downside is that you need to index on the deleted column to no slow down your queries as garbage accumulates | 18:19 |
tbarron | since we load k-v pairs inside a single record | 18:20 |
tbarron | so I think the consistency argument (we always do soft deletes, even if in some cases there is no speedup and no audit need) is more important | 18:20 |
tbarron | And that that consistency argument could be met by "but it makes this code ugly (when we fix the bug ganso pointed to) and we can add in-code comment and devref doc so no one gets confused | 18:21 |
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tbarron | But I'm not dug in on this, just explaining my reaction to ganso's posing of the issue. | 18:22 |
tbarron | ganso was of course posting rather than posing | 18:22 |
* tbarron is not accusing ganso of being a *poser* | 18:23 | |
ganso | tbarron: yea I am actually confused by that last statemtn | 18:23 |
bswartz | what is the bug we're trying to fix? | 18:24 |
bswartz | does someone care that listing deleted records is broken? | 18:24 |
ganso | bswartz: lemme grab launchpad link for you | 18:24 |
tbarron | ganso: don't worry about it, but a "poser" would be kinda like a faker | 18:24 |
ganso | tbarron: yea I was confused if you were saying I was a poser or not lol | 18:25 |
tbarron | ganso: just a typo | 18:25 |
ganso | #link https://bugs.launchpad.net/manila/+bug/1721123 | 18:25 |
openstack | Launchpad bug 1721123 in Manila "cannot update previously deleted drivers_private_storage entries" [Undecided,New] - Assigned to Rodrigo Barbieri (rodrigo-barbieri2010) | 18:25 |
ganso | bswartz: ^ | 18:25 |
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ganso | bswartz: listing deleted records is not broken | 18:45 |
ganso | bswartz: updating deleting records (undeleting them, which is how drivers_private_storage was initially designed) is broken | 18:45 |
ganso | s/updating deleting/updating deleted | 18:45 |
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openstackgerrit | OpenStack Proposal Bot proposed openstack/manila-ui master: Imported Translations from Zanata https://review.openstack.org/509598 | 19:11 |
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bswartz | I see | 20:50 |
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